[imperative]

My X3 has developed very erratic stop/start motion at low motor speed settings and has no power to do any work. Opinions - motor, control board or speed control potentiometer?

[phomann]

Hi,
If it is DC motor with brushes, check the condition of the brushes by removing them and have a look. They may be worn or dirty.

Cheers

Peter


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[rcheli]

You may find some useful info at the link below on the trouble shooting page. Although checking the motor brushes as phomann said is the first thing I would do.

www.olduhfguy.com

[rodw]

I've had this problem with a SX3. unplugging connectors and wiping down with Innox fixed mine.

[imperative]

Thanks all for your replies. I have checked the brushes and they seemed fine but the commutator looks a bit ordinary. Its like the machine has a broken wire or similar with stop-start-stop-start action and it seemed to happen all of a sudden. I guess I'll check the connections and pull the motor and get a little more serious. I have a bit on my plate at the moment and was just trying to 'short circuit' the repair as its annoying not having the drill for quick little jobs. Thanks again.