Hi,
still can't think of anything that would tie them together.

I'm thinking you may have a bad case of midband resonance which can and does produce some wildly unpredictable results.
What stepper drivers are you using?
What microstepping regimen are you using?
What power supply, voltage and type, are you using for the steppers?

Craig

Hi,
never thought to ask are you using a parallel port?
Can you post a screen shot of the DriverTest.exe page?

Craig

USB connection.

It's a Chinese Special, so I'll have to tear it apart to see what's inside I guess.

I have the same behavior.
All movements without M3 Spindle command lead to interrupted movements. Same for the "gotozero" button.
strange.. did anyone solve this issue meanwhile?

Thanks!

Georg

Hi George
I never resolved this issue. Till today its doing the same.
I'm chalking it up to cheap Chinese driver🤷

What machine do you have

thanks for your reply!

I have an acctec 6012 with delta servo motors and the newest XHC Mach3 motion card. I guess it's a problem of the motion card.

I have an ethernet AXBB-E controller from cncdrive, but I'm not sure yet if it's worth to install. theoretically just wiring, but you know, inc. troubleshooting e.t.c it may take some days...

Georg

it also seems to be impossible to run the verify axis script with the xhc motion controller.

( to check the machine for accuracy/ step losses)

I tested another computer, now it works smooth.
changing the output settings to the values as set in the factory file from XHC also helped to improve the behavior on the old computer....