Dear All!

I've got the following situation. Milling machine has CNC Fanuc 0iMC and linear scales. I was measuring the machine accuracy using Renishaw Ballbar.

So when the machine has only ENCODERS activated after some measurements and corrections of parameters 1851 and 1852 I had Backlash error about 5-7 micron, Reversal spike - about 10 and out of roundness about 12-15 micron.

After LINEAR SCALES activation and setting 1851 and 1852 to zero Backlash error became even less but Reversal Spike and Out-Of-Roundess increased too much - about 20-25 micron.

Renishaw help explaines that there is some slow reaction to reverse of motion direction.

Do you have any ideas about this problem?