We have a motor that came out of a Rigid wood planer that had started to burn at the commutator. We took the armature out and noted that it was pretty blackened but not noticeably worn or out of round. We buffed it up with a soft wire wheel, cleaned between the segments, and except for a slight bit of "raggedness" between the segments it shows little wear and it cleaned up nicely. There were no shorts to ground and it looked good on the growler as well. This motor was previously apparently operated with worn brushes and I thought that this would be the extent of it when we replaced them. The new brushes are making good contact on the segments now, however severe burning is still taking place more so at one brush than the other. We took it to a motor shop and they can't figure it out either. The field does not look burned and checks good too. The motor operates on 120V 60Hz. Does anyone have any ideas? Thanks, Lenny
- posted
11 years ago