Issues with Mizar S

[frank_p]

Hello *

Yesterday I got my new Mizar S. Assembling is as easy as it could be. But when operating there is an issues I do not understand.

The print bed is not moving in y-axis in back direction when I say "Home" - the head goes home, but the bed stays where it is.
Using the menu "Move" has the same effect! X and Z move without any problems. Y only moves to the front, but not to the back.
The only chance to move the bed manually backl is to "unlock motors" and do it per hand.

Anybody can advise what I am doing wrong?

Thx in advance

frank