CNC Y-axis error

hadcom wrote: If i just could say to the machine net y-pos-cmd => pid.y.command + 0.1 it would be perfect but unfortunaly it's not that easy to add 0.1mm

Actually, it is very easy to add 0.1mm. But that would just move the whole part 0.1mm.

Does the Y PID have any deadband set?

[AXIS_Y]
MAX_VELOCITY = 116.666666667
MAX_ACCELERATION = 750.0
MIN_LIMIT = -0.01
MAX_LIMIT = 450

[JOINT_1]
TYPE = LINEAR
HOME = 0.0
FERROR = 10.0
MIN_FERROR = 1.0
MAX_VELOCITY = 116.666666667
MAX_ACCELERATION = 750.0
# The values below should be 25% larger than MAX_VELOCITY and MAX_ACCELERATION
# If using BACKLASH compensation STEPGEN_MAXACCEL should be 100% larger.
STEPGEN_MAXVEL = 156.25
STEPGEN_MAXACCEL = 937.5
P = 50
I = 0
D = 0.001
FF0 = 0
FF1 = 1
FF2 = 0.00073
BIAS = 0
DEADBAND = 0.001

And yes that is what i need, if i put in CAM a square with dimensions X 10 and Y 10.1mm i get Exactly 10x10mm and that also true for any dimensions like X500 and Y500.1mm i get Exactly 500mm in X and Y there is like missing 0.1mm but i dont know how to program it..

You could try setting the deadband in the INI to zero. But I doubt that is it.

I would comment out all lines like:

setp pid.x.maxerror 0.005

And then plot the following error

Have you checked your spindle/tool for run out, that could cause it to mill oversized?