Laser schneidet nicht gerade durch (Laser doesn't cut straight through)

[bernd.dk (Bernd)]

Co2 Laser doesn't cut 90 deep

Hallo, can someone help us? Our Laser doesn’t cut straight down. It Cuts diagonal. I pur a picture, that you can See what i mean. Please help us. We are thankful for every tipp. best regards [IMG_2333 2]

I think it’s the same problem but much worse.