Qtdragon_hd Zero button not zeroing

yes I bet that's it. I notice you are using metric, so .006 is pretty small.
I'll try to track down where the rounding error comes from.

Thanks Chris,

I also notice previously I had 0 as deadband and the steppers all worked well. With 0 now they hunt 0.000 to 0.001 so are contstanly vibrating. I had to set the deadband to 0.001 to stop it. There are 6400 pules per rev and each rev is 5mm.

If you need anymore info please let me know.

Regards

Initialling I was thinking this was simply rounding error, but I think it is something else. The fact that I cant set the Zero properly tells me there is some underlying problem with my configs of some thing the way calulations are being done different with openloop steppers.

Some further info. Always getting following error on Z axis (Joint 2). I have upgrade the PC now and have done all the tuning with the Os and interrupts.

I have been a week now, working every day to try and get this going after upgrading from from I think was 2.4, which seemed to work flawlessly for a good number of years.

I have also tried going back to 2.8.0, but still get the errors and the Zero button not working correctly.

When running a short program with the Z going up and down to cros the top of clamps the program will never run through, it always stops with a joint following error.

The other error i am getting is if I set the Deaband to 0, which it was the steppers are always vibrating.

Wondering if there are other hal file setting that have chnage since the earlier version.

This is driving me insane.

Picture of screen hot in next message showing that the position cmd and the fb are the same.

All help would be greatly appreciated.