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Morning All I recently acquired a pottery wheel and after much dicking about managed to get the motor working. However there is an issue.I will be using alot of lame man terms because, honestly I don;t know what I'm talking about. So the pottery wheel is a Judson and Hudson cone drive. I found it on Freecycle about 15 miles away from where I live. After many emails I arranged the come and take a look and decide if it was viable. When I say look, it was under tarpaulin and and it was raining. The sum total of looking was exactly that. "will it fit in the car" maybe. A week later me and my strongest friend made the journey to pick it up and boy was it heavy. We drover it home unloaded it and it sat there on the drive for 2 weeks. Eventually Mrs Bear decided it had to go in the garage. The garage was a state so we spent the whole weekend going through all the curse word I had accumulated just to fit it in. So here she is
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So to work. Armed with some wd40 I set about figuring out what was what. and what was wrong with it. The lady I collected it from told me it work but that there was a "bump" in the wheels rotation. The belt was pretty ruined so that was problem number one. New belt ordered.
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Oct 14, 2019 10:03:50 GMT
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The next issue was electrical and this is where I'm truly lacking in expertise. The motor was moving freely but when I plugged in the wheel nothing happened. I took the plug apart and sure enough the inside was wet and the fuse looked like it had arced at some point. I let this dry out and replaced the fuse. Still nothing.
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Oct 14, 2019 10:07:37 GMT
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So following the the cable I started to take apart the switch to see what was going on inside and see if there was anything obvious. I didn't really know what I was looking at but using the buttons on the front of the switch I had a good idea what was off and on.
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Oct 14, 2019 10:13:16 GMT
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So tentatively, I tried pressing the buttons to see if anything happened, nothing. I then pressed the button under where it says a1 and it spray into life. The problem I've got is that the a1 button isn't the "ON" button. It stays on for as long as I'm pressing it.
Any ideas what or how I'm doing wrong would be very helpful.
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Last Edit: Oct 14, 2019 10:14:45 GMT by edwardbear
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Oct 14, 2019 13:50:58 GMT
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Does it make any noise when you just press on?
I know little but my lathe motor has 2 sets of winding i believe. You have to switch it one way to start the motor spinning, then the other way to keep it spinning. Just switching it to run just makes it hum. I believe this is maybe because its old and has no start capacitor? I don't know.
Maybe you have to use the switch to get it started then press on to keep it running?
That could a be complete rubbish though.
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Oct 14, 2019 13:52:11 GMT
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Also, does that switch auto disengage when the motor sees too much load? If my drill motor is working too hard the switch auto cuts.
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Oct 14, 2019 15:24:53 GMT
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1 - Not sure what this is for. 2 - ON switch 3 - OFF switch when the covers on and I press 2 nothing happens When I take the cover off and press 2 (which is on a hinge) nothing happens When I press 1 when the cover is off, it works. I hope that makes sense.
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Oct 14, 2019 16:02:53 GMT
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Hi. Can you tell the size of the blown fuse in the plug? There is a small lever at the bottom right of your control switch that has been set to maximum, this controls the current at which the device should trip out and is not usually set to maximum. "Button" 1 is a direct physical connection to the electrical switches inside the "contactor". Pressing this will send power to the motor but it overrides the safety device. From what you tell us the motor has had a current overload situation, which could have been a short circuit or there may be a fault in the motor or wiring. If you can get a photo of the motor name plate it will say what the current should be. Mains voltage can kill. Please be careful and don't work on this with it plugged in.
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Last Edit: Oct 14, 2019 16:04:54 GMT by davtrac
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13A fuse Not some of my best photographic work. It's in a really awkward place without much light. So I had to balance a touch and my phone to get any decent images.
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I did a quick google on the 1/3 hp motor and came up with this
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Phil H
Posted a lot
Posts: 1,448
Club RR Member Number: 133
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My guess is the coil for the contactor has burnt out, hence why the start/latch switch (2) doesn't work but pushing the contactor contacts (1) in directly does.
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Last Edit: Oct 15, 2019 8:27:16 GMT by Phil H
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Spot the difference The stop button twists. Not sure if it's meant to do that. But the big red button doesn't twist.
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Phil H
Posted a lot
Posts: 1,448
Club RR Member Number: 133
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Big red button on the front should stay in when pressed, and is normally twist (left usually) to release. Might it line up with the grey arrowed plastic section? Tricky to say with these electro-mechanical starters.
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Last Edit: Oct 15, 2019 8:38:07 GMT by Phil H
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My guess is the coil for the contactor has burnt out, hence why the start/latch switch (2) doesn't work but pushing the contactor contacts (1) in directly does. Interesting. How do you replace a coil?
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Phil H
Posted a lot
Posts: 1,448
Club RR Member Number: 133
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In the old days the coil was a separate items - these days the contactor and coil are one moulded item. Trying to find one exactly the same as yours might be tricky though.
Have you tried to see if the red button on the front lines up with the rotatable stop button inside?
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vanpeebles
Part of things
I am eastbound in pursuit of a white Lamborghini, this is not a recording.
Posts: 978
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What a great company English Electric was
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In the old days the coil was a separate items - these days the contactor and coil are one moulded item. Trying to find one exactly the same as yours might be tricky though. Have you tried to see if the red button on the front lines up with the rotatable stop button inside? I believe it does. Its weird that the white bit twists but the red outer button does not.
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Phil H
Posted a lot
Posts: 1,448
Club RR Member Number: 133
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The red bit might only twist when depressed..sort of like a bayonet fixing.
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Right, I'm going to have a mess around with it tonight.
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