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ZumoShield front right wheel stuck/jammed

Everything was working perfectly till the middle of the day. I have been using my Zumo robot for months.
The right wheel is not rotating freely and smoothly, above all in CCW direction. So now the robot only drives forwards and when it needs to reverse it jams and makes a high pitched sound due to the right wheel.
Perhaps some small debris or hair are stuck somewhere? Should I try and unmount the wheel to remove them? Or have I damaged the motor instead? Please help
Thanks :pensive:

Hello.

This sounds like the same issue we are already discussing in this thread:

Let’s continue our discussion there.

- Patrick