Turning

Subject:
Re: Motor Issues
Response To:
Re: Motor Issues ()

Mequipment
Check for loose, burnt or corroded connections at the motor controller and motor terminations.
Check condition of the motor brushes and motor winding contacts commutator.
If the commutator bars are dirty and rolled over they could be shorting the windings which would reduce power. You can clean the commutator contact bars and sometimes they need to be turned smooth on a lathe by taking several thousandths of an inch off the circumference of the commutator contacts, you then clean all of the carbon and copper filings from between the commutator bars.
You then want to check the condition of the motor brushes and file them flat or replace them.
If you have a multimeter you can check the resistance and continuity of the windings, you can also test to see if any of the windings are shorted to the motor armature.
You can also measure the voltage output of the motor controller with the multimeter.
If you have another DC motor you could wire it to your controller to see if you can get any torque off of that motor, most tread mills use DC motors 1-1/2 or 2 HP usually.
If you have a treadmill you could run power leads from that controller to your lathe motor and see if you can get torque out of the lathe motor with the treadmill controller.
Either of those two tests should tell you if the motor is bad or the controller is bad.

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