Quote:
Originally Posted by NotInControl
The fastest way to run through the circuits, is to pull all of the breakers on the power distro board. Also unplug power to your digital side card, analog, and solenoid card. Turn the robot on, and check continuity between the frame and the PD board.
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Removing the breakers probably won't work in this situation. The breakers are single-pole on (AFAIK) the high side of the circuit. Since they are reading a delta 12v between battery positive terminal and frame, it means the robot chassis is shorted to battery negative terminal somewhere. If a RS775 is case shorted, removing the breaker won't show the problem.
I would check first to make sure cRIO is isolated, then check to make sure the camera is isolated, then physically disconnect both wires leading to every RS775 (one at a time) from the M+/M- side of the speed controller, then check any custom sensors (such as Sharp IR sensors), as these in that order are the most likely causes of grounded frames.