Maslow losing its path

Hi, i tried to cut some profiles and i got a problem. You can see it on the pictures. If i am right, i think the right motor will cause this problem. Because it only happens on the right side. But why? I use the same G-Code different times, sometimes its ok, sometimes it makes the mistake and goes the wrong way. And it doesn`t make a difference if I cut the profile on top or on bottom of the work area. I use GC 1.04, an Firmware 1.04…Could updating these be a solution? Would be nice to here from you, Axel


Could you circle the problem in the picture because I’m not sure what I should be looking for?