Thank you for your answer.

Hello,
I have two cam plates with two cam rollers that move up and down in a tandem drive with pistons.
One loading piston and one working piston.
I have generated the CAD data in Freecad version 0.19. Various data exchange formats are available there, e.g. 3D-Step AP214.

In this PDF you can see on page 4 what I need:
http://ijmcr.com/wp-content/uploads/201 … 1-2151.pdf

And here is an animation that was created with Keyshot:
https://www.youtube.com/watch?v=IpjlMcF4lJc
https://www.youtube.com/watch?v=jqBxJZqurTs

Who can explain to me how to import AP214 step data into Open Modelica 3D and use constraints to connect the cam plate to the cam rollers to derive a 3D simutation, with motion diagram?
Is there a tutorial or a similar project I can learn from?

Many thanks for your help and best regards

Wilfried