®

COSIMIR

Educational

User’s Guide

5

0

36501 EN

6/2003

Order no.

526501

Description:

Designation:

Manual

D:HB-COSIMIR-EDUNET-EN

Revision level:06/2003

Authors:

Layout:

Ulrich Karras, IRF University Dortmund

18.06.2003, Beatrice Huber

©

Festo Didactic GmbH & Co. KG, 73770 Denkendorf, Germany, 2003

Internet: www.festo.com/didactic

e-mail: did@festo.com

The copying, distribution and utilization of this document as well as the

communication of its contents to others without expressed

authorization is prohibited. Offenders will be held liable for the payment

patent, utility model or ornamental design registration.

Contents

1

.

Introduction ________________________________________5

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The COSIMIR3DSimulationSystem ____________________6

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What’s new?________________________________________7

Notation ___________________________________________9

System Requirements_______________________________10

Installation ________________________________________11

Special Notes______________________________________27

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The COSIMIREducationalConcept___________________29

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Didactic Concept____________________________________ 29

Approach andLearningGoals_________________________30

Learning via Virtual Workcells _________________________ 32

The Workcells ______________________________________ 40

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Working with COSIMIR_____________________________49

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COSIMIR Help_____________________________________50

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The COSIMIRAssistant______________________________51

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The COSIMIRUserInterface__________________________54

Window Types_____________________________________55

4

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Programming ______________________________________ 63

Teach-In __________________________________________63

Example: Programming a Workcell_____________________66

Automatic Trajectory Generation_______________________ 74

Download tothe Mitsubishi Robot Controller____________76

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5

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Simulation ________________________________________77

Settings___________________________________________ 77

Example: WorkcellSimulation________________________77

Sensor Simulation__________________________________80

PLC Simulation _____________________________________ 80

Process Simulation__________________________________ 81

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Contents

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Modelling_________________________________________ 83

Model Hierarchy ____________________________________ 83

Model Libraries_____________________________________ 84

Model Explorer _____________________________________ 85

Modelling inaWorkcell______________________________90

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1

. Introduction

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Welcome tothenew4.1 release of COSIMIREducational.

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COSIMIR Educationalprovides you with avirtuallearningenvironment

in the field of robotics. Step by step, you’ll be able to advance

independently from very simple robotics applications right through to

highly complex workcells in a highly realistic, simulated 3D work

environment.

The virtual learning environment consists of:

•

Programming and simulation environment for predefined robotic

workcells that represent typical industrial applications

The Robotics Assistant online tutorial offering comprehensive

robotics knowledge via multimedia presentations

•

The Robotics Assistant is not a CBT (computer based training), but

rather a multimedia information system that provides teachers with

support in designing courses of study, and that can be used by trainees

for autodidactic learning.

You decide yourself how you’ll proceed with your course of study. With

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its integrated library of workcells, COSIMIREducationalprovidesyou

with an introduction to robotics covering various degrees of complexity.

The library of workcells encompasses innumerable examples of typical

industrial robotic workcells, including appropriate function descriptions

and technical documentation. A sample application is included for each

workcell, and instructions are provided for implementing each

respective application. You can decide whether or not you’d like to

install the sample solutions while installing the software. Of course

you’ll also have the opportunity of developing and solving a host of

other tasks for any or all of the predefined robotic workcells.

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Festo Didactic GmbH & Co. KG • COSIMIREducational

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1

. Introduction

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The COSIMIREducationalleaningenvironmentprovidesyouwithuser

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help in a number of ways. TheCOSIMIRonlinehelpfunction isbased

on the standard HTML Windows help format. The Microsoft Internet

explorer (version 3.0 or higher) is required in order to use the help

function.

This new release incorporates many of the comments and suggestions

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we have received from COSIMIREducationalusers. Inorderto

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continue improvingCOSIMIREducational,weinvite all futureusersto

send us their comments, suggestions and criticism as well. We would

also be happy to answer any questions that might arise regarding

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COSIMIR Educational.

Just send us an e-mail at: dka@festo.com

You can also contact us by calling our telephone hotline should you

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experience problems while installingorusing COSIMIREducational.

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COSIMIR isan industrial 3D simulation system for PC basedoperating

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.1

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The COSIMIR3D

simulation system

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systems including Windows 95and98,as well as Windows NT,

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2000 andXP.COSIMIRfacilitatesthe planningofroboticworkcells,

testing the reach ability of all required positions, the development of

robotics and control programs, and layout optimisation. All motion

sequences and handling operations can be simulated in order to rule

out the possibility of collision, and to optimise cycle times.

Work-cells can be created using library components such as machines,

robots, tools, assembly lines, loaders and more with the help of

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COSIMIR modelexpansion modules.Youcan also createyourown

workcell components, and import part models and workpieces from

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other CAD systems such as AutoCAD.

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. Introduction

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We’ve integrateda hostof newworkcellsinto COSIMIREducational:

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What’s new?

•

A simple introductory workcell with Mitsubishi RV-M1 and RV-2AJ

robots

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Robotic workcells from the “Basic Robotics” workbook (BP70)

furnished to our initial robot customers, for taking advantage of

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existing learning scenarios in COSIMIREducational

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All roboticworkcellsfrom our newversionC of MPS:

•

–

Robot station

Robot station with assembly

Robot station with assembly and hydraulic punch

including comprehensive documentation of the sample programs.

Control panels are also made available as highly realistic 3D objects.

Festo handling systems

•

Robotic welding station, which is also offered as part of our

CIM/FMS system

“

Manual” feeding of workpieces is accomplished by means of simple,

supplementary buttons. It’s no longer necessary to import workpieces

as new models.

The following methodology has been utilised for the workcell sample

programs:

•

All sample programs for Mitsubishi robots use the Melfa Basic IV

programming language if supported by the utilised controller.

Otherwise, MRL is used (Movemaster Command).

•

All programs for workcells that do not include any Mitsubishi robots

have been written in universal IRL (industrial robot language).

However, Mitsubishi’s Melfa Basic IV programming language can

also be used with these workcells, although not all of the special

Mitsubishi functions can be used in this case.

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. Introduction

A graphic representation of the I/O assignment list for the workcell’s

sensors/actuators and the inputs and outputs at the robot controller

can be additionally selected in the model explorer. New connections can

be established by means of drag and drop within this display. Input and

output statuses are displayed online by mean of colour codes in the

simulation mode.

The integrated S5 soft PLC has been replaced with an S7 soft PLC.

Program modules can be displayed online in the STL mode, and can be

run in single-step operation. This provides for a much more clear-cut

representation of strictly specified PLC functionality in several of the

sample workcells.

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You’re not only able to modify the layout with the new COSIMIR

Educational release, you can also import new designs which have been

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created usingCOSIMIRIndustrialorCOSIMIRProfessional.However,

the import function does not support I/O connections, which must be

set up manually after import.

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. Introduction

1

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Certain types of notation are used for texts, key combinations

(shortcuts) and key sequences, making it easier to locate and identify

different types of information.

Notation

Text formats

The following text formats are used:

Text Format

Bold

Used for

Names of commands, menus and

dialogue boxes

Cursive

Place holder: text must be specified for

elements using cursive formatting.

CAPITALS

Acronyms, folder names and file names:

lower case letters can also be used when

entering these names.

“

Quotation marks”

Command options: quotation marks are

also used to highlight chapter titles

included as references within body text.

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. Introduction

Notation for key

Key combinations (shortcuts) and key sequences are written as follows:

combinations (shortcuts)

and key sequences

Notation

Meaning

Key 1 + Key 2

A plus sign (+) between the names of the

two keys means that both keys are

activated simultaneously.

Key 1 - Key 2

A minus sign (-) between the names of

the two keys means that they are

activated one after the other.

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Minimum Configuration

System Requirements

Processor

Pentium II, 300 MHz or higher

RAM

128 MB

850 MB

Hard disk space

Operating system

Graphic card

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Windows 95,98;NT,2000orXP

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3D acceleration and support for OpenGL,

32 MB RAM

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0

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. Introduction

Recommended Configuration

Processor

Pentium IV, 1 GHz

RAM

256 MB

650 MB

Hard disk space

Operating system

Graphic card

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Windows NT,2000orXP

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3D acceleration and support for OpenGL,

64 MB RAM

Monitor

17" screen with resolution of 1024 x 768

pixels

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A CD and this user’s guide are supplied with COSIMIREducational.The

software can be installed in two different ways:

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Installation

•

Network installation

•

Installation with online activation

Installation with

Getting started:

online activation

•

Switch on your PC and start Microsoft Windows.

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Insert the COSIMIREducationalCD ROM into theCDdiskdrive.

Click Run in the start menu.

Enter d:setup.exe to the entry field in the dialogue box which then

appears. Acknowledge your entry by clicking the OK button.

If your CD ROM disk drive has a designation other than “d:”, the

letter “d” must be replaced with the appropriate designation.

•

The installation program’s initial window appears:

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. Introduction

Follow the instructions that appear at the screen. If you are uncertain

about how you should answer any given question, click either Back or

Next.

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. Introduction

The Festo Didactic license agreement is displayed first. You must accept

the license agreement in order to continue installing the software. Click

Agree, and then click the Next button.

Now you are provided with the option of installing the software for a

single, currently logged on user only.

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. Introduction

This dialogue box prompts you to enter your product ID. The product ID

is a 12-place character string which is printed on the back of the CD

sleeve.

If the product ID is entered incorrectly, a message appears prompting

you to enter a valid product ID.

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. Introduction

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You can select the folder to which COSIMIREducationalwillbe

installed in the Directory path dialogue box.

C:\Programs\didactic\CosimirEducationalGB appears automatically as

a default directory path. If you would like to install the software to

another folder, click the Browse button.

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. Introduction

Note

In any case, you should select a folder that does not contain any other

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versions ofCOSIMIR.

You are also provided with the option of selecting a program group to

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which the COSIMIREducationalicons can be saved. FestoDidactic

appears automatically as a default program group, which you can of

course rename if you wish.

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. Introduction

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COSIMIR Educationalis now readyto beinstalled. ClicktheNext

button in order to start installation.

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Installing COSIMIR

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The initial window for the COSIMIREducationalinstallationprogram

appears.

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. Introduction

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COSIMIR Educationalcanbeinstalledalongwith twosupplementary

options, which can be selected in the following dialogue box:

We recommend to use the default settings. Click the Option button of

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COSIMIR Kernel.Followingdialog boxwillappear:

The examples include predefined robotic workcells with

comprehensively described tasks. Click the OK button. You will be

asked to confirm following selection:

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. Introduction

The corresponding solutions can also be installed.

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. Introduction

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A message appears indicating that COSIMIREducationalhasbeen

installed successfully. Click the Finish button.

Software installation has now been completed. Now you’ll need to

decide whether you want to activate your license immediately, or later.

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. Introduction

Online activation

Various options are available for enabling your license. We recommend

using the direct online activation option. Indirect online activation can

be executed from a separate PC, or you can request your activation code

on the phone.

However, this telephone service is only available from

Monday through Friday, from 8 a.m. to 10 p.m. central European time.

If you decide to use the direct, online activation option:

You are prompted to establish a connection with the Internet, after

which your license is enabled automatically.

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. Introduction

The following dialogue box appears if your PC is equipped with a

firewall that prevents incoming communication via the Internet:

Your activation key appears in the display shown above. Select this

number and copy it to the clipboard with the key combination Ctrl+C,

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and then paste it totheCOSIMIRactivationdialogue box with thekey

combination Ctrl+V. Click the Finish button in order to complete license

enabling.

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. Introduction

Indirect activation

The following dialogue box appears if you select the indirect online

activation option for inquiring at a separate PC:

Access the website at the specified web address from a separate PC.

The following display appears:

Copy the license key into the appropriate entry field and click the

Generate enable code button.

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1

. Introduction

The activation code appears. Copy this code and enter it in the

appropriate field at the PC to which the software has been installed.

Telephone inquiry

If you decide to request your enable code on the phone:

Call the phone number shown in the above dialogue box. You’ll be

asked for the license key.

You may save the license key. Click the Print/Copy… button. Following

options will be offered:

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1

. Introduction

You’ll receive your enable code in return, which must be entered to the

appropriate field. Click the Finish button in order to enable your license.

Multiple License

If you’ve purchased a multiple license, each installation must be

enabled separately. Each time an installation is enabled, a message

appears indicating how many licenses can still be issued with the

specified product ID.

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. Introduction

Network installation

Most importantly, the term network installation makes reference to

software licensing which is executed via a network from a central

license server. A green license dongle is required for network

installation. Licensing of the individual installations is executed

dynamically, and licenses can be requested from any workstation within

the network until the ordered number of licenses has been allocated.

The license server is a PC within the network that executes the licensing

procedure. The license dongle must be plugged into the parallel port of

the license server, and must be accessible to all licensed workstations

at all times.

Single workstation

Single workstations can also be licensed locally. Start installation as

described above, and the following initial window appears:

Select the second option in order to license a single workstation.

Proceed with installation as described above.

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. Introduction

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After installation has been completed, additional COSIMIRprogram

components can be installed with the help of the Change components

option.

License server

If you want to licence a workstation via a licenser server, carefully read

the included network installation instructions first.

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When you access a model for the first time from the help function, a

dialogue box appears for downloading files. Notes on working with this

dialogue box can be displayed by clicking the (Special Note) link in the

model help window:

Special Notes

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. Introduction

Known conflicts with other programs:

Winamp

As a standard function, Winamp registers file types with the “.mod”

extension in a protected mode. This makes it impossible to open models

from the help function. If Winamp has already been installed on your PC,

it must first be deinstalled, and then reinstalled with a different option

setting. Click the (Special Note) link to this end. A display appears which

includes a further link: (Known Conflicts). Click the (Known Conflicts)

link for a complete description of the correct option settings required for

Winamp.

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. The COSIMIREducationalConcept

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COSIMIR Educationalsoftwareisbased upon the concept of anopen

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Didactic Concept

learning environment.

Open learning environment means:

•

An open approach to learning characterised by constructivism, i.e.

various tools including basic knowledge, a lexicon and simulations

are made available which can be combined and utilised as desired in

accordance with your own learning objectives.

This open concept has also been implemented in organising the basic

knowledge. The central topic is robotics, which is why we call it the

“

Robotics Assistant”. It’s not laid out as a CBT or a WBT, but rather as

an interactive, multimedia knowledge and information system. The

contents of the program are presented as individual information

modules including:

•

Texts (concepts, explanations, regulations, examples etc.)

Graphics

Videos and animations

The information modules are interconnected by means of hyperlinks.

The Robotics Assistant provides you with various options for accessing

information in a targeted fashion:

•

Searches for keywords or topics

Tree structure navigator

List of selected topics

Selected information can also be printed out at any time.

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. The COSIMIREducationalConcept

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Why have we selected this open concept for imparting knowledge?

We do not perceive the acquisition of knowledge and information as

an end unto itself, but rather as a necessity for solving problems.

The project task or the problem to be solved are at the heart of our

concept, resulting in the need to acquire new knowledge in order to

solve the problem at hand.

•

Acquiring knowledge and information with modern methods based

on software technology is one of the central learning tasks in

today’s technological society.

A further didactic concept is the provision of virtual work environments

in the form of simulated robotic workcells. These are represented in 3

dimensions in order to create as realistic an image as possible.

Options for experimenting with the workcells effectively place the

trainee in a close relationship to the object under study. Knowledge

is tested and reinforced.

•

Realistic experience provided by the workcell gives rise to a new

quality of knowledge: theoretical knowledge is transformed into

practical application and skills.

The workcells promote learning by discovery at different levels of

difficulty (it works, it doesn’t work, it works more efficiently etc.).

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Robotics is a fascinating, but at the same time highly complex and

intricate technology. We restrict ourselves here to the field of industrial

robotic systems, and the area of mobile robotics will not be addressed

at all.

Approach and Learning

Goals

Target groups and

prerequisites

Our approach is aligned to vocational training in the following areas:

•

Mechatronics

•

Various technical qualifications for metalworking and electrical

engineering

•

Information technology

Our approach is aligned to technical colleges and universities. We also

assume that you, the trainee, are familiar with the Windows PC

environment.

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. The COSIMIREducationalConcept

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Trainees must be equipped with certain basic knowledge in order to get

started in the field of robotics. The Robotics Assistant provides

comprehensive basic knowledge on the subject of industrial robots (see

chapter 2.1 above). The Robotics Assistant makes it possible for the

trainee to:

•

Acquire basic knowledge independently, and in a targeted fashion

Prepare for problem solving tasks

Retrieve, and if necessary print out additional information during the

problem solving stage

We also provide teachers with the opportunity of using the Robotics

Assistant as a multimedia supplement to their own course. Thus

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COSIMIR Educationalassists you in organising the basics foryour

projected learning approach in a highly flexible way right from the

beginning of the introductory phase. We recommend covering at least

the following subjects with the Robotics Assistant for introductory

courses:

•

Definition of robots including characteristic values

Robot design with subchapters covering hardware, different types of

robots and work safety

•

Robot programming languages

That which has been read or heard can then be subjected to practical

testing, analysed and implemented by the trainee in his work with the

numerous virtual robotic workcells. Of course we are aware of the fact

that a virtual workcell is not capable of imparting all of the many

aspects of this technology. Problems associated with drive technology,

accuracy and dynamics are not taken into consideration in the

simulations. For this reason, we also offer the respective hardware

environments for several of the workcells:

•

BP70

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MPS RobotStation

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MPS RobotAssemblyStation

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MPS PunchingStation

FMS-MachineAssembly

RobWeld

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. The COSIMIREducationalConcept

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An ideal learning environment can be created with these workcells by

fulfilling the following basic requirements:

•

At least one real robotic workcell

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One workstation (learning station)witha COSIMIRIndustrial(or

•

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COSIMIR Professional)license

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Each traineehastheir own COSIMIREducationallicense

•

In this way, each trainee has the opportunity of downloading their

program to the robot controller at the real workcell, and can start up

and run their own solution to the specified problem at the actual

system.

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The virtual workcells create an experimental environment for trainees,

allowing them to experience and grasp the required basic knowledge. At

the same time, they are a point of departure for the examination of new

questions and problems, i.e. for building upon existing knowledge.

Learning via

Virtual Workcells

The educational portion supplies you with descriptions of all of the

robotic workcells, and the graphic navigator (see figure 2.1) provides

you with direct access to all applications. The descriptions of each of

the respective workcells can be opened by clicking the image of the

appropriate models in the graphic navigator:

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. The COSIMIREducationalConcept

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Figure 2.1: Model description

An animation is started by clicking the model image, and the respective

workcell is demonstrated by means of a simulation sequence. The

trainee is thus provided with visual support in addition to the workcell’s

function description. The following additional information can be

displayed:

•

Learning objectives (know how):

Here we’ve listed the typical learning objectives that can be realised

with the respective workcell as examples. Of course it is also

possible to establish additional objectives with the selected robotic

workcell, depending upon the specified tasks.

•

Description of the workcell:

This section provides a function description of the workcell, creating

the basis for the generation of one’s own tasks.

Components of the workcell:

•

This section contains a brief technical documentation of the most

significant components included in the respective workcell.

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•

I/O connections:

Here you’ll find a commentated list of I/O assignments for the robot

controller, as well as for the PLC if included.

Programming:

•

The structure of the sample program is explained, and helpful

hyperlinks and tips are provided for program writing.

In addition to, and independent of the included hyperlinks, you can also

access any explanations of terminology and basic theory which you

deem necessary for your problem solving task at any time with the help

of the assistant explorer or the index and search functions.

Introductory workcell

Which workcell should you start with? If you have no previous robotics

knowledge, we recommend beginning with the “First Steps” and “Next

Steps” models. In the First Steps workcell, simple rectangular

workpieces can be picked up from a table, moved to a pallet, and finally

positioned on a second pallet. A glass plate is located between the two

pallets in the Next Steps workcell, and an alternate position must thus

be added to the pick & place sequence in order to avoid possible

collision.

Work-cells with either the Mitsubishi RV-2AJ robot or the RV-M1

predecessor model can be selected. The RV-2AJ can be programmed

with the modern, high-level Melfa Basic IV robot language, whereas the

simple command language, Movemaster Command (MRL), must be

used with the older RV-M1. We only recommend the model with the RV-

M1 robot if your hardware environment also includes RV-M1 robots.

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Before writing a robot program, you must first learn to move the robot

and actuate its gripper. The robot can be moved within various

coordinate systems:

Joint coordinates

World coordinates

Tool coordinates

•

The various coordinate systems can be visualised in the workcell

window. Robots can be set into motion with a so-called teach panel. A

universal control module is also replicated in the simulation by means

of the teach-in window and can also be used to move the robot. For

example, attempt to move the robot by simply changing the axis

coordinates such that it is able to securely grasp a workpiece with its

gripper.

Three-dimensional

navigation

Three-dimensional navigation within the workcell presents you with an

additional problem. The representation of the workcell changes

depending upon the point of view:

•

From the top left or top right

From the front or the back

From up close or far away

At least two different views are required for trouble-free, three

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dimensional orientation.With COSIMIREducational,thenumberof

views is only limited by the performance characteristics of your PC.

Robot motion

You’ll discover that it’s quite advantageous to make use of motion

within the other coordinate systems in order to grasp a workpiece. On

the other hand, each movement executed by the robot is the result of

coordinated motion of the individual joints. These can be viewed in the

status window, for example in order to observe the means by which

axes must be moved in order to advance the gripper along the X-axis in

the world coordinate system. In order to execute the gripping operation,

the gripper must be appropriately oriented. Consider whether or not

restrictions would result in this area through the use of a 5-axis

articulated robot?

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The position list

Now that you’ve brought the robot into a position from which it can

grasp the workpiece with its gripper, you can save this point to the

position list. The position list contains all of the points to which the

robot must move directly for a given program, as well as important

ancillary points for moving along a path (mid-point, diverging point

etc.). Why is a position list so important? One could argue that as long

as the cell is known, any desired point can be calculated. Why, then,

should the robot first move to certain teaching points? The answer is

quite simple: As a rule, industrial robots demonstrate very good

repetition accuracy, but their absolute positioning accuracy is entirely

inadequate for most applications. Further details are included in the

Robotics Assistant.

One of the main tasks during commissioning of a robotics application is

testing the position list, i.e. positions established in the simulation are

tested via the real system, and are modified if necessary. It is thus

extremely important for trainees to become well acquainted with the

teach-in procedure in the simulation.

Each workcell has its own position list which you can take advantage of

in order to reduce the time required for teaching in all of the positions.

As is also the case with the teach-in procedure, two different types of

motion commands are also used for programming robot motion:

The first robot program

•

Movement from a starting point to an end point, which is known as

point-to-point movement (abbreviated PTP). The actual path to the

robot’s end point is not defined, because all axes travel to their end-

positions independent of one another.

•

Movement of the robot to the end point via a predefined path (for

example along a straight line).

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Sample task

The blue workpiece in the First Steps model must first be set onto the

middle section of the first pallet. After a waiting period of 2 seconds, it

must then be sorted into the bottom section of the second pallet.

Sequence plan

First, a sequence plan is created for the program:

1

2

.

The robot’s gripper is open.

The robot moves the gripper to the gripping position (blue

workpiece) with a PTP movement.

3

.

The gripper is closed.

4

The robot moves the gripper to the middle section of the first pallet

with a PTP movement.

5

6

7

8

.

The gripper is opened.

The robot moves linearly back to a point above the first pallet.

2 second waiting period

The robot moves the gripper back to the middle section of the first

pallet (linear movement).

9

1

.

The gripper is closed.

0. The robot moves the gripper to a point above the final position with

a PTP movement (for safety reasons).

1

1. The robot moves the gripper to the final position (linear movement).

2. The gripper is opened.

3. The robot returns to its initial position with a PTP movement.

4. End

Of course the robot’s controller is unable to understand this text, which

must be translated step by step into, for example, the Melfa Basic IV

programming language:

1

2

0 HOPEN 1

0 MOV P1, -30 “P1=gripping position”

etc.

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The sequence plan should be laid out such that each step can be

implemented by means of a command or a subprogram. At the same

time, the sequence plan provides you with ideal documentation of your

program. Details regarding Mitsubishi programming languages can be

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found inthe“Programming” chapter includedinthe COSIMIRhelp

function.

Downloading to

The program has now been created, and must be downloaded to the

®

robot controller. This procedure can be replicated in COSIMIR

the robot controller

Educational, because the simulation includes a fully fledged robot

controller. The downloading procedure is completed in two steps:

•

Compile the program, i.e. the syntax of the programming language is

checked and is translated into universal IRDATA machine code.

The machine code is downloaded to the robot controller, i.e. the

code is linked to the controller.

•

Any errors that might occur are displayed. The details for this procedure

are presented in chapter 4.2.

Simulation

The program has now been downloaded without error to the robot

controller. Start the program and observe the 3D motion sequence. You

can select either the

–

automatic mode

or the

–

single step mode,

and you’re able to determine whether or not the sequence is executed

in a logically and functionally correct fashion.

Collision detection

If the sequence is error-free, you should then check to see if any

undesired collisions occur. The Next Steps model is used to illustrate

this procedure, which includes an additional glass plate between the

two pallets. Start collision detection (see chapter 5.2), and then start

the above described program. If a collision occurs, the robot’s path

must be suitably changed. Check to see whether or not any other

collisions might occur during the sequence. Why, for example, does the

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robot move to a point above the final position for safety reasons in the

above represented sequence plan? Check the other movements and

gripping positions with this in mind.

Flexibility in

Various problems can be posed for each of the workcells. The layout of

any given workcell can be readily changed with the help of the model

explorer (see chapter 6.3), for example the pallets or the workpieces in

the First Steps model can be repositioned. Can the tasks still be

completed after repositioning? Additional components can also be

imported to the workcell (see also chapter 6.4).

designing tasks

If you use a Kuka, an ABB or a Fanuc robot in your laboratory

environment, you can use the ABB Pick & Place, FANUC Pick & Place and

KUKA Pick & Place models as alternative introductory workcells.

The IRL programming

language

Robot systems from various manufacturers use different programming

languages, although there is a standardised, universal robot

programming language known as IRL (industrial robot language). We

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have selectedthe following didactic solution for COSIMIREducational:

•

We offer the Melfa Basic IV high-level programming language or the

simple MRL command language for all robotic workcells with

Mitsubishi robots.

•

If the workcell does not include any Mitsubishi robots, we offer the

standardised IRL language. Please note that the robots in these cells

can also be programmed with Melfa Basic IV, but not all of the

language’s attributes will be supported in this case.

Keep in mind that IRL is a significantly more complex language than

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Melfa Basic IV. Details regarding IRLareincluded intheCOSIMIRhelp

function under “Programming”.

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Sensor technology

A robot can only be used flexibly if it is capable of communicating with

its work environment. The analysis of sensor signals is utilised to this

end. We have provided numerous workcells for this purpose. We

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recommend the BP70 model,andin particular the MPSRobotStation,

for getting started with this subject matter. In this workcell, the

positions of objects are detected by the robot in an elementary way, and

are evaluated for further processing. You can make use of a simulation

box with 8 inputs and outputs that are connected to the robot’s

controller in the BP70 workcell.

2

.4

The sequence in which the workcells are laid out is organised such that,

as a rule, knowledge gained in working with previous workcells is very

helpful in solving the problems posed by subsequent workcells.

However, if the trainee has prepared himself adequately, the workcells

can be processed in any other desired order. In any case, before you

begin work with any given workcell, you should carefully examine the

respective video animation, as well as instructions regarding

programming and I/O connections, and included component

descriptions.

The Workcells

FirstSteps/NextSteps

These robotic workcells have already been described in detail in chapter

2

.3. They are available with RV-2AJ and RV-M1 robots. The sample

programs for the RV-2AJ have been created with Melfa Basic IV, and for

the RV-M1 with MRL.

PickandPlaceABB.mod

The PickandPlaceABB.mod workcell includes a very simple handling

task with a type 2400-16 ABB robot, which serves as a basis for all

further tasks. Simple examination of the working space can be executed

with this workcell by repositioning the robot and the pick & place library

component. For the purpose of introduction, this workcell is also

available for Fanuc S700 and Kuka KR125Z robots. Please note that it is

very easy to replace the robot included in the workcell with any other

robot from the robot library (see also chapter 6.4). The sample

programs are written in IRL.

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PickandPlaceFesto

A similar handling task is implemented with this workcell using a Festo

2-axis pneumatic linear system. This model is also available with

sensors that detect the objects to be handled. The sample program is

written in IRL.

Festo linear gantry

The linear gantry in this workcell is equipped with a double gripper

system. It is thus capable of simultaneously removing two crankshafts

from different workpiece holders, and transferring them to different

destinations. The sample program is written in IRL.

FESTO Linear gantry with

conveyor belt

This workcell additionally includes two conveyor belts. Two crankshafts

are removed from a container. However, the container is closed and the

gantry system must wait until it has been opened. The two crankshafts

are then removed and each is transferred to a conveyor belt, by means

of which they are taken away.

BP70

This workcell is available with the Mitsubishi RV-M1 robot, as well as

the RV-2AJ. It additionally includes two workpiece holders, one tool

holder with tool, a pallet with workpieces and a simulation box with 8

inputs and outputs. A large number of different tasks can thus be

executed with the workcell:

•

Handling task

Machining task

Palletising task

The tasks section in our “Basic Robotics” workbook includes concrete

task suggestions. This was the first robotic workcell offered by Festo as

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part of the MPSproductrange.

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MPS RobotStation

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This workcell is a simulation of thenewMPSRobotStation,andis

equipped with the RV-2AJ robot. Geometric data are based upon a CAD

import of the associated design engineering data. The station performs

the following task sequence:

•

Determine the material characteristics of a workpiece held by the

robot’s gripper with the help of a sensor.

Remove workpieces from the seat in a chute after a signal has been

generated.

Detect the position of workpieces and set them down correctly

orientated at an assembly point.

Sort workpieces into magazines according to material

characteristics.

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This is the standard MPSroboticworkcell. The sampleprogramis

written in Melfa Basic IV.

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MPS RobotHandling

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The MPSRobotHandling.modworkcellis a simulationof theMPS

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“

Robot Handling” Station from Festo Didactic. It was the predecessor of

the above described station. Different types of housings must be sorted

into magazines using this workcell. The housings are either on a pallet

or in a storage bin. If the robot is to remove a housing from a storage

bin, the housing has to be added first by means of the import function.

The sample program is written in Melfa Basic IV.

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MPS RobotAssembly

®

The MPSRobotAssembly.modworkcell is a simulation of theMPS

Robot Assembly” station from Festo Didactic. It is available with the 6-

axis Mitsubishi RV-E2 robot, as well as the new 5-axis Mitsubishi RV-

AJ. It is the task of the robot to completely assemble various cylinders

“

2

from individual parts. The appropriate cylinder housing must be fed to

the robot to this end by importing the respective model from the

“

Import” folder. The sample programs are written in Melfa Basic IV for

the RV-2AJ, and in MRL for the RV-E2.

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This workcell is a simulation of a combination including the new MPS

MPS

RobotAssemblyStation

“Robot” and “Assembly” stations. The combination replaces the above

described assembly station. The “Assembly” station is controlled by a

simulated S7 PLC, or by the robot controller. A comprehensively

documented sample program is available for both variants. The

programs are identical to the respective programs for the real robotic

workcells. The task consists of assembling model cylinders from the

following components:

•

Cylinder housing

Piston

Spring (piston return spring)

Cylinder cap

Through the use of various cylinder housings (red, black and silver), it is

possible to assemble various cylinders with different piston diameters

(

identified by the colours black and silver).

®

MPS

This workcell is a virtual representation of a combination including the

®

three MPSstations“Robot”, “Assembly” and“Hydraulic Punch”.As

RobotPunchingStation

before, the “Assembly” station is controlled by a simulated S7 PLC or

the robot controller. The hydraulic punch is controlled by a simulated S7

PLC. The hydraulic punch produces the cylinder caps in this combination

station. Blank caps are fed to the punch from a cap magazine. The hole

for the piston rod is then punched into the cylinder cap and the cap is

set into a tray.

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PalletAssembly

LabAutomation

Packaging

The PalletAssembly.mod workcell includes a Mitsubishi RV-2AJ robot,

that has the task of filling a pallet with workpieces. This is also a

handling task, but robot movements take place to calculated positions

as well as to predefined positions in this case. For this task, it is also

useful to introduce the programming of loops. Feeding workpieces from

a magazine necessitates additional I/O interrogations. The sample

program is written in Melfa Basic IV.

Gripper changeover systems must be taken into consideration with the

LabAutomation.mod workcell. It must be determined whether or not a

new TCP needs to be calculated. Various tasks must be executed with

the various gripper systems, which have to be organised via I/O

communication. It is useful to elucidate the use of subprograms and

counters for the programming of this workcell. 6-axis Mitsubishi RV-E2

robots are used. The sample program is written in MRL.

A SCARA robot equipped with a vacuum gripper is utilised in the

Packaging.mod workcell. Beyond this, a conveyor belt and the creation

of additional packages must also be controlled. Removing packages

from the conveyor belt is controlled by means of I/O communication.

The sample program is written in the standardised IRL robotics

language. The integrated programming assistant can be exploited,

which provides considerable help in creating an initial program.

Disassembly

The bolts must be removed from an automobile wheel using a Reis RV-

1

6 robot in the Disassembly.mod workcell. An inductive sensor is used

to determine whether or not the robot is using the right socket wrench

to remove the bolts. Programming must be written in IRL. Knowledge of

procedural and modular programming must be acquired. Sensor

interrogations must also be incorporated into the communications

sequence in this workcell.

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Disktest

Hard disks are tested at four different stations with the Disktest.mod

workcell. The test stations perform a surface inspection of the metal

coatings on the disks. This task can be expanded with a requirement for

calculating the Cartesian coordinates of the disks, and corresponding

organisation of generated workcell data into data structures as part of

the programming.

Mitsubishi-S7

A Mitsubishi RH-5AH55 SCARA robot communicates with a PLC in this

workcell. The robot must execute simple handling tasks based upon PLC

commands. The robot and the PLC are connected to one another via

digital inputs and outputs to this end. The sample program is written in

Melfa Basic IV.

FMS-MachineAssembly

The FMS-MaschineAssembly.mod workcell simulates a Festo Didactic

FMS system. Four different processes can be executed. Depending upon

the process, a given workpiece holder is fed to the workcell on a

conveyor belt. The workpiece holder must be added to the model by

clicking the appropriate button. The following points outline the most

important new learning content included in this workcell:

•

Accurate teach-in of difficult to access positions

Collision-free path planning in very tight spaces

Control of the functional units included in an EMCO CNC milling

machine

•

Complex I/O communication

Initialisation of robot subprograms based upon sensor detection of

the type of workpiece fed to the system

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Press linking is accomplished by means of two type KUKA KR 125

industrial robots and a simulated S7 PLC in the PressAutomation.mod

workcell. In addition to communication with the PLC via digital inputs

and outputs, the work procedures of two robots must be synchronised

as an additional challenge in this case. The sample program is written in

IRL.

PressAutomation

RobWeld

This workcell simulates the actual Festo Didactic FMS welding station.

Welding is performed by a Kawasaki FS03N robot. The gripper system

consists of a pneumatic 3-finger gripper and a welding torch, which is

connected to the robot flange via a collision-shutdown device for safety

reasons. The task is to weld three raw metal components together into a

cylinder housing. This can be accomplished by means of spot welding or

path welding. The sample program is written in IRL, and executes a spot

welding sequence. A glass shield for the prevention of electro-

ophthalmia must be brought into position during welding for safety

reasons. The welding torch must be cleaned after welding.

TablePainting

A robot must paint the surface of a table with the help of a spray gun in

the TablePainting.mod workcell. This painting sequence can also be

simulated (see also chapter 5.5). As an initial exercise, you should first

test the painting sequence in teach-in mode in order to gain a bit of

experience with painting quality. The tool for automatic trajectory

generation can also be used in order to calculate the robot’s paths for

execution of the painting sequence (see also chapter 4.3). The effects of

the parameter settings must be determined in this case.

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CarPainting

The goal of the CarPainting.mod workcell is to paint a car hood. Due to

the fact that the hood is a freeform surface, it is very difficult to create a

painting sequence without the help of automatic trajectory generation.

Nevertheless, an attempt should be made to complete some of the

calculations with the help of teach-in points, in order to gain a better

understanding of the problem.

PCBMounting

The PCBMounting.mod workcell is highly demanding, and is well suited

for project work. It simulates a PCB production line which consists of 6

work stations:

•

Station for inserting ICs

Station for soldering ICs

Station with three robots which position the PCB holder

Station for assembling the PCB to the holder

Station for screwing the PCB to the holder

The individual robot programs must be created. Finally, master controls

must be developed which coordinate the individual actions.

PlantSimulation

The PlantSimulation.mod workcell simulates an entire production

facility that consists of several manufacturing cells:

•

The AGV workcell includes an automated guided vehicle system

(AGVS) that interconnects the individual manufacturing cells within

the entire production facility. The AGVS receives picking orders

which it fulfils autonomously. The workcell consists of the AGVS, a

robot and various workpiece carrier trays with sensors.

The Workshop workcell consists of two Mitsubishi robots, one of

which is mounted to an additional linear axis. The robots must

execute simple handling tasks in a work-order related fashion.

The Storage workcell controls automated warehousing. It is linked

to the AGVS by means of a conveyor belt.

•

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•

The Production workcell consists of a robot, an injection moulding

machine, a press, a laser labelling unit and a conveyor belt which

links it to the AGVS. A ventilator fan base is produced in this

workcell.

•

The ventilator fan base must be painted in the Paintshop workcell,

which consists of a robot, a rotary table, a gripper changeover

module for grippers with various paint spray guns for different

colours, and a conveyor belt which links it to the AGVS.

The individual parts of the ventilator are then assembled in the

Assembly workcell. This workcell consists of two robots and a

conveyor system.

•

The ventilator is inspected and packaged in the CheckPack workcell.

It consists of a robot, packaging materials and a conveyor belt which

links it to the AGVS.

The individual workcells are available as separate cell models, so that

each workcell can initially be processed alone. Integration can then be

accomplished in the form of a large project.

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After starting COSIMIREducational,youcan directly accessthe

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COSIMIR Assistant:

Figure 3.1: Graphic navigation in the library of workcells

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The COSIMIRhelpfunction issubdivided into threeparts:

3

.1

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COSIMIR Help

®

•

Online help for working with COSIMIR

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The COSIMIRRoboticsAssistant

®

COSIMIR Educationalwhich providesacomprehensive libraryof

predefined robotic workcells

The menu bar

The menu bar provides access to functions like those of a standard

Internet browser. You can scroll forwards and backwards. You can

display or hide the navigation bar. You can select a home page, as well

as other options for Internet connections. You can print out any selected

topics that serve your needs.

Figure 3.2: The menu bar

Additional index cards

You also have the option of conveniently navigating within the

®

COSIMIR helpfunction usingadditionalindex cards includingcontents,

index, search and favourites.

•

The Contents index card displays the entire contents of the

®

COSIMIR helpfunction inan explorer layout,which canbe

navigated just like the Microsoft explorer.

•

The Index displays all of the keywords used by the entire help

function, by means of which information can also be accessed.

The Search function facilitates full-text retrieval using all of the

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terms that occur within theentireCOSIMIRhelpfunction.

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You can create your own explorer structure for the COSIMIRhelp

function with the Favourites index card.

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Figure 3.3: Help function index cards

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The COSIMIRAssistantprovides youwithan onlinelearning

3

.2

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The COSIMIRAssistant

environment for robotics applications in the field of automation

technology. The assistant is subdivided into two parts:

®

•

The COSIMIRRoboticsAssistant

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COSIMIR Educational

•

The educational part provides you with a description of all of the robotic

workcells. All applications can be accessed directly via the graphic

navigator (see also chapter 2.3).

Figure 3.4: Start-up information dialogue box

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The dialogue box is opened by clicking the Start-up info function in the

Help menu. The graphic display of the robot model appears here under

the directory path used during installation. You can activate or

®

deactivate the display of this file eachtimeCOSIMIREducationalis

started. Acknowledge your setting with the OK button. You can also

select another directory path by clicking the Browse button, and display

it immediately using the Open file button, or select it as a start-up

information file.

®

Now it’s time to finally getstarted witha robotic workcell in COSIMIR.

You need only click the button shown in the screenshot on the left, and

®

the correspondingworkcellmodel is openedinCOSIMIR:

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Figure 3.5: Work-cell in COSIMIREducational

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The opened workcell includes a display of all of the windows that are

required for solving the assigned problem. If you chose not to install the

solutions during installation, the position list and the programming

window are empty, but they are set up such that you can begin work.

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The basic procedures for working withCOSIMIRaredescribed inthe

following pages.

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The COSIMIR

User Interface

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The most important windowtypesused in the COSIMIRuserinterface

3

.4

Window Types

are described below.

The Toolbar

Additional tools can be selected for inclusion in the toolbar with the

menu function Extras Settings Adjust. We recommend the

following tools in any case:

•

Collision detection

Model explorer

Project management

Renumber & sort

The Workcell Window

A graphic representation of the currently selected workcell is displayed

in the workcell window. Additional views can be opened in the workcell

window with the menu function View New, allowing you to observe

different perspectives simultaneously. The three dimensional

representation of the workcell is dependent upon the selected point of

view.

Click the button shown in the toolbar screenshot on the left (Ctrl + shift).

The mouse pointerappearsin the form of this button,andcanthenbe

used to enlarge or reduce the display by moving the mouse.

Click the button shown in the toolbar screenshot on the left (shift). The

mouse pointer appears in the formof thisbutton,andcan then beused

to move the display by moving the pointer along the coordinate axis.

The display can be rotated around the individual coordinate axes with

the help of this button (Ctrl).

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You can also select various predefined standard views. Use the menu

function View Standard to this end. A dialogue box appears which

includes various options:

•

Preset

(O)

(V)

(U)

(A)

(L)

Front view

Rear view

Top view

Left-hand side view

Right-hand side view(R)

The desired view appears after clicking one of the above options, as

long as the workcell window is open. This can also be accomplished by

simply activating the corresponding keyboard keys.

Joint Coordinates

Press the F7key or select the menu function Extras Robot position

Show joint coordinates.

The Joint coordinates window displays the individual positions of each

of the robot’s joints. Position is specified in degrees for rotary axes, and

in millimetres for linear axes. The Set joint coordinates dialogue box

can be accessed by double clicking this window.

World Coordinates

Activate the shift+F7key combination or select the menu function

Extras Robot position Show world coordinates.

The World coordinates window displays the position and orientation of

the TCP (tool centre point) in world coordinates. In addition to position

and orientation, the robot’s configuration appears in the bottommost

line in the window. The Set world coordinates dialogue box can be

accessed by double clicking this window:

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Teach-In

Activate the F8key or select the menu function Extras Teach-in. In

addition to the designations of the robot’s joints, the window that now

appears includes two small buttons which can be used to advance the

robot’s individual joints. The performance of a real robot is simulated

when these buttons are activated. The robot is accelerated to the preset

speed (override) if one of these buttons is pressed and held. The preset

speed is then held constant, and braking to a speed of 0 ensues when

the button is released, controlled by means of a acceleration ramp.

By clicking the corresponding option, teach-in can be performed using

world coordinates or tool coordinates.

Further details are included in chapter 4.1.

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Display Coordinate Systems

Various types of coordinates systems can be displayed for support.

Select the menu Extras Coordinate systems to this end (Ctrl + K):

•

Show tool centre point (The path of the TCP is recorded when this

option is selected.)

•

Show world coordinate system (coordinate axes are displayed in

colour)

•

Show basic coordinate system (robot coordinate system)

Show object coordinate system

Show gripping points

Inputs/Outputs

Press the F9key, activate the Ctrl+F9key combination or select the

menu function Extras Inputs/outputs Show inputs or Show

outputs.

The Inputs window shows which signals are being applied to the inputs

of the simulated controller. 0 signals are displayed in red, and 1 signals

in green. If the input signal is forced, this is indicated by the fact that the

input value appears in angle brackets, e.g. <1>. If the input is linked to

an output, the input value appears in brackets, e.g. [1]. the same

applies to output displays.

Controller Selection

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Select the menu function Execute Controller selection. COSIMIR

Educational includes workcells with several controllers, for example one

PLC and two robot controllers, which work together simultaneously in

the simulation mode. However, if a procedure is to be taught into a

robot, the teach panel must be first allocated to the desired robot. This

task is executed by the controller selection window. It is used to display

and select a master, and to activate and/or deactivate individual

controllers. The display of robot positions, the display of inputs and

outputs, and teach-in are only possible for the robot that has been

selected as a master.

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Robot Program

Click the menu function File Open and select the desired file type, i.e.

*

.MB4 (Melfa Basic IV), *.MRL (Movemaster Command) or *.IRL

(

industrial robot language). Or create a new program with the menu

function File New and select the desired window type, i.e. IRL

program, Movemaster Command program or MELFA BASIC IV program.

The screenshot shown on the left contains a robot program in high-level

language using the native language of the respective robot. The name

of the associated object is specified in the header.

Position List

Click the menu function File Open and select the desired file type, i.e.

*

.POS (for Mitsubishi robot) or *.PSL (for industrial robot language).

Alternatively, create a new position list with the menu function File

New and select the desired window type, i.e. MRL position list

(

Mitsubishi robot) or position list.

The screenshot shown on the left contains a position list for a robot. The

name of the associated object is specified in the header.

The New function in the File menu can also be accessed with the button

shown in the screenshot on the left, or with the Ctrl + N key

combination.

User Input/Output

The User Input/Output window appears automatically if the robot

program contains commands with which data can be read in or read out,

for example via the serial interface at the robot controller.

Due to the fact that the robot controller is only replicated in the

simulation, data are not transmitted via the serial interface, but rather

via the User Input/Output window.

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Camera Cruise

Camera cruise can be activated or deactivated with the menu function

Execute Camera cruise. The first toolbar button shown in the

screenshot on the left can be used to access this function as well.

When a simulation is started, movement is initialised to the stored

points of view, one after the other. Linear interpolation is utilised

between the views, assuring smooth motion from one to the next.

After clicking the menu function Extras Settings Camera cruise, a

dialogue box appears which allows you to store various views of your

workcell window:

Select the desired point of view for your workcell window and click the

Add button, in order to add the current view to the list. Existing views

can also be removed from the list. If you want to change the settings for

a view, select the respective view and click the Properties button:

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0

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. Working with COSIMIR

3

You can name the selected view, assign a dwell time and a zoom time,

and change the point of view manually.

Creating an Animation

You can create an animation of your simulation with the help of the

camera cruise function. The animation is saved as an AVI file. Trainees

can use this file for their own presentation purposes, or can submit it as

the result of their project.

To create an animation of your simulation:

1

.

Configure a camera cruise sequence and test it in combination with

your simulation.

2

.

In order to create an animation, start simulation and recording of the

camera cruise sequence with the second toolbar button shown in

the screenshot on the left.

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3

.

Recording is stopped by clicking the last toolbar button shown in the

screenshot on the left.

4

The animation can then be played back with the third button and

stopped with the last button.

It is advisable to configure the recording after completion, in order to

optimise the animation file:

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Details regarding configurationareincluded in the COSIMIRhelp

function under Advanced Camera cruise Configuring camera

cruise Settings dialogue box – Video. Further helpful support is

®

provided bythe Camera cruise video in the COSIMIRhelpfunction

under Examples Operating.

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. Programming

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The following programming languages can be used in COSIMIR

Educational for programming robots:

•

Mitsubishi MELFA Basic IV robot programming language

Mitsubishi MRL robot programming language

Standardised industrial robot language (IRL DIN 66312)

We have proceeded as follows in creating sample programs for the

models:

All Mitsubishi robots have been programmed using MELFA Basic IV, as

long as this language is supported by the respective controller. MRL has

been used for all other Mitsubishi robots. Other types of robots have

been programmed using IRL.

The “Robot Programming” section of the Robotics Assistant includes

comprehensive information regarding the programming of robots.

Details regarding the programming languages are contained in the

®

chapter entitled “Programming Languages” in the COSIMIRhelp

function.

4

.1

In order to create a robot program, certain positions must be defined to

which the robot travels under certain conditions. Generally speaking, a

robot can be advanced with the help of a manually operated control

Teach-In

®

panel inordertoteach suchpositions. COSIMIRprovidesuserswith

two different methods for advancing the robot manually:

•

With the mouse

•

In the teach-In window

Click in close proximity to the gripper end point with the left mouse key.

A voxel (pixel in 3D space) is marked at the clicked point. If you double

click the voxel, the robot moves to the selected point, if it lies within its

working range. The robot can be advanced in a much more targeted way

with the universal teach panel. The teach panel can be accessed via the

Teach-in function in the Extras menu (F8).

Select the “Joint coordinates” mode from the teach-in window.

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Figure 4.1: Teach panel with joint coordinates

Select one of the robots six joints and click one of the corresponding

arrow buttons: The robot moves around the selected joint in the

corresponding direction. Speed can be selected with the override slider.

After clicking the Set Joint coordinates button, a dialogue box appears

to which joint coordinate values can be explicitly entered.

The robot’s current position can be transferred to the respective

position list by clicking the Current Position Pos. List button.

The gripper can be closed by clicking the Close gripper button, after

which the button is renamed as Open gripper.

Select the “World coordinates” mode in the teach-in window in order to

move the robot within the Cartesian coordinate system:

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. Programming

Figure 4.2: Teach panel with world coordinates

The robot can be moved along the world coordinate axes, and the

gripper can be rotated around these axes by clicking the corresponding

®

arrow buttons. Further details are included intheCOSIMIRhelp

function under Operating How to ... How to move and position the

robot in COSIMIR.

Select the “Tool coordinates” mode in the teach-in window in order to

move the robot within the tool coordinate system. The tool coordinate

system is the robot’s basic coordinate system, but the zero point has

been shifted to the robot’s TCP.

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Figure 4.3: Teach panel with tool coordinates

As described above, the robot can be moved along the tool coordinate

axes and the gripper can be rotated around these axes by clicking the

corresponding arrow buttons. Note that the TCP remains unchanged.

How can this be double checked?

4

.2

This example necessitates the creation of a program for the Mitsubishi

RV-2AJ robot that solves the sample task posed in section 2.3 for the

First Steps workcell.

Example: Programming a

Workcell

Open the First Steps RV-2AJ workcell with the help of the graphic

navigator, or open the FirstSteps RV-2AJ.mod file (directory path:

.

..\Models\FirstSteps\Model) with the menu function File Open.

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. Programming

Figure 4.4: FirstSteps RV-2AJ.mod

Sample task

As a reminder, the blue workpiece must first be set onto the middle

section of the first pallet. After a waiting period of 2 seconds, it must

then be sorted into the bottom section of the second pallet.

Creating a position list

We’ve already created the sequence plan in chapter 2.3. Now we’ll need

to create a position list. First, delete the contents of the predefined MRL

position list and save it under the following new name:

“

FirstStepsTest.pos”.

•

Add the robot’s initial position as the first entry to the position list.

Click the Current Position Pos. List button in the teach-in window

to this end.

•

The second position (P2) is the gripping position for the blue

workpiece. A line in the position list is highlighted after clicking

underneath the first position. Click the Current Position Pos. List

button in the teach-in window once again. As an exercise, position

P2 will be edited manually. Select position entry P2 to this end.

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Figure 4.5: Position list entry

•

The Position list entry dialogue box can be accessed with the menu

function Edit Properties (Alt+Enter). Edit the displayed position

data as follows:

–

Positions (X, Y, Z)=(167.00, -185.00, 240.00)

Orientation (roll=A/P, pitch=B/R)=(-90.0, 180.0)

•

Move the robot to the new P2 position by double clicking the

position list entry.

Close the gripper by clicking the Close gripper button in the teach-in

window.

Use the world coordinate system in order to position the robot such

that the blue workpiece is set into the middle section of the first

pallet.

Tip

The coordinate axes can be displayed for improved orientation: Extras

Coordinate systems Show world coordinate system

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. Programming

Gripper settings

The gripper settings dialogue box can be opened with the menu

function Extras Settings Gripper.

Figure 4.6: Gripper settings

All outputs are included in the Teach-in gripper control drop-down list,

which are assigned to objects capable of executing gripping tasks. This

output is activated whenever you click the Close gripper button in the

teach-in window. You can also choose to have possible warnings

displayed for gripper operations.

Three dimensional

navigation

It is helpful to open a second workcell window to facilitate three

dimensional navigation (see also 3.4).

•

After moving to the desired position has been successfully

completed, add this position to the position list as point P3.

P4 is the final position in the second pallet.

•

Video (help function)

Videos entitled “Teach-In”, “Position list” and “Working with Positions”

®

are included in theCOSIMIRhelpfunction under Examples

Operating, which address the subjects of robot teach-in procedures and

working with the position list in the simulation.

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Creating the program

Click into the programming window in order to activate it. Delete its

contents and save it as a Melfa Basic IV program under the name of the

position list: “FirstStepsTest.mb4”. The names of the program and the

associated position list must be identical!!!

The MELFA Basic IV programming language is a dialect of Basic, and

each program line must thus be numbered. However, numbering has

been automated. First create the program lines without any numbering.

Now click the button shown in the toolbar screenshot on the left (Extras

Settings Renumber).

Implement the sequence plan from chapter 2.3 step by step in order to

create the program.

Sequence Plan

The robot’s gripper is open.

10 HOPEN 1

The robot moves the gripper to the gripping position with a PTP movement.

The gripper is closed.

20 MOV P2

30 HCLOSE 1

40 MOV P3

50 HOPEN 1

60 MVS P3,-40

70 DLY 2

The robot moves the gripper to the intermediate position with a PTP movement.

The gripper is opened.

The robot executes linear travel back to a point above the intermediate position.

2

second waiting period

The robot moves the gripper to the intermediate position (linear travel).

The gripper is closed.

80 MVS P3

90 HCLOSE 1

1

00 MOV P4,-40

10 MVS P4

20 HOPEN 1

30 MOV P1

40 END

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Note

Add an empty line at the end of the program!

For assistance during programming, execute a right click inside the

programming window. You are then provided with a list of the most

important function calls, and the corresponding function commands are

edited in the programming window via mouse click.

Comprehensive, structured documentation of all Melfa Basic IV

programming commands can be accessed in the Robotics Assistant

under Programming robots Robot programs Basic course. Save

your program after it has been completed.

Melfa Basic IV Project

Before compiling your program for the first time, you’ll have to create a

project. The project includes all of the associated programs and their

respective position lists. Select the Project management function in the

Execute menu, or click the

button shown in the toolbar screenshot on the left.

The following project management configuration window appears:

Figure 4.7: Project management

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In order to create a new project, select the MELFA-BASIC IV projects

entry and click Add project in the context menu.

Figure 4.8: Project entry

Enter a project name and acknowledge your entry with the Open button.

Select the Files register card and click the button shown in the

screenshot on the left. You are then prompted to open the program file.

The project name then appears in the right hand portion of the project

management window. Click the empty entry at the bottom, and the

corresponding line is selected. Now add the associated position list by

selecting the “MELFA BASIC IV position list (*.POS)” file type in the file

selection window.

Due to the fact that a multitasking system is utilised, you’ll have to

establish which program is the main program. In this example, your

program is of course the main program. Select your program entry in the

project management window to this end, and select Main program from

the Compiler mode properties drop-down list.

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. Programming

Figure 4.9: Creating a new project

Now, activate your project. Select your project entry and click Set as

Active Project in the context menu. Acknowledge your project entry by

clicking the OK button.

You can now download your project to the internal robot controller.

Activate the program window and click the Compile & link function in

the Execute menu (Ctrl+F9), or click the button shown in the screenshot

on the left.

Utilised program and system modules, as well as the number of errors

and warnings, appear in the Messages window.

If error messages appear, the corresponding program line can be

highlighted in the program window by double clicking the respective

error message.

Caution!

As a result of cause and effect, it is entirely possible that a different line

will be highlighted which appears underneath the actually faulty

program line.

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If program syntax is error-free, you can start analysing the program

sequence with the help of the simulation function.

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This advanced COSIMIRfunctionforautomatic,surfaceoriented

4

.3

Automatic Path

Generation

trajectory generation provides programmers of robots used for coating

and deburring tasks with support by automatically generating robot

paths, and the corresponding robot programs. Time involved in offline

robot programming can thus be minimised, and process results can be

optimised at the same time.

A table must be painted by a robot in the “Table Painting” sample

workcell. You can create the required trajectories by means of suitable

teach-in positions, or you can use the trajectory generating tool. In this

example, “Table” must be selected from the object folder in the model

explorer (see also 6.3), after which trajectory generation is started with

the menu function Execute Surface trajectories.

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. Programming

Figure 4.10: Surface trajectory generation

The dialogue box shown above is opened before automatic generation

of the paths’ intermediate positions. Additional parameters can be

entered here, in order to optimise the generating process.

A comprehensive representation of this method is included in the

®

COSIMIR helpfunction under Extensions Surfaceoriented

trajectory generation. In addition to this, a video dealing with actual

use of this method can be found under Examples Operating.

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4

.4

All of the programs you create in the Movemaster Command or MELFA

Basic IV languages can be downloaded to a Mitsubishi controller via

Download to the

Mitsubishi Robot

Controller

®

COSIMIR Industrialor COSIMIRProfessional.Openanew projectin

®

COSIMIR tothis end withthe Newproject function in the Filemenu,

select the appropriate robot and set up the communications link. Open

®

your program and your position list, and resave the files to COSIMIR

®

Industrial or COSIMIRProfessional!Establish communication withthe

robot and download the robot program and the position list.

Caution!

Execute the following tests before starting the program after it has been

successfully downloaded:

•

Are all teach-in points correct?

Have all inputs and outputs been correctly wired?

Has the TCP been set correctly?

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5

. Simulation

The simulation of programs that have been written offline using

®

COSIMIR isdescribed in the followingpages.

5

.1

Use the menu function Execute Simulation for configuration.

Settings

Simulation

The simulation rate determines how frequently the graphic

representation is refreshed. The motion display becomes smoother, but

also slower, as the selected value for the simulation rate is reduced.

The control rate is used to calculate intermediate positions for robot

controllers, and serves as a cycle time for stored program controllers.

The control rate determines the various possible simulation rate

settings.

If you have selected the Real-time option, the simulation rate is

adjusted automatically. In the event of inadequate PC performance

characteristics, a real-time link may not be possible, resulting in a

continuous increase of the simulation rate. This effect can be limited by

specifying a Maximum simulation rate. The Control parameters option

is only available if the Real-time checkbox has been activated. This

parameter establishes which constant is utilised to control the

relationship between simulation time and real-time.

5

.2

Open the First Steps RV-2AJ workcell with the First Steps Test project

from the proceeding chapter. Start the simulation with the Start

function in the Execute menu, or click the button shown in the toolbar

screenshot on the left. The program is simulated step by step.

Simulation time is displayed in the Status line. The program line that is

currently being simulated is highlighted in the program window. At first,

you can execute each program step individually with the help of the

button shown in the toolbar screenshot on the left.

Example:

Workcell Simulation

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5

. Simulation

If you want to start a new simulation cycle, it is advisable to return the

robotic workcell to its initial position. Use the menu function Edit

Reset Workcell to this end.

Simulation serves to check your program for two important criteria:

•

Is the functional sequence correct?

Can run time be further optimised?

•

We’ll concentrate here on the first question, i.e.

•

Is the logical sequence correct?

Are there any collisions?

•

You should be able to answer the first question on your own.

Collision detection

Example

As regards collision detection, you should first decide which

components are to be examined for possible collisions.

Consider our sample program to this end. The first critical point is

certainly the transfer of the blue workpiece to the first pallet. The task in

this case is to specify that these two objects will be examined for

possible collision.

Use the menu function Extras Settings Collision detection to this

end. Click the Selection index card

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5

. Simulation

Figure 5.1: Object selection for collision detection

The index card displays a list of all of the objects included in the

workcell. Box3 is the blue workpiece. Select Box3 and Pallet1.Pallet as

you would in the Windows explorer. Select the Selected objects against

each other option, in order to determine whether or not the selected

objects collide with each other.

Click the button shown in the toolbar screenshot on the left in order to

activate collision detection, or select the Collision detection function in

the Execute menu. Start the simulation once again. Notice that the blue

workpiece turns red during transfer before it is set down onto the first

pallet. This indicates that a collision has occurred. This collision

persists, because the workpiece is set down onto the pallet. How can

we eliminate this collision before the workpiece is set down?

Recommended solution: Replace line 40 with the following:

4

0 MVS P2,-30

1 MOV P3,-30

2 MVS P3

For a more detailed visualisation of collision detection use your sample

program in the slightly modified NextSteps RV-2AJ.mod workcell, and

test for collisions with the glass plate.

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Video (help function)

A video that demonstrates how to set up the collision detection function

®

is includedinthe COSIMIRhelpfunction under Examples

Operating.

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5

.3

The sensor simulation functions expand the capabilities of COSIMIR

Sensor Simulation

such that complete robotic workcells can be simulated. Many of the

sensors utilised in manufacturing automation can be realistically

configured and simulated. Visualisation of sensor measuring ranges,

which is not possible in real applications, provides additional help in

avoiding design errors during the planning stages. Sensors are utilised

®

in numerous workcells, for example intheMPSRobotStation,for

detecting objects and materials. The characteristics of these sensors

can be analysed with the model explorer (see also chapter 6.3).

®

The COSIMIRS7simulator interpretsexecutable S7programs.Each

5

.4

PLC simulation

workcell may include several stored program controllers. Each PLC is

controlled by an S7 program. It is not possible to change the S7

®

program furnishedwithCOSIMIREducational.

An overview of the S7 controllers and the installed S7 programs can be

accessed with the S7 Program Manager function in the Execute menu.

Presented in a clear-cut tree structure, the S7 program administration

window displays the name and elucidates the structure of the PLC

programs that have been installed to each of the controllers within the

selected workcell. Programs may consist of the following elements:

•

Organisational modules

Function modules

Data modules

Functions

System functions

The contents of each type of element can be displayed by double

clicking the respective element.

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5

. Simulation

Your S7 programs can be displayed in the STL programming language.

All modules, organisational modules, function modules and functions

are displayed in tabular form. Modules that cannot be represented in

STL syntax are excluded, for example system functions and system

function modules.

®

Further detailsareincludedinthe COSIMIRhelpfunctionunder

Programming S7 simulator.

5

.5

Process simulations for coating and deburring operations make it

possible for robotics programmers to optimise the manufacturing

sequence at an early stage during program creation and, at the same

time, qualitatively evaluate processing results. This eliminates the

necessity for time consuming testing of motion sequences with test

objects, and the expense of offline programming is minimised while

improving process results.

Process Simulation

Process simulation is used, for example, in the Table Painting sample

workcell. In order to activate process simulation, select the desired

object from the model explorer (see also chapter 6.3), and start

simulation with the Process simulation function in the Execute menu.

Figure 5.2: Process simulation settings

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. Simulation

You are provided with the opportunity of configuring additional

parameters for simulating the painting process.

The program can then be started, and you can observe the painting

process at the same time.

®

A video entitled “Process Simulation”isincluded in the COSIMIRhelp

Video (help function)

function under Examples Operating, which provides you with

application support.

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8

2

6. Modelling

®

Although new workcells cannot be saved to COSIMIREducational,you

are provided with numerous modelling functions within the workcells

that allow you to change layouts, and to analyse alternatively

configured problems.

®

Various tools are made availablebyCOSIMIRformodellingrobot

controlled workcells, for example model libraries and the model

explorer. We’ll help you get acquainted with the modelling function

using the example provided in the chapter on programming.

®

The following types of elements areincludedin the COSIMIRmodel

6

.1

Model Hierarchy

hierarchy:

Objects

Objects are at the top of the model hierarchy.

•

Example: A robot is an object.

Groups

Groups are assigned to objects. Each group may enjoy a given degree of

freedom, and can thus be moved relative to the previous group.

•

Example: A robot joint is a group.

Components

Components are assigned to groups and determine the graphic

representation.

•

Example: Surfaces, cuboids and polyhedrons are components.

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Gripper Points

A gripper point is assigned to a group included in the gripping object, so

that one object can grip another.

•

Example: A gripper point is located on the flange of a robot’s sixth

axis.

Gripping Points

A gripping point is assigned to a group included in the object to be

gripped, so that one object can be gripped by another.

•

Example: A workpiece that is gripped has a gripping point.

®

6

.2

COSIMIR includescomprehensive modellibraries,some ofwhichare

optional. Objects or model components can be added to a workcell from

these libraries.

Model Libraries

Click the menu function Execute Model Libraries, or the button

shown in the toolbar screenshot on the left.

The following model libraries are available:

•

ABB robots

Fanuc robots

KUKA robots

Mitsubishi robots

Reis robots

Stäubli robots

Siemens S5/S7 SPC

Various grippers

Various basic forms

Various LEDs

Various materials

Various mechanisms

Various robots

Various sensors

Various controllers

Various textures

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. Modelling

6

.3

All of the elements included in a workcell can be accessed via the model

explorer. In addition to objects and their subordinate elements, this also

applies to materials, libraries, illumination settings and all I/O

connections.

The Model Explorer

The model explorer is opened by clicking the menu function Execute

Model Explorer (Ctrl+T), or the button shown in the toolbar screenshot

on the left.

Figure 6.1: Model Explorer

The model explorer window is subdivided into two sections:

A tree structure used for navigation appears in the left-hand section

including folders for the individual workcell elements.

The element list included in the right-hand side of the window displays

the elements included in the folder that has been selected in the tree

structure. Elements can be accessed by clicking the desired element in

the tree structure (if it appears there), or in the element list.

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An element selection context menu containing the most important

commands can be displayed by double clicking an element or an

element folder.

The Objects folder contains all of the workcells components. We make

reference to this folder name in the workcells function descriptions.

Example

Solution

You want to determine the exact position of the green workpiece in the

First Steps workcell expressed in world coordinates.

1. ActivatetheeditingmodeusingtheEditmode function inthe

Execute menu (Ctrl + E), and open the model explorer. Click the

green workpiece. The object is then selected and the associated

object coordinate system is displayed. The “Objects” file is selected

in the tree structure, as well as the appropriate component, i.e.

“

Box2”, in the display window. The desired allocation has now been

established.

2

.

Click the “Box2” object in the tree structure and select Properties

from the context menu. The Object properties dialog box appears,

from which the Position index card must now be selected.

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. Modelling

Figure 6.2: Object properties

The Cartesian coordinates of the zero point from the object coordinate

system are displayed here, as well as the orientation of the object

relative to the world coordinate system (roll: rotation around the Z-axis,

pitch: rotation around the Y-axis, yaw: rotation around the X-axis).

Changing object properties

We want to expand our sample task by requiring that the cell is changed

such that the green workpiece is approximately at the centre of the

table, turned 45° relative to the world coordinate system:

Solution

1. Thedisplay of Cartesian coordinates and orientation values inthe

Object properties dialogue box can be directly overwritten, or you

can change the displayed values using the arrow buttons in steps

according to the selected increment. The workpiece is immediately

moved to its new position.

2

.

Change the Y coordinate and the roll angle accordingly.

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The Object properties dialogue box includes additional parameters that

are contained in the General, Dimension, Visualisation index cards etc.

Except for display colour, it is not possible to change these additional

Note

®

object propertieswith COSIMIREducational.

Library elements

Objects in a workcell can also be grouped together as library elements.

The goal is to assure that the included objects are always arranged in a

fixed geometric constellation in relation to one another. Library

elements are recognised by means of their designation. Library

elements always have two-part names:

Library_name.Object_name

Example: (First Steps workcell): Pallet1.Pallet

Only the properties of the corresponding library element can be

changed. For example, if you want to change the position of the first

pallet, you must click the “Pallet1” object in the Library folder included

in the tree structure, and open the Properties dialogue box from the

context menu.

®

Video (help function)

A video entitled “Working with Objects” is included in the COSIMIR

help function under Examples Operating, which explains how to

work with objects in the model explorer.

I/O connections

After clicking I/O connections in the tree structure, an overview of all

input-output assignments is displayed, and the designation of the

associated object is shown for each input and output.

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. Modelling

Figure 6.3: List of I/O connections

This overview is also included in the documentation for the workcell.

You would also like to know which input bit is allocated to the symbolic

®

“Part_AV” input attherobot controllerinthe “MPSRobotStation.mod”

workcell.

Solution

Open the folder for the RV-2AJ object and select the inputs subfolder. All

input bits are then displayed in the right-hand window.

You can now see that the input in question is allocated to input

bit no. 8.

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6

.4

In chapter 6.3 you learned how to change object properties, enabling

you to easily modify the workcell layout.

Example: Modelling

in a Workcell

There are numerous other possibilities of remodelling your workcell in a

®

sensible fashionin COSIMIREducational.

Illumination

You wish to change the illumination in the graphic representation.

Illumination consists of ambient light and up to 7 additional light

sources. Open the Illumination folder and select the “Ambient light”

object. Open the properties dialogue box from the context menu. The

intensity and colour of the light can be changed.

You wish to find out which light sources are turned on in the sample

workcell, and what effect they have on the workcell.

Select, for example, light source 1 with a left click. The orientation of the

light source is graphically represented in the workcell window by means

of a light beam, and the associated object properties window is opened.

Light sources can be turned on and off, and their orientation, intensity

and colour can be changed.

Robot selection

You want to replace the robot in a given workcell with a different robot,

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for example you would like to replace the RV-2AJ robot in the MPS

Robot Station with the 6-axis Mitsubishi RV-1A robot. Open the model

explorer and select the name of the respective workcell,

“

RobotStation”. Open the properties dialogue box via the context menu

and select the libraries index card:

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6

. Modelling

Figure 6.4: Work-cell properties

Select the “Exchange active robot” option. A line appears at the bottom

prompting you to acknowledge the change. Select “Yes” and then close

the dialogue box. Now open the model library dialogue box and select

the RV-1A from the Mitsubishi robots folder. Add this robot to the

process model. A dialogue box appears indicating that the operation

cannot be undone. Acknowledge with “Yes”. The old robot is now

replaced with the new one, and all I/O connections are updated as well.

Note

The name of the robot listed in the model explorer remains unchanged

(

RV-2AJ)! Don’t forget that all teach-in points must be updated.

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Importing new

components

Task

You want to set up a partition between the two pallets in the First Steps

workcell, in order to demonstrate a collision problem.

Solution

The model library does not include a partition, but the Next Steps

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workcell does. Open the Next Steps workcell withCOSIMIRIndustrial

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or COSIMIRProfessionaland select the “Wall” component inthe

model explorer from the workcell’s object folder. Save the object as

wall.mod via the context menu. This file can now be imported to any

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workcell in COSIMIREducationalwiththehelpof the menufunction

File Import.

Gripping point

Create a rectangular workpiece with a side length of 45 mm in

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COSIMIR Industrialor COSIMIRProfessional.OpentheFirstSteps

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workcell in COSIMIREducationaland importthe newcomponent

named “Box4”. Position the component at the centre of the table. Teach

the robot to grasp the new workpiece. What happens? Select the menu

function Extras Settings Grip for troubleshooting assistance. Then

select the “Gripper warnings” option in the configuration window.

A warning now appears when the gripper is closed: “No object”. Why

does this warning appear?

Solution

Compare the structure of the Box3 and Box4 workpieces in the model

explorer. As you can see, Box4 does not have a gripping point, which

means that the gripper does not recognise it as a graspable object.

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Proceed as follows in order to create a gripping point:

1.

2.

3.

4.

Select the Basic subfolder for the Box4 object.

Select New and Gripping point from the context menu.

A gripping point appears in the right-hand window.

Select the gripping point and open the properties dialogue box from

the context menu.

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Select the object coordinate system and position the gripping point

at the centre of the workpiece.

A gripping point range can then be created in the “General” index

card.

In addition to this, you can import any of the workcells and elements

included in the model library. However, you must keep in mind that

existing I/O connections are not imported. You’ll have to set up the I/O

connections again after import. This process can be easily elucidated:

Creating I/O connections

Open the BP70 workcell and the model explorer. Select the SimuBox

object and the inputs subfolder in the LED_0 object for the SimuBox. A

display appears in the right window indicating that the “On” input is

connected to the “OUT0” output. Click the “On” input and select the

function Edit Remove Connection in the context menu.

Task

Connect the “On” input at LED_0 to the “OUT0” output at the robot

controller.

Solution

Position the mouse pointer at the “On” input for LED_0 in the display

window. Press and hold the left mouse key. Move the mouse pointer to

the “OUT0” output at the robot controller in the navigation window of

the model explorer, and then release the key (connect by means of drag

and drop). The connection to the selected output appears in the display

window.

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