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Loci in Epicyclic gearing A4mb




R: pitch diameter of the fixed sun gear

r: pitch diameter of the planetary gear

k = R/r = 4

Distance between the pin axis and the gear axis of the planetary gear is (5/3)r to get a appropriate loop locus for the center of the pin.

This produces a smoother indexing motion of the orange Geneva disk because the driving pin moves on a nearly circular curve, center of which is the rotation center of the Geneva disk.




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