Centroid Community CNC Support Forum

https://centroidcncforum.com/viewtopic.php?f=63&t=1650 tells how to calibrate your VFD.

Parameters 65-67 control the spindle gear ratio settings. I believe there is also a setting in the Wizard for this.


That describes how to get your VFD to spin your motor at the commanded speed. The motor IS ...

So here's how things are setup.

PM940V conversion running Acorn into a Delta VFD-E. The base specs on this motor are 0-1390 RPM and I have Acorn currently configured to this.
The spindle itself is driven by a belt from the motor with two possible pulley arrangements. The low gear arrangement is ...

centroidsupport wrote: ↑Mon Dec 27, 2021 3:27 pm FWIW When following the wiring in 15008r2 , the Wizard settings should be OUT4 = VFDEnable and OUT5 = VFDDirection.

I had my software parameters setup wrong for the output. It's working now. Thank you for your help

Please wire it per 15008r2. I'm not sure why there is a difference, but the wiring method in 15008 insures that only FWD or REV can be commanded at anytime. The wiring used in 14826 could allow both to be commanded at the same time. The PLC should prevent this but it could but the wiring in 15008 ...

Do you also have DCM jumpered to the center (common) terminals of your OUT4 and OUT5 relays?

The relay board has no internal connection between the commons of the different relays. They are all independent of each other.


I'm thinking that may be the problem, I didn't have DCM jumped to the ...

To be clear, DCM does not go to COM on H10 on the Acorn. It goes to the "commons" for the outputs you are using for forward reverse. Which outputs/relays on the relay board. Which relays is DCM wired to?

NOTE: The "common" on a relay is simply the voltage to be switched. It could be COM but it is ...

Running an Acorn rev4 and retrofitting my PM940V mill (came with a Delta VFD-E to run the spindle).

I've pored over the forums for days trying to figure it out. As it sits right now, Acorn is successfully sending a signal to the VFD, and the VFD is adjusting the output frequency based on what it is ...

So I'm about to begin converting this PM940V (New variable speed model of PM's higher end bench mill) to CNC and I plan to run Acorn.

I'll be installing double ball screws and Nema34 mounts when I get them in. I know CNC operation and such but as far as circuitry, I could use some help.

1. Given ...