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Loci in Epicyclic gearing A4m




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 (11/30)r to get a square locus of straight side for the center of the pin.

This produces a smoother indexing motion of the orange Geneva disk rotates because the driving pin moves on a noncircular path, unlike in standard Geneva mechanism.




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