10v source for spindle VFD
- mooser
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01 Mar 2026 21:06 #343700
by mooser
10v source for spindle VFD was created by mooser
For no real good reason I'd like to change my lathe from using 0-5v to control the spindle to 0-10v.
The VFD is an old VFD05-D230 and it has the options of 0-5V, 0-10V and 4-20mA and supplies it's own 5v if you are using a potentiometer so it looks like I just wired my 7i76 (old version connected to a 6i25 via DB25 cable) in place of the pot. I can't find any way that VFD will supply 10vdc so I need to use an external power supply but most are 5 or 12 (when I say most I mean all the ones I have here and the quick look at meanwell online. Digikey ones quickly jump to well over $100)
I know 0-10 is closer to standard but what are you using for supplies? Is a 12-10 buck converter ok? Can I "turn down" a meanwell 12v to 10 without killing it?
Just asking what some options are
Thanks
The VFD is an old VFD05-D230 and it has the options of 0-5V, 0-10V and 4-20mA and supplies it's own 5v if you are using a potentiometer so it looks like I just wired my 7i76 (old version connected to a 6i25 via DB25 cable) in place of the pot. I can't find any way that VFD will supply 10vdc so I need to use an external power supply but most are 5 or 12 (when I say most I mean all the ones I have here and the quick look at meanwell online. Digikey ones quickly jump to well over $100)
I know 0-10 is closer to standard but what are you using for supplies? Is a 12-10 buck converter ok? Can I "turn down" a meanwell 12v to 10 without killing it?
Just asking what some options are
Thanks
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- tommylight
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01 Mar 2026 21:14 #343701
by tommylight
Replied by tommylight on topic 10v source for spindle VFD
Most decent power supplies do have an adjustment pot, clearly visible and marked on DIN rail mount types, not clearly visible on the mesh metal cased ones.
It is much easier to use two diodes in series wired to positive of 12V on one side and to Mesa +10V on the other side, that will drop the voltage by 1.2-1.3V and should be perfectly fine for the VFD. Mind the polarity, the line on the diodes goes towards the Mesa board.
It is much easier to use two diodes in series wired to positive of 12V on one side and to Mesa +10V on the other side, that will drop the voltage by 1.2-1.3V and should be perfectly fine for the VFD. Mind the polarity, the line on the diodes goes towards the Mesa board.
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