Using a CNC
Milling 101 Understanding Milling Bits
Casio XJ-A140 video projector blue laser source–24 x 1.5 Watts 445 nm blue laser diodes collimated
NUBM44, 5W – 7W 450nm laser diodes
-Reported to have poor beam quality.
-focusing: the G2 is the best lens; fine tuned the Cylindrical lens to lens distance, critical to achieve the minimal divergence. Just a .1mm movement will cause a change in the Far field divergence.
-lens: 405nm/445nm/515nm Laser Lens/MP9x9mm/Laser Collimation Glass lens 1 pcs
-lens: aspherical single element lens gives smaller spot w/ some power loss; three element lens which has higher optical power loss but gives an even smaller beamspot
“We have our focal distance set at 2″ with this build, but by our experience, 3″ distance has worked out the best for image engraving with the 2-3W LD’s.”
NUBM07E, 2.9W 445nm laser diodes
Nominal Ocular Hazard Distance for 6W @ 2mR is approximately 1000 feet
900mW 405nm, single mode diode, $90 ebay Can be focused to a much smaller spot
Good spot size: NDB7875, driver at 1.7a-1.8a max with a 3 element glass lens or J-Tech’s lens
445nm laser diode 2W driver, pdf
Router/Spindle Variable speed control
Computer power supply, 850W, 78A at 12V, $70