Centroid Community CNC Support Forum

Thank you for the reply

I have tested in all different ways

Swop motor to the other Driver
Checked CNC12 settings are identical

I have also picked the motor up and hold in my hands and the one are still louder than the other one

Even if I switch power off and turn shaft with hand there are a ...

Hi Everyone

I just want to get some advice
I recently purchased two Nema 23 Closed Loop Stepper Motors 3Nm

Today I wired them into the Acorn CNC and found the one are louder than the other one when testing motion
Is this maybe normal or must I take it back to the supplier and exchange it?

I have ...

Latest Report

I have just tried someting
I changed the Network card setting to 100mb Half Duplex as per the post

Then the Stress Test Fails

I changed it back and had to restart PC and Controller then the Stress Test have Passed again

So the Report have that FAIL in it

Things that will cause com errors

1.) using a RJ45 a bulk head connector (Using only the supplied BLUE Shielded Network Cable)

2.) Using a regular non-shielded Ethernet cable or the shielded cable is bad, try another shielded cable as a test. ( I will get another cable and swop it out to test ...

Ok I have just done the STRESS Test and the results on all of them are "0"

look at the error log in the util menu

did you run the com stress test? its a g code program, load it and run it.

the errors you have are most likely firewall or cable related, follow the details in the link i posted.


Hi Cnckeith

I have watched the video again and double check that all the ...

I have tested the continuity from the machine to the stepper motor and to the control box PSU casing

And there are continuity between everything

I have a Lathe with ACORN board as well next to the milling machine and the continuity goes between the two machines as well

I think it might be the ...

as Uwe pointed out, you need to fix these com errors first!

Here is how. https://centroidcncforum.com/viewtopic.php?f=61&t=1451


2025 10:23:09 944 MPU requested resend # 99
(4) 03-17-2025 10:23:09 946 PC resending # 1676
(4) 03-17-2025 10:23:32 944 MPU requested resend # 100
(4) 03-17-2025 10 ...

Some pictures of the machine, especially the steppers and how they are mounted on the machine would be helpful too.

Acorn is very reliable, I suppose the steppers are loosing steps, or there is something slipping.

Uwe


Please find attached images

All three Stepper Motors are the same size and ...