Bad MiniCIMs... failing to consistently start?

[Michael Corsetto]

Originally Posted by ThaddeusMaximus

Some background on the motors:
The wheels attached have been running as flywheels on a shooter, direct output. A 1/2" hex output shaft was press-fit onto the end of the CIM shaft. The setup is very quiet, but beforehand they were run through a bunch of adapters that resulted in a very messy and rumbly situation.

This is likely your issue. I would not recommend placing wheels with axial or radial loads directly on the motor output shaft via an adapter. The motor output shaft is not designed to handle these sorts of loads. You should really be running a simple belt, gear or chain system to a separate shaft that has your shooter wheel on it and is well supported by the proper bearings/bushings.

I am guessing your set up is slowly but surely causing your motors to fail. I agree with others that brushes seem to be at least part of the failure mode.

Pictures would help too.

Best of luck!

-Mike