- Joined
- Jun 15, 2017
- Messages
- 531
My Gorton 375 grinder arrived. Unfortunately, I can't use it. The outlets in my workshop are on a GFCI circuit, and every time I turn the motor on, it trips the GFCI instantly. I have connected the motor power leads directly to the hot and neutral lines, and the GFCI still trips, so it has to be a motor issue. The motor starts and runs fine on a normal circuit. The resistance between the hot and neutral motor leads, when disconnected from the switch, is 2 ohms.
I figured I would change the motor's capacitors and see if it helped, because that's all I can do short of taking it to a shop. I got the motor out of the grinder, and now I'm stumped. It has some kind of fancy vibration-isolation hubs on it, and I can't figure out how to get them off. Also, I don't see the capacitors. I assume that if I get the end of the motor casing off, I will eventually find a capacitor in there somewhere.
I thought I knew a few things about AC motors, and one of the things I thought I knew was that they used start capacitors. Now I'm reading that this is not always the case. Not sure what to think about the motor I'm working on now.
I would like to find out a) why the motor is tripping the GFCI, b) how to open it up, and c) whether it has capacitors in it. It's a 1725-RPM 1/4-HP 110V motor. Tips appreciated.
I figured I would change the motor's capacitors and see if it helped, because that's all I can do short of taking it to a shop. I got the motor out of the grinder, and now I'm stumped. It has some kind of fancy vibration-isolation hubs on it, and I can't figure out how to get them off. Also, I don't see the capacitors. I assume that if I get the end of the motor casing off, I will eventually find a capacitor in there somewhere.
I thought I knew a few things about AC motors, and one of the things I thought I knew was that they used start capacitors. Now I'm reading that this is not always the case. Not sure what to think about the motor I'm working on now.
I would like to find out a) why the motor is tripping the GFCI, b) how to open it up, and c) whether it has capacitors in it. It's a 1725-RPM 1/4-HP 110V motor. Tips appreciated.