Originally Posted by
jonboyusmc
I just recently picked up a P/P lathe and a mill. Microkinetics was no help, so I decided to gut the lathe. I've put a pair of g251's in, and kept the original 40v power supply. I've got it up and running with Mach3, but it's dog slow (about 1 1/2 minutes to move 1/4") and you could fry an egg on the motors. I can't seem to find any part numbers on the motors. They are Oriental Motor brand. Does anyone know what these motors are, or where to find a part # on them? I'm running the g251's without any resistor, so I am sure that's where the heat is coming from. Can anyone shed some light on this, or at least point me in the right direction. Thanks in advance.
Those sound like vexta stepper motors. I would replace them with motors you know the specs on. Also, they might be miswired unipolar motors that are being run with too much current. You better get some current limiting resistors on those babies, pronto! You don't need the most powerful motors for that machine. I would check out eBay for replacements.
Can you send a picture of the machine, I think I might have used one like it when I taught at my old school.
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