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Troubleshooting a DC motor

Troubleshooting a DC motor

Troubleshooting a DC motor

Hi, I hope it's ok to ask here. As a hobby I fix up old lapidary and jewelry making machine. An old faceting machine I am working on has a loud motor. Would anybody here please be able/willing to help me troubleshoot based on a sound the motor makes? I would mainly like to know if the motor is sounding ok to you and if not if you have a guess on what is wrong and if it's fixable (e.g. bearings, brushes,..).

I attached the video and also uploaded it to youtube so you can hear how it sounds.
It's hooked up to a speed control and is reversible.

Motor info:
Leeson motors cm24d26nz1a
Volts 90
RPM 2565
AMPS .45
HP 1/26

I'll be grateful for any help you can provide. Thank you!

RE: Troubleshooting a DC motor

First thing to check;
When the bushings get worn on these small motors, the shaft may "walk" the bushing.
That is, instead of turning smoothly, it sort of ricochets from side to side in the bushing.
This may make a noise and will slow the motor down and put a load on the motor.
An accompanying issue may be lack of lubrication. (Running dry or almost dry.)

Ohm's law
Not just a good idea;
It's the LAW!

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