belt does not return
how can I return
rotate the belt
If you want to rotate/move the belt along the pulleys then you need to model the belt like a chain.
BTW why you want the belt to be moving. If you're looking to move the pulley via this belt then use may look at the belt/chain option in assembly OR even use gear/pulley mate. This way the pulley will be moving but belt will be stationary (which is more recommended).
Check these videos
I came accross a very interesting website with more info on this product: http://www.directindustry.com/industrial-manufacturer/timing-belt-64818.html
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