Why is there no standardized, well documented and easy DIY laser cutter / engraver project? We need one! Those machines could add great toolset for desktop manufacturing community ... just sayin' ... I would do it if I knew how...
Prusa crew recently released a video of their printer with laser cutter:
I searched around and found some more RepRap laser DIY projects:
This one with 2W laser diode from projector:
RepRap electronics controlling a DIY laser cutter:
RepRap Mendel with 1w laser for circuit etching:
RepRap Mendel with 1000mW laser head
Video by: http://www.youtube.com/user/TheKibuz?feature=watch
here is a link to RepRap wiki about laser cutters: http://reprap.org/wiki/Laser_Cutter_Notes
WEAR EYE PROTECTION WHEN WORKING WITH LASERS!
here is a post with information on how to upgrade your 3d printer into laser cutter / engraver:
here is home developed hybrid dual extruder 3d printer and laser cutter - the Habu:
here is DIY laser upgrade of Rostock Max used for leather etching:
If you want to make very simple laser engraver from two DVD RW drives: