Quote:
Originally Posted by Chris_Ely
You have a really long wire run between the battery and the PDB. This will cause a significant voltage drop under load. You should keep your wire runs as short as possible. This may or may not be causing the twitchy motor issue, but it could cause problems for you in the future.
Can you post a driver station log of the battery voltage for when the twitching occurs?
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Line resistance on a 5ft line of 22AWG PWM signal wire is about 0.08 ohms, and considering OP's cables don't even look that long, line resistance is most likely not a factor here. OP, If those are custom made cables, I'd suggest you check your terminals for faulty crimps. It's easy to mess those up. Also, try adding in your CAN runs between the PCM, rRio and PDP. It's far-fetched, especially considering the rRIO has little more than a terminating resistor for the CAN line, but I wonder if this could be a factor. Also, your breaker power runs are ridiculously long, try cutting those down, a lot.