PID output not zero

Thanks for your suggestion, but that doesn't really solve the problem I think. I just sets the PID output to 0 while there is still a small error. The PID loop should correct the error and then go to zero.

Just did some more testing and tuning. I got a pretty nice f-error graph on all 3 axis. Up to yesterday I had only used the x-axis. It seems that all 3 axis have the 0.002mm offset/error. I tried with some I and D values, but those didn't improve anything.

I don't think this small error will cause any problems during machining, but still it looks weird. If anyone has a suggestion what might be the cause, let me know.

If you have enough I term, the error will get corrected but you will have dithering.
Actually it will get corrected even with a small I term but it may take a long time...
(minutes to hours)

Firehunter wrote:

I don't think this small error will cause any problems during machining, but still it looks weird. 

Set the GUI to display commanded position instead