Given my earlier confusion about beam paths, I found this article to be timely and relevant:
Nice link! Really clear explanation.
I’ve now read the Adafruit PDF that I linked below in this post. It’s… OK. It’s pretty Epilog-centric, so… maybe skim it first.
According to Meow Wolf (which is an art installation in Santa Fe, NM, USA), Adafruit has a good write-up about laser cutters. Here’s a link to the PDF…
(I haven’t actually read it, but I figured this thread would be a good place to share it)
Meow Wolf Wiki entry about laser cutters…