There seems to be a lot of information around on aligning the mirrors, but very little on adjusting the head to be perpendicular to the work surface.
I have noticed on some of my acrylic cuts, some edges seem to be slightly offset ie very slightly angled.
I would have thought that if it were a matter of the head not being perpendicular to the work surface that the entire cut piece would have uniformly angled edges right round.
Mine only seems to be certain edges, some of the time. Is this possible just material not sitting flat on the surface and material irregularities?
What methods have you guys used?