Got a lathe, question about the electric motor.

[DARK AGE 53]

Here's my lathe thread http://www.garagejournal.com/forum/showthread.php?t=271570 .

The previous owner had cut the wire cord at the motor, that left me with a wire stub and I don't have any idea how it hooks up. Th motor is a Dayton 1/3 hp, 115 volt, the cord was a four wire. What's kinda odd is one wire is red, one wire looks dark gray ( maybe black ), and the other two wires are black. The motor itself has a black, red wire, two of the cord wires were contacted to two threaded screws inside the motor. I hope I have explained it well enough for you guys to understand.

Can anyone tell me why it's a four wire motor, pics, videos would be a great help.

Thanks,
Al

 

[600SL]

Here's my lathe thread http://www.garagejournal.com/forum/showthread.php?t=271570 .

The previous owner had cut the wire cord at the motor, that left me with a wire stub and I don't have any idea how it hooks up. Th motor is a Dayton 1/3 hp, 115 volt, the cord was a four wire. What's kinda odd is one wire is red, one wire looks dark gray ( maybe black ), and the other two wires are black. The motor itself has a black, red wire, two of the cord wires were contacted to two threaded screws inside the motor. I hope I have explained it well enough for you guys to understand.

Can anyone tell me why it's a four wire motor, pics, videos would be a great help.

Thanks,
Al

The 4 wire probably have something to do with reversing. Something is not clear you are saying the PO cut the chord but two wires were still connected. Do you have a reversing drum switch?

 

[DARK AGE 53]

The red cord wire and one of the black wires where disconnected, I'm quite sure they where wire nutted to the red and black motor wires. There may have been a drum switch mounted someplace then on the lathe, but know it didn't have one with it when I bought it.

With the motor off the lathe, I tried seeing if it would run by taking the red and black wires from the motor and hook it up to an extension cord. All I got was a humming noise from the motor, the motor is a capacitor start style motor. Thanks for the reply.

 

[nine4gmc]

Could that gray wire be a dirty old white wire and I'm thinking the same as 600SL, the extra wires are probably for reversing the motor.

 

[DARK AGE 53]

I wiped down that wire with cleaner thinking the same thing, it's not white. Is the motor only making a humming noise because there's no ground wire, does it matter which slot in the extension cord I put the red and black motor wires in?

 

[nine4gmc]

IME, the humming was from having the wrong two wires hooked to power. Try the black and gray to power and see if she spins. The pro's will tell you to meter them and you can tell the starter circuit from the main winding but I just touched wires until it worked. I don't suggest you try this at home.

 

[DARK AGE 53]

Correction, I took some sandpaper to the gray/black wire and it looks like it's white.

 

[DARK AGE 53]

IME, the humming was from having the wrong two wires hooked to power. Try the black and gray to power and see if she spins. The pro's will tell you to meter them and you can tell the starter circuit from the main winding but I just touched wires until it worked. I don't suggest you try this at home.

The motor itself has a red and black wire, would those be the ones to hook up? I just know I'm not doing a good job of explaining myself.

 

[nine4gmc]

I'm still thinking the black and white will spin it up, the other two are for reversing direction.

 

[DARK AGE 53]

Maybe these pics will help, sorry for such crappy pics.

 

[600SL]

Are there any making by the terminals like "T1", "T2" etc. You might consider down loading the spec from a similar motor and seeing how its wired.

 

[DARK AGE 53]

Are there any making by the terminals like "T1", "T2" etc. You might consider down loading the spec from a similar motor and seeing how its wired.

I have this cover plate, again, sorry for such a crappy photo.

 

[nine4gmc]

LINE is the two you need hooked up to power, use the red and black to reverse direction.

 

[DARK AGE 53]

LINE is the two you need hooked up to power, use the red and black to reverse direction.

In the first pic you can see the previous owner had a wire contacted to the two top studs, from what you're saying and looking at the cover plate the top and bottom studs would be what contact to? I'm sorry I'm making this so hard but I'm not the sharpest knife in the kitchen.

 

[nine4gmc]

No problem, I went through this myself last year or the year before myself, a couple times and people here helped me through it so I can at least return the favor.

Top and bottom posts should be wired to your extension cord, you would then switch the red/black wires to change direction with a drum switch or I have seen it done with certain toggle switches but that's a whole nutha story.

 

[DARK AGE 53]

Does it matter which side of the extension cord slots I put the two wire into, thanks.

 

[nine4gmc]

It shouldn't matter with those two. I wish some of the guys that helped me would chime in, there was some great help because I am not the sharpest knife either!

 

[DARK AGE 53]

I hooked a wire to the top and bottom studs, no sound, no nothing. At least you tried to help, thanks.

 

[nine4gmc]

Sorry, I should have mentioned that you may will probably the red/black wires hooked up to the two center posts as well for it to work.

 

[DARK AGE 53]

I hate to throw in the towel but being I'm not sure what studs they go on I'll stop, I do appreciate all of your input. Thanks

 

[nine4gmc]

Either with the red and black, those are the two that would be swapped around to reverse motor spin. If you have the Black hooked up to T2 and Red hooked to T3, you should then be able to hook your extension cord to the T1 and T4 terminals and it work.

 

[DARK AGE 53]

Either with the red and black, those are the two that would be swapped around to reverse motor spin. If you have the Black hooked up to T2 and Red hooked to T3, you should then be able to hook your extension cord to the T1 and T4 terminals and it work.

Gave it a try today, all I got was a humming sound....maybe it's just a bad motor.

 

[Jere]

Humming sounds like an old motor issue. You don't want to do that too much or you will burn some stuff in the motor. Its is still fixable otherwise, might just need cleaned and oiled or a new bearing. Are you working in a cold room? Are you using a high enough rated circuit for the motor? Can you turn the motor while it is off?

 

[DARK AGE 53]

Humming sounds like an old motor issue. You don't want to do that too much or you will burn some stuff in the motor. Its is still fixable otherwise, might just need cleaned and oiled or a new bearing. Are you working in a cold room? Are you using a high enough rated circuit for the motor? Can you turn the motor while it is off?

Not cold here in Alabama so that's not the problem, motor turns by hand and noise noise coming from the bearings.....circuit is fine also. I think the best thing would be to just get a new motor, for what it would cost to get it fixed I'd be better off getting a new motor. Thanks for the reply.

 

[Jere]

Even if you replace the motor it would still be prudent to diagnose the issue. There could be a bad switch or something else causing issues. Sound isn't always the sign to bad bearings, check the bearings for play up and down ( not axial) some just wear out.

Here is a link to leeson s motor diagnoses page if you want to tinker with the motor. http:// http://www.leeson.com/TechnicalInformation/troubleshooting_acmotors.html Ac motors are pretty easy to take apart and put back together, there are maybe 4 bolts and that's pretty much it.

 

[DARK AGE 53]

Even if you replace the motor it would still be prudent to diagnose the issue. There could be a bad switch or something else causing issues. Sound isn't always the sign to bad bearings, check the bearings for play up and down ( not axial) some just wear out.

Here is a link to leeson s motor diagnoses page if you want to tinker with the motor. http:// http://www.leeson.com/TechnicalInformation/troubleshooting_acmotors.html Ac motors are pretty easy to take apart and put back together, there are maybe 4 bolts and that's pretty much it.

There's no switch involved, powered up direct to a cord....link doesn't work.