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Old 05-20-2019, 08:46 AM
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jay_bob jay_bob is offline
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Join Date: Oct 2011
Location: Columbia, SC
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Actually more likely a bad controller. The motors are generic dc motors (series wound with brushes and a commutator) and these are reversed by flipping the polarity of the applied voltage. This is typically done with an “H-bridge” circuit. (Google it). If one of the switching elements in the H bridge is bad then you will get motion in one direction but not the other.

If the motor was bad it would not move in either direction.
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