Geeetech

Hi, I do not know what happens to him that he does not obey orders in the repeated host, and in the easy print either.
I send you a link to an impression that you try the other day, the quality is not bena, but you can see what it does:
https://www.youtube.com/watch?v=xd0nnFj-RuI

hello, my problem is that the Z axis, when it makes the home (not always low), does not stop, and keeps going down to block diagonally.
Is there any way to automatically stop at home?