I made this machine in my garage. Not really it is made with a old blend I pulled out to look at and got side tracked. It is just for fun.
The 2 blue gears lower middle and conveyer belt is key framed because I could not find a constraint to pause and go.
Some day when I have time I will fix the animation and textures and composite and stuff.
The worm gear is keyed framed and every gear after is driven off the gear before.