Apologies if I am posting this to the wrong audience, but I am struggling to think where else to ask.
I am trying to fix a pottery wheel. Problem is that it runs intermittently and the speed controller doesn’t vary the speed smoothly.
Thought I’d take a logical approach and start with checking power to the motor. I think it’s a DC permanent magnet motor. I put a multimeter across the 2 wires into it and WOW 300v DC! Actually it varies and can show 400v or more. Logic would tell me this can’t be right. I have tried 2 multimeters, which show the same. Also I have a neon test probe and this lights up considerably brighter than when I test the 240v mains.
I have tested with both the motor connected and disconnected, as initially without the motor I thought it might be something to do with no load applied. But both tests show the same.
This is a cheap Chinese hobby pottery wheel (not an industrial unit). The wiring is certainly not spec’ed for very highly voltage. The controller also doesn’t look like it’s built for high voltage (similar to a treadmill controller)
Can anyone help me identify what I am assuming must be a basic error in my testing approach?
many thanks
Peter
I am trying to fix a pottery wheel. Problem is that it runs intermittently and the speed controller doesn’t vary the speed smoothly.
Thought I’d take a logical approach and start with checking power to the motor. I think it’s a DC permanent magnet motor. I put a multimeter across the 2 wires into it and WOW 300v DC! Actually it varies and can show 400v or more. Logic would tell me this can’t be right. I have tried 2 multimeters, which show the same. Also I have a neon test probe and this lights up considerably brighter than when I test the 240v mains.
I have tested with both the motor connected and disconnected, as initially without the motor I thought it might be something to do with no load applied. But both tests show the same.
This is a cheap Chinese hobby pottery wheel (not an industrial unit). The wiring is certainly not spec’ed for very highly voltage. The controller also doesn’t look like it’s built for high voltage (similar to a treadmill controller)
Can anyone help me identify what I am assuming must be a basic error in my testing approach?
many thanks
Peter