Wiring CNCRP Spindle to Acorn.

[Devlin]

Got the spindle kit and can see the wiring into the vfd easily enough.

[Devlin]

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[Devlin]

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[Devlin]

It is working just fine now. The schematic you posted worked perfect for the gen spindle. The spindle OK needs to be set to Norm OPen.

Thanks for everybody’s help.

https://youtu.be/oSL5cSEpJtY

[Devlin]

Actually I think the spindle ok is not working correctly. Having it normally open is just bypassing the check. Will have to figure it out.

[maxmeaker]

I'm also trying to wire an AVID CNC (formerly CNC Router Parts) spindle kit to my Acorn just like Devlin was inquiring about. I followed the pin-out conversion previously mentioned in this thread (see attached image for reference) but when I first power up my machine, I immediately get a Spindle Fault.

I'm not really sure where to even start in trying to troubleshoot this. Any suggestions? More info on the type of VFD used in AVID CNC's spindle control box can be found here: https://www.cncrouterparts.com/22-kw-pl ... p-353.html and I've attached a photo of the VFD's model number.

I'm also curious about how the Acorn Generic VFD schematic shows separate outputs for Spindle FWD, Spindle Reverse, and VFD Reset, but the previous discussions in this thread seem to only talk about wiring Spindle FWD. Does wiring Spindle Reverse and VFD Reset only apply to certain models of VFD?

[cncsnw]

When describing relay contacts, "Ground" and "C--" are not very informative (to me, at least). Perhaps if could post a picture of the actual control terminal connections on your actual drive, we might be able to tell which terminal is the relay common, and which terminal is the relay normally-closed contact.

The Delta VFD-EL manual at https://www.deltaacdrives.com/wp-conten ... Manual.pdf seems to indicate that the relay common terminal is "RC", and the normally-closed contact is "RB".

Also, the relay is a multi-function output. What it actually does is governed by inverter parameter Pr.3.00. The factory default value is 8, so that the relay indicates a Fault condition. But it is always possible that someone changed Pr.3.00, so you should check it.

With Acorn, you do not need to make any connection to the "+10V" terminal.

[martyscncgarage]

Nearly all VFD's function the same way. Most have a fault output, usually dry contact relay, (sometimes it must be programmed in the VFD's parameter settings) and most have a reset input, that will reset the VFD if it faults (again sometimes it must be programmed in the VFD)
With respect to forward and reverse, for example. I have a CNC router, I wired the reverse input, Acorn/CNC12 can control the spindle and reverse it, but I find not likely to find it useful in a router, so it really doesn't need to be connected.

Read the manual and check the drive's configuration. If it was previously controlled with 0-10VDC input, its probably good to go, you just need to figure out what its min/max RPM is and set that in the Wizard Spindle sub-section, and wire the inputs. I always take a picture of how the VFD was wired prior to the control upgrade, crack the manual open and see what those inputs and outputs are.

Marty

[maxmeaker]

I checked parameter 3.00 (Multi-function Output Relay) and confirmed that it is set to the factory default value of 8 (Fault indication).

As CNCSNW suggested, relay common terminal is "RC", and the normally-closed contact is "RB".

What threw me through a loop was that AVID's Spindle VFD package came pre-wired to the "RA" terminal (which is the normally-open contact), and that is what I had connected to Acorn's Spindle OK. I guess since they advertise this VFD as "plug and play" for their controller, I had assumed I wouldn't need to change any wire connections on the VFD side of things.

I went ahead and switched the wire from "RA" to "RB" and now everything is working . In case anyone tries to do this in the future and finds this thread, I've attached an updated wiring chart and images.

Thanks for all your help!