komar1970,
This problem is not only with this machine, it was with every my machine
You have numerous machines and computers. Can't tell if you ever realy resolved any of the posted problems you are having. Some of the threads seem like they never come to a conclusion. I am not sure which machine or computer you are using at any given moment. One would think that after ONE YEAR
you would know how to set the steps per unit, be able to confirm the steps, set backlash ( backlash dosen't go away or get better), and understand if you deviate from the calculated how that relates to axis travel. Sorry if this sounds harsh ....but can't help fix the door hinges when the door is swinging back and forth.
So keep to one machine, computer, xml file used for the setup, the type of screws ( are they rolled / precision ground / how supported / etc.).
Maybe I am missing something,
RICH