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Originally Posted by jpsaul7usa
This is going to make me sound like a dunce, but what are rack and pinion?
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A rack is basically a gear with infinite radius. It's a straight line of teeth standing up. The pinion is the gear that meshes with the rack. By turning the pinion, you can move the rack along its length. Its a method for converting rotational to linear motion.
I think this robot brings the count of known holonomic drives this year to 4: 1257, 1002, 1212, and 1083