Laser engraver/cutter from old 3D printer.

[tonyfoale]

Just remember the cardinal rule of working with lasers:

The unit that I am using has an eye protection cover, which is a first line of defence. I always wear protective glasses when using the laser. The 3D printer originally had open sides but since taking the photos in the post I have closed in the sides and top for two reasons. One, to prevent accidental eye flashes and two, I added an extractor fan to get rid of the fumes from burning noxious materials like paint, plastic and wood.