"Cut indicator" for 40W Laser Cutter

thingiverse

This jig will securely position the red laser diode at the precise angle to demonstrate exactly where the laser beam will cut. In some cases, a 6mm drill-bit must be carefully threaded through the angled hole if it becomes too narrow. To further secure the jig, tap a small set screw into the side-mounted hole measuring 4mm in diameter. I found that applying glue to the lens threads on the diode provides stability by eliminating any unnecessary movement.