Dear Friends,

In my assembly i have a CAM constraint.

I made sure the cam is a nice smooth surface.

When i move the assembly in the model view all is fine.

But when creating an animation the cam is unstable. The follower is jumping arround.

My model is confidential, but on youtube i found the exact same problem:

Solidworks motion tutorial Cam and Spring Animation - YouTube 

Forward to 32:00 to see the behavior, the follower jumps through the cam:

How can i solve this problem?

The cam constrained seems to skip orientation at chance..

Any hints or help will be appreciated!

Best regards,

Paul