I was trying to make this cvt belt animation but can't figure it out how to make increase or decrease belt size animation I have tried curves but doesn't work.
Any body can recommend how I can I do a belt animation like this
The changes in a CVT belt ratio can be simulated using softbodies in Blender.
It take 2 steps to animate the belt size change. First the belt needs to be fit to the pulleys. Then the pulley size can be animated with the belt keeping fit.