Peter Aeschliman
09-26-2017, 10:45 AM
Hi all.
I recently acquired a 1950's DeWalt model GA radial arm saw with a 3hp single phase motor.
The wiring in the motor was pretty tattered, so I carefully replaced the wires that I could replace, and added shrink tubing to the wires going into the motor (which can't be replaced without re-winding the motor from what I could tell).
I added a new magnetic switch from grizzly (http://www.grizzly.com/products/Magnetic-Switch-Single-Phase-220V-Only-3HP-21-25A/T24101).
I started it up without a blade installed (still waiting on it from Forrest). It starts and runs fine from what I can tell without a blade, except that there is a loud clicking and electrical arcing sound coming from the box on the motor. I opened it up to take a look, and there is visible arcing occurring at what I believe is called the centrifugal switch. Here is a video of me shutting down the motor:
https://photos.app.goo.gl/y0QiZPlUegjYshc53
My question is: Is this arcing normal? If not, what can I do about it?
Thanks in advance for your help!
Peter
I recently acquired a 1950's DeWalt model GA radial arm saw with a 3hp single phase motor.
The wiring in the motor was pretty tattered, so I carefully replaced the wires that I could replace, and added shrink tubing to the wires going into the motor (which can't be replaced without re-winding the motor from what I could tell).
I added a new magnetic switch from grizzly (http://www.grizzly.com/products/Magnetic-Switch-Single-Phase-220V-Only-3HP-21-25A/T24101).
I started it up without a blade installed (still waiting on it from Forrest). It starts and runs fine from what I can tell without a blade, except that there is a loud clicking and electrical arcing sound coming from the box on the motor. I opened it up to take a look, and there is visible arcing occurring at what I believe is called the centrifugal switch. Here is a video of me shutting down the motor:
https://photos.app.goo.gl/y0QiZPlUegjYshc53
My question is: Is this arcing normal? If not, what can I do about it?
Thanks in advance for your help!
Peter