Hello,

I'm new in modeling with mathmodelica and I have some big questions. It would be very nice if somebody could help me.
I want to model and then to simulate parts of a palettiser for university with modelica. But I didn't succeed in doing it. For exemple when I try to model the conveyor belt, with a motor, sensors to stop and to start the band, …..
It is possible to model this? Exist another way to simulate it, like " a real simulation" not only in "courbs".

Another movement could be" take a box , turn it and then put it on a palette", can I make this with mathmodelica and the free library?

Sorry these are bad questions, but...

Hello Feu,

did you achieve some improvements with modelling your palette transporting system?

A few month back I tried to model a similar system and I didn't get a satisfactory solution. Part of this I've posted in this forum (model socket.mo) in post Dynamic simulations with Dymola/OpenModelica?, How to realize simulations which react on user input?. Just ignore the control and communication subpackages and you have a two conveyor plant with two workpieces.

The basic problems I experienced are the following:

- it is not possible to generate or to destroy workpieces during simulation runtime (i.e. having a varying number of equations)
- how to model if a workpiece is inbetween two conveyor belts and the belts are not running at exactly the same speed?
- how to model that workpieces influence each other (e.g. if they are lying on a stack)?
- to find an easy way to interconnect the models without having hundreds of parameters to set

I'm quite sure, except generating and destroying workpieces everything, such a system can be modelled with Modelica if one invests enough work and time. How much work and time, I don't know. Since it was not an important project for me I quit working on it. But it would be interesting if you found some workarounds for the problems I've stated above and post them here.

Regards

Florian