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Jet 1014VS electrical issue

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Forum topic by Bill7255 posted 01-26-2016 12:53 AM 650 views 0 times favorited 10 replies Add to Favorites Watch
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Bill7255

354 posts in 1749 days


01-26-2016 12:53 AM

I have a Jet midi lathe with vs. I haven’t used it much for turning lately as I have a PM 90. I decided to use it to try to make a final. As I was rounding the stock it tripped the 8 amp lathe circuit breaker. This was after just a minute or so of operation. Nothing hot or anything else. I reset it and long story short it keeps tripping under light load. Motor brushes are fine, electronic board was clean. The only thing I can think of is the circuit breaker switch is faulty. Is there anything else I can check?

I am fortunate as I have a Delta midi as a backup. I got it off the shelf and set it up and it is running fine. The only reason I was using the Jet is it is vs.

Questions, the Jet is a DC motor and the Delta is AC. I have a router speed control I am not using. If it is the Jet electronics board is at fault, could I bypass that and use the router speed controller?

-- Bill R


10 replies so far

View MadMark's profile

MadMark

978 posts in 917 days


#1 posted 01-26-2016 06:06 AM

Is it set for 220vac?

M

-- Madmark - Madmark2150@yahoo.com Wiretreefarm.com

View becikeja's profile

becikeja

645 posts in 2277 days


#2 posted 01-26-2016 11:39 AM

If you have multi-meter or a fluke you connect it across the terminals and see the amperage being pulled across the pop breaker. If you have a bad motor winding you will see the spike. But my guess is you need to replace the pop breaker.

-- Don't outsmart your common sense

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Bill7255

354 posts in 1749 days


#3 posted 01-26-2016 12:12 PM

No to the 220. I have a meter, but not easy to connect to measure amps. I’m going to see if I have a 8 amp fuse and wire that in to test. I can get a ereplacement breaker, but don’t want to start throwing money down a rabbit hole if this is going to be the motor or board.

-- Bill R

View dhazelton's profile

dhazelton

2325 posts in 1761 days


#4 posted 01-26-2016 01:44 PM

You could get a Kill a Watt and plug your machine into it to see the draw. I got mine at HF for about $15.

View Bill7255's profile

Bill7255

354 posts in 1749 days


#5 posted 01-26-2016 08:06 PM



If you have multi-meter or a fluke you connect it across the terminals and see the amperage being pulled across the pop breaker. If you have a bad motor winding you will see the spike. But my guess is you need to replace the pop breaker.

- becikeja

I ran the wire out of the reset and hooked up the amp meter. Start up was about 2.5 amps. When applying a load I saw peaks up to 12 amps and 7 amps with just a light load. So I guess the 8 amp breaker is ok and the motor windings are bad. New motor is about $300, so for now I will just use it for buffing until it quits. The Delta is set up and running. The Delta motor always did seem stronger, but it is not VS. No big deal however.

-- Bill R

View MrUnix's profile

MrUnix

4226 posts in 1663 days


#6 posted 01-26-2016 08:21 PM

If the Delta has a brush type motor, you can probably use that router speed controller on it.

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

View Bill7255's profile

Bill7255

354 posts in 1749 days


#7 posted 01-26-2016 09:05 PM



If the Delta has a brush type motor, you can probably use that router speed controller on it.

Cheers,
Brad

- MrUnix

It’s capacitor start.unfortunatlty.

-- Bill R

View Rick M's profile (online now)

Rick M

7918 posts in 1844 days


#8 posted 01-26-2016 10:14 PM

Questions, the Jet is a DC motor and the Delta is AC. I have a router speed control I am not using. If it is the Jet electronics board is at fault, could I bypass that and use the router speed controller?

- Bill7255

To answer the question, no, you shouldn’t. DC motors use a PWM (pulse width modulator) to regulate speed.

-- http://thewoodknack.blogspot.com/

View becikeja's profile

becikeja

645 posts in 2277 days


#9 posted 01-27-2016 02:27 AM

The 12 amp draw would cause your breaker to open, no question about it so it’s doing its job. But if it was a motor winding it would have shot up much higher than that, I don’t think its the winding. Sounds like it could be the centrifugal switch. The capacitor provides extra current to get the motor started. Once turning the centrifugal switch will open taking the capacitor out of the circuit. If it doesn’t open the capacitor will continue to provide the extra current. It sounds like this is what you are seeing. Open the motor and blow it out with an air compressor. I have had dust lodge into these switches on tools in the past and keep them from opening. A little clean out and all works well. -but I’m also wondering if your getting a short in the VS controller somehow. Sorry not much help.

-- Don't outsmart your common sense

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Bill7255

354 posts in 1749 days


#10 posted 01-29-2016 11:25 AM

Just to finalize, I did take the motor apart and cleaned. Nothing was out of the ordinary. Put it all back together and better, but not right. I estimate about 70% new power. I will just use it for buffing until it dies and yes the Delta.

-- Bill R

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