Thank you so mutch!
I will try it asap.
Also, have you any idea why this value is correspond to the real distance of the tips, but printing with offset? And if I print something the result XY dimensions are 5% bigger. Maybe this is the same problem. Other issue accuring when the head comes to front left corner, before print stars: the belts gives crash sounds, like overstepping the hard limits...
Is it possible to change the step values of the xy motors, or it is only firmware problem? I have the latest firmware...
Thanks for your kind ansver,
Regards,
Greg