as a laser operator who cuts 304 and 316 stainless all day we use nitrogen as assist gas. no HAZ to speak of. only problem i see would be slight warpage of your plate which could be flattened using a roller after operation is complete. each 3/8 hole would take 2.0 seconds including pierce and...
Keep in mind my machine has a 4000 watt resonator but i use a 5,0" lens to cut anything below 0.1875" your focus point seems about right but your gas pressure seems high to me 2.0mm nozzle at about 12 bar should be ok. is your top edge just sharp or is there really a burr? I personally have...
I have never cut 0.312 but this is my condition for 0.375 hope this helps
FEED 15 ipm
PWR 4000
FREQ 2000
DUTY 100
GAS PRESS 0.6 Mpa
gas shop air
focus -0,25
