Quote Originally Posted by CnCAbc View Post
How to sort them out?
The only things I'm sure is not the issue, are the voltage to steppers and coupling, the seems/feel tight/fine.
Well you was sure the steps were fine before. Post a pic. of the machine also what drives and what is the voltage supplying them. What is the acceleration settings in Mach.

Have you measured if the actual distance is the same for X100 and Y100

We don't have crystal balls to see these things.