It starts somewhere near rated rpm and dies. brushes? Burnt armeture? How do I tell which? It is clean not all that old and originally from a 1" belt sander. Anybody know a good website that can teach me about tool motor diagnosis and repair? It's a very nice little motor and I want to fix it.
2007-05-20 05:36:08 · 5 answers · asked by Gary B 2 in Home & Garden ➔ Do It Yourself (DIY)
Does it hum when it dies? If so, could be a bad or dry bearing. No hum? Probably the centrifugal switch inside is bad or the run winding is open (um...dead).
2007-05-20 05:45:16 · answer #1 · answered by steve.c_50 6 · 0⤊ 0⤋
It may be the Brushes or Armature. It should not be too hard to take apart and look. If, the brushes are spring loaded just remove slow and not lose your spring. An easy way to get back together is use a very fine wire to tie the brushes back until you get them back on the armature.
To clean an armature I place in an electric drill and the drill in a vise to hold. May use a towel or something as a padding so you not damage the drill. With the drill running I use Emory Cloth and hold each end in both hands curving around the Copper. Using light pressure I work back and forth, be careful not to sand the wires, just the copper the brushes run on. After it clean I spray with Electrical Cleaner to remove the Emory Dust being sure to clean well, as Emory Cloth can be conductive and short your contacts, I just like it as it does a good job.
If, the Brushes are worn, you need to replace with new and Solder the wires. Many Industrial Supply Stores should have Brushes, just take the old with you. You may call around and a good Hardware Store may help you know where to find the Brushes.
Also, many Alternator/Starter Repair Shops may be able to fix cheap or give you some free advise and Cheap Brushes. I know a man and he elderly and he give me stuff all the time. He just enjoys some visits and someone to talk to.
It hard to find you a link. Below is "How Stuff Works" it at least give you an idea of what you be looking at.
2007-05-20 05:53:26 · answer #2 · answered by Snaglefritz 7 · 0⤊ 0⤋
Every motor I had always instructed me to replace the brushes if performance falls / fails. This is why I am very sure it is your brushes, your performance is failing. You should buy new brushes, so you can open it and chech out the other things too but replace the brushes anyway since it is open. If all else looks good close it and try it now...if its the same you now know it is not the brushes any more unless they were installed impropperly.....
You could just go the other way....
Current = torque
Voltage = speed
So if the problems were wth the torque of the motor then we know it is with the current, and that would be Bearings.
If the problem were with the speed of the motor then the problem has to be voltage, and that would be brushes
If the problem were with both it is understood that one caused the other to fail after failing itself.
2007-05-20 06:22:58 · answer #3 · answered by Anonymous · 0⤊ 0⤋
the motor slow down because not enough torque due to small hp rating, which you can feel the motor is heated up.
2007-05-20 07:57:55 · answer #4 · answered by Anonymous · 0⤊ 0⤋
take it to a tool repair shop, they will do a maintenance on it, and have you up and running in no time.
2007-05-20 05:42:49 · answer #5 · answered by Greg L 5 · 0⤊ 0⤋