Hi giorgos.ele,
Please try this file. If you have the set up of the conveyor “belt” visible on the end is not important, this will work. If you place other elements into your scene for visuals is up to you.
I have reduced the scene to the bare minimum, as I would expect to get it. To move all the stuff that is even “checked off” but folded, etc is extra work and needs attention. For your “bug hunting in the future, make a copy of your scene, delete anything that is not needed, and focus on the element that have worked in the past. Cloth and Dynamics is not a promising combination.
Some hints:
When you set up a scene, focus on the core elements first. Light, texture and such is not important during a dynamic set up, certainly not as long it doesn’t work. It feels like progress, but it slows only down.
The next suggestion I like to make, is based on the Dynamic itself, I found some settings that indicate that there might be a need to dive a little bit more into the parameter and their functions. The “Shape”, see image—is a core element to make animated scenes work. To know what it does is critical. The Automatic can’t know that it should provide something for the animation, perhaps someone doesn’t want it, and the automatic would use the most CPU intense version, just because something is moving…
Set your Editor view>Display> Gouraud Shading (Lines), and check the speed of your parts. They are different to each other.
Your point 1, please don’t worry at all about that. If I don’t get your point, I will ask.
The next point (2) is certainly difficult for me, with out any scene file, but before you send one, check back with the support! Thanks. They should get this problem directly and can take actions.
http://www.maxon.net/support/support-questions.html
All the best
Sassi