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Stepper and 'home' sensor. | by Audin
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Stepper and 'home' sensor.

There is a preexisting hole in the motor shaft near the bottom. It will hold a piece of wire to trigger the IR sensor during the 'home search'. the home search takes a maximum of 5 seconds on startup, due to having to pause 25ms at each of 400 possible positions to wait for the sensor to detect the wire.

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Taken on November 8, 2009