How to size a rack-and-pinion system for a precision motion axis

Nov 20, 2019

Rack-and-pinion mechanisms include a circular gear (the pinion) typically made of steel with equally spaced teeth. This pinion engages a linear gear (the rack) to convert rotational motion into translational motion. A servomotor directly drives the pinion to either cause the servomotor-pinion assembly (and attached loads) to travel along the rack or (less commonly) to cause the rack (and attached loads) to advance and retract.

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