There is a chain that goes down from behind the geneva wheel to drive the big sprockets on the right side of the conveyor. You can just see it behind the conveyor starting at 0:10 in the video.
I could send you a copy of the 3D model (originally in Blender, but I can export to any standard format) if he'd like to poke at it.
Fun engineering tidbit for him: All of the rest of the connections are rollerchain, but the motor drives the geneva cam via belt and pulleys instead. That way if something gets jammed, it can slip instead of tearing itself apart!
I'd love to see a picture of his creation, when it's done.
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I could send you a copy of the 3D model (originally in Blender, but I can export to any standard format) if he'd like to poke at it.
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I'd love to see a picture of his creation, when it's done.