CIM motor gearbox clicking

I’m trying to run the drivetrain on my robot but the left side just clicks whenever I try to run the motor. Eventually, it moves for a little bit and gets stuck again. If you look closely, motor 3 jerks when that clicking happens. Does anyone know what the issue is?
Here’s a video: https://drive.google.com/file/d/1eFodPjNDleqTRYNEL5FE7w9bZTjIoNcV/view?usp=drivesdk

Obvious ones:

  • With power off, spin the wheels. Do they move smoothly?
  • Pull the motors out of the gearbox. Do all of them spin in the same direction?
2 Likes

My money is on motors fighting each other.

Motors Fighting -115
Something in code +200
Something jamming the Gearbox +350

Place your bets

11 Likes

I’d be thinking a key fell out and is bouncing around. When you hand-spin the wheels, have someone listening to the gearbox for rattling.

Motors fighting each other is also a decent option, but they don’t suddenly start working together then start fighting again, in my experience.

1 Like

Option 3

Also might be one just not turning at the right speed (code/motor problem)