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Originally Posted by gshosford
When we moved the joystick to the opposite extreme, the motor that had been the faster of the two became the slower of the two and the one that had been the slower of the two became the faster of the two. The observations are qualitative, but there were significant differences between CW and CCW motor speeds.
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Where they both faster going 'forward' on your robot? most bots have the motors mounted so one is running cw and the other is ccw when the bot goes forward.
I wonder if its the motors that are biased, or your drivetrain. If both sides run faster in the bot-forward direction, I would say its your drivetrain.
also, it would really help to measure wheel RPMs. Basing your estimate of speed on how the drivetrain sounds can be very misleading.