VFD wiring to run from commandcnc

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ggeh
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VFD wiring to run from commandcnc

Post by ggeh »

I have a 220 volt VFD that I turn on/off with a wall switch and control the spindle speed with a pot on the VFD. I would like to control the VFD in commandcnc to turn on/off and control the spindle speed. I think I could use a step up transformer at the 120 volt aux outputs a or b but not sure on the wiring to control the spindle speed from commandcnc.
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djreiswig
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Re: VFD wiring to run from commandcnc

Post by djreiswig »

To switch it, you could use a 120v relay to switch the start/stop connections on the vfd. They should be low voltage. Plug it into one of the output plugs.
The speed usually requires 0-10v or 4-20mA. No idea how you can get that type of signal.
2014 Bulltear (StarLab) 4x8
C&CNC EtherCut
Mach3, SheetCam, Draftsight
Hypertherm PM65
Oxy/Acetylene Flame Torch
Pneumatic Plate Marker, Ohmic, 10 inch Rotary Chuck (in progress)
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djreiswig
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Re: VFD wiring to run from commandcnc

Post by djreiswig »

2014 Bulltear (StarLab) 4x8
C&CNC EtherCut
Mach3, SheetCam, Draftsight
Hypertherm PM65
Oxy/Acetylene Flame Torch
Pneumatic Plate Marker, Ohmic, 10 inch Rotary Chuck (in progress)
ggeh
3 Star Elite Contributing Member
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Posts: 319
Joined: Thu Mar 31, 2016 2:51 pm

Re: VFD wiring to run from commandcnc

Post by ggeh »

djreiswig wrote: Tue Apr 07, 2020 8:50 pm To switch it, you could use a 120v relay to switch the start/stop connections on the vfd. They should be low voltage. Plug it into one of the output plugs.
The speed usually requires 0-10v or 4-20mA. No idea how you can get that type of signal.
Hey thanks alot for the relay idea, I have that one ordered.
gary
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