I received the redbot kit as a gift. I’m starting to put it together and have a question about one of the motors. The shaft for one of the motors slides in and out if you press on it . When I was putting the encoder magnet on the shaft, it will depress into the motor about 1/8" or more, and when I let go, it will pop back out. The shaft of the other motor is completely fixed/stable. Is this normal?
Hello acullman.
That does sound a bit odd and I’ve not had a motor do that before. These are made to pretty loose tolerances and it’s possible for there to be a little play in the shaft. Give it a try and if you have trouble with the motor, fill out the form [on this page with your order information and we can get a replacement motor for you. :-)](https://www.sparkfun.com/support)