Best posts made by Touchthebitum

I found the problem. It was a loosen screw on one of the x/y motors.
Thanks for your help.

@fcwilt
The solution was M226 instead of M600.
I had to edit and place M226 at the right layer.
I kepts my pause and resume files and it worked.
Thanks for your help

I use 0.8 nozzle size too for large prints. I have this problem too but it seems that acceleration may be modified. Be careful with speed because extruder motor has to provide more speed for the print. So try to lower your print speed