I found this question, laser is engraving the negative space in the close queue this morning as being off topic. I was about to respond, and through I'd look at the community view on meta. I found this question and answer: FDM printer that can also mill and engrave -- what's in scope?, and this META discussion Is it possible to expand the scope of this site? which suggests that it would be on topic.
What should I do with the question? As a relatively low-reputation participant, I want to defer to the greater experience.
Many of the problems of 3D printing and laser etching are similar, but not all. The equipment is much like FDM 3D printers, with some differences. How finely should we diagnose the nature of the problem before deciding if it is on topic?