I was teaching someone how to clean their Glowforge and we discussed the mirrors. As we both also have industrial lasers, which has mirror 1 back where the tube is, mirror 2 on the edge of the gantry and mirror in the laser head, we could only account for 2 on a Glowforge.
Since the Glowforge tube is affixed to the gantry and moves with it, is the mirror on the left of the gantry behind the lens cover the first mirror? So it’s just that one and the removable one in the print head? Or is there another mirror we can’t even see in the same housing as the mirror with lens cover? Does anyone know the actual beam path?
The good thing about Glowforge vs the industrial lasers is that mirrors 1 & 2 are fixed and closed so they do not need attention or ever get dirty. The bad part is that if they ever do the machine nerds to go back to the factory. The two windows from those first mirrors to the head are however the first to get dirty and do need attention first if the cut is getting weaker.
There have been a few where the mirrors were out of alignment and missed the window when the head was on the far right side, and had to go back to the shop. I have no idea how they got that way.
I have also seen help for those with industrial lasers that had to adjust them themselves.