Centroid Community CNC Support Forum

Hello and thanks for having me and thank you in advance for assistance!

I will update this with images and videos as recommended in the sticky thread on new builds. I just finished the buying portion and am waiting for all the parts. I do have the Acorn unit and some other parts. I will do the bench testing this weekend I think.

My first question is which schematic would be best suited for the build?

Here is what I have so far:

Weiss VM25L I have been running manually for a few years which I have done many upgrades to.
Pro Cut CNC double ball screw kit.
4 axis Acorn Rev4
KBSI-240D Signal Isolator.
24V Fixed Power supply (1000w 41a)
Lenovo ThinkPad T470 Touchscreen.
Automatic Tool Setting Gauge for Z.
Touch Probe.
1000ppr encoder with friction mount (I wanted to use the already in-use hall but think that is a bad idea if even doable) for spindle control.
DB9 and DB25 Breakout Boards.
Solinoid and lines for Mist.
Rotary 4th Axis with a tailstock(Nema 23 - Ratio:6:1, STEPPERONLINE - DM542T ).
STEPPERONLINE - Nema 34 12Nm 6a for Z with a DM860I.
STEPPERONLINE - Nema 23 3Nm 4.2a for X and Y with a DM542T.
Inductive Prox switches.

I went down the wrong Rabbit Hole on Spindles and I am backing up and punting for that. On the mill I already upgraded the drive and spindle to 3000 rpm and it has been great but found a killer deal on a PDS Colombo RV 90 Spindle (7.5HP 5.5kw 18-24k RPM ER25) and the VFD and other parts to convert but I honestly don't think I will be doing that type of work on it, just basic Aluminum work such as 80% lowers and parts. I did consider bolting it to the side and running dual spindles with one just as manual control. Any input on that would be much appreciated.

I will update with plenty of images. I have two lathes I have converted to semi-CNC with ELS that I may go acorn on after I get this one sorted.

There's a wiring diagram for the DM series drives, S14976. Don't wire up the enable lines as the drives are enabled by default. Also, dont wire up the alarm circuit at first, get the drives working first then wire up the alarm circuit. Wire ONE DRIVE at a time and get it working then simply duplicate it over and over.

CNC12 does not support laptops so if you ever need support from Centroid they wont offer it because laptop are not recommended. Please invest in a dedicated PC to run the machine.

Good luck with your build.

Thanks so very much!!!!

I have an I7 desktop as well but space is premium so I can use that just as well.

ShawnM wrote: ↑Mon Dec 11, 2023 4:52 pm There's a wiring diagram for the DM series drives, S14976. Don't wire up the enable lines as the drives are enabled by default. Also, dont wire up the alarm circuit at first, get the drives working first then wire up the alarm circuit. Wire ONE DRIVE at a time and get it working then simply duplicate it over and over.

CNC12 does not support laptops so if you ever need support from Centroid they wont offer it because laptop are not recommended. Please invest in a dedicated PC to run the machine.

Good luck with your build.

I figured it out. My 24v jumper was off...


I am a little perplexed. I did the bench test last week and the drives, e-stop and limit switch worked but today I installed the ball screws in my machine and wanted to use z to raise it and now with the same config if I leave e-stop and limit switches to NC nothing works and I get Error 327 fault: job canceled but if switch the setting over to NO it all works except the e-stop and limit switch. I cannot get the e-stop or limit switch to work no matter what I try. I have tried bypassing and going straight to common but still no go. Any ideas?

I used the PLC diagnostics. It will enable all the outputs but none of the inputs work, the led's never change to green.

Scratching my head on an issue and would appreciate a direction to look in. My circles are not round and it seems to just deviate a little in the same spots no matter what I try.

I used an indicator to measure backlash and have it all removed. I did this several times to be sure and they came out the same. X is a lot at .0562 but y is .003 and z is .004. I tried changing steps just to see if it mattered. I started with 4000 then 3200 and now 1600. I have the driver's set to max current for motors. I have the ratio at 5.08 using 5mm double ball screws.

Any idea where to look next?

Thanks so much.

I think I ruled out backlash. I redid it again and rechecked my gibs. After that I did a manual run just looking at the dro in cnc12 and made a box and center point and went back and forth a lot and it seemed to track fine.

post a fresh report.zip and the g code programs you are using and commenting on

make a photo album of the machine and the cnc controller cabinet wiring etc.. and all accessories and post link to the photo album here.

how did you measure backlash?

review.
http://cncsnw.com/LashHowTo.htm

https://www.centroidcnc.com/dealersuppo ... oads/1.pdf

Thank you all very very much. I still plan good pics and videos I'm just hit and miss for time and dealing with my daughter passing.

I got to the bottom it. I mistakingly left out the retaining bolts that snug up the ballscrew. I sorted that and it works perfectly.