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- Sep 22, 2010
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Some machines have two separate motors.
Can two separate motors on a machine be wired to a VFD? If so, how?
The following question came from another forum:
(http://www.practicalmachinist.com/vb/transformers-phase-converters-vfd/vfd-2-motor-machine-229284/)
"I am taking delivery of an oscillating spindle sander and will need to provide 3-phase power from my 1-phase supply. This machine has separate motors for the spindle and oscillation, with the oscillator motor switchable on/off independently even while the spindle is running. I understand that VFDs are very touchy about having any switches or anything between them and the motor. I'd also rather not rewire the machine if possible - I was thinking I could just short the original starter control into a permanent "on" position and use the VFD as an on/off/reverse control.
Will the dual motors (with one switching on and off during operation) be no good with a VFD? If so, I guess I'm stuck with buying an RPC."
there is an explanation there, but I don't exactly follow it. Can someone explain it more simply?
Thanks,
Nelson
Can two separate motors on a machine be wired to a VFD? If so, how?
The following question came from another forum:
(http://www.practicalmachinist.com/vb/transformers-phase-converters-vfd/vfd-2-motor-machine-229284/)
"I am taking delivery of an oscillating spindle sander and will need to provide 3-phase power from my 1-phase supply. This machine has separate motors for the spindle and oscillation, with the oscillator motor switchable on/off independently even while the spindle is running. I understand that VFDs are very touchy about having any switches or anything between them and the motor. I'd also rather not rewire the machine if possible - I was thinking I could just short the original starter control into a permanent "on" position and use the VFD as an on/off/reverse control.
Will the dual motors (with one switching on and off during operation) be no good with a VFD? If so, I guess I'm stuck with buying an RPC."
there is an explanation there, but I don't exactly follow it. Can someone explain it more simply?
Thanks,
Nelson