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This spreadsheet calculates the rotation rate based on bending radius, rod pitch, gear teeth numbers...
To have the 1 rotation per minute of the bigger gear for your mechanical design, you actually need 7.145" bending radius... Not that this is too important in case of uP driver.
The motor (driving smaller gear, 16 teeth) will have to rotate at 4 rot/minute.
EDIT:
excel spreadsheet updated for reverse calculation (from motor speed to rod bending radius)
Last edited by bojan; 14-10-2010 at 02:45 PM.
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