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Re: one side of robot not running - and need general electronics troubleshooting advi
Since you're seeing the "fast" motor change from one side of the robot to the other when you swap PWM connections, I don't see how it could be motor bias.
How does your program send values to the drive motors? If you're using tank-style control, is one of your joysticks perhaps giving less range than the other? If you're using arcade-style control, is there a slight offset from zero in the steering axis?
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