Originally Posted by Taylor
We'd been driving our robot around yesterday when we noticed a couple wheels would stop spinning intermittently.
We had this issue last year:
Put two washers between the CIM motor and the Nano gearbox. That fixed it for us, I remember.
Also check this bearing, make sure it is not tilting the CIM one way. If so, change bearing to flush bearing or use the washers to space the CIM out.