dyrodium
Experienced Roboteer
Joined: 24 Aug 2004
Posts: 6476
Location: Sydney
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First step is to work out how fast the motor / gearmotor is spinning already you could probably do this with your camera gear if you can get a high enough framerate, using a bit of black tape or disk with a dot.
Spur gears are dead simple to work out ratios, double the teeth = double the reduction. Planetary and others are harder to work out, for a crazy high reduction consider a hypocycloid they're pretty damn cool. http://www.thingiverse.com/thing:19649 There's a few on thingiverse, no idea if they're any good though! You could easily get 2rpm with one and a stepper motor + driver + arduino. _________________ ( •_•)
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YEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAH
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