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Geneva Wheel Geometry

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Published on Jul 14, 2011

Given values:
a = drive crank radius
n = driven slot quantity
p = drive pin diameter
t = allowed clearance

Calculations:
c = center distance = a / sin(180 / n)
b = Geneva wheel radius = √ c² - a²
s = slot center length = (a + b) - c
w = slot width = p + t
y = stop arc radius = a - ( p 1.5 )
z = stop disc radius = y - t
v = clearance arc = bz / a

Adapted from: Walsh, Ronald A. Handbook of Machining and Metalworking Calculations. McGraw-Hill Professional, 2009.

Music: Buxtehude - Canzona in G major, performed by Harald Vogel.

Animation created in Autodesk Inventor 2012 Professional.

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