Trying to cut 1/8" thick aluminum with 1500 watt fiber laser

[kmmp]

Good Evening, I bought this 1500 watt fiber laser and have no issue cutting mild steel nor stainless up to .125 with no burrs, I am trying to cut 1/8" 6061 aluminum and no matter what I have tried I still have exit side burr about .015 to .030. Here is what I have tried

1.5mm,2.0mm, 2.5mm & 3mm nozzles: 2mm best so far
Nitrogen at 10 bar, 15 bar, 20 bar & 25 bar: 20 bar current was best
Nozzle height set at .015, tried .028, .035 and .04 and was bad
Focus point at -.119, -.09, -.08, -.07, -.06 & -.05: -.060 best result
Cutting speed at 2.1" per second current tried 1.3, 1.5, 1.8, 1.98, 2.1 and 2.4, 2.4 would cut must be to fast

Just trying to get rid of the underside burr, accuracy is cutting +/-.002 right now but burr is issue

Thanks for all the help and insight in advance!

Thanks,

Rick

 

[laserkatana]

You may want to adjust your focus (go deeper into the material) but with 1500 watts it's kind of limited. What lens are you using to cut it? 7.5"? Have you tried using a 5" lens instead?

 

[krugtech]

try cutting with air. We use a 6 or 12 cylinder cradle to test. if it works, then you can buy an expensive compressor.


Chris Krug

http://krugtech.com/

Maximum Up-time, Minimum BS