Hi guys.

I tuned my servos using this great site (cnccookbook.com).
The motors now are quieter BUT something is happening and I don't know the root cause,

It can change directions with nice acceleration, so I can keep reversing directions the whole day without any fault (based on 40mm travel each direction)
BUT
When I try to jog the axis for long distance (>100mm) the motor stops with fault condition. Is that noise disturbing everything? Or can be a CPR + computer hardware + wrong software parameters. Even using rapid speed about 1000 mm/min I still had this error.

Below, my machine parameters and Mach3:
Attachment 241376

Update1: I will check my ESS setup, I may have 256kHz - and based on the following link that will create some problems:
https://groups.yahoo.com/neo/groups/.../topics/140122