Bad Laser cutting on Aluminum 3KW

[Daniel_Laser]

Hi,

i have a Mitsubishi Laser Machine 3KW, i try to cut aluminum with air and my dryer does nor work properly so i see water into my nozzle
after that i clean and purge the lines, now i use oxygen to can cut aluminum 0.050" thickness the machine start good but a few inches of cutting
the cut was horrible and later the machine stop the cutting.

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[underthetire]

Thought you were supposed to use nitrogen on aluminum?

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[Daniel_Laser]

I was use oxygen in the past and I was cut the aluminum, actually that option comes in me machine with oxygen or nitrogen.

Thought you were supposed to use nitrogen on aluminum?

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[underthetire]

Each machine is different, but I'd look at the optics then. The water may have gotten on the the optics.

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[Daniel_Laser]

I clean the optics but I still have the same issue, im going to try use anti reflective coating spray, yesterdar I use a black sharpie and works a little bit better

Each machine is different, but I'd look at the optics then. The water may have gotten on the the optics.

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[endurance_robots]

we tried this method, laser etching

[endurance_robots]

we tried this method, laser etching