On my 4000 Watt Trumpf 3030, Cutting with a 5" head, 1/8" SS with Nitrogen assist, My cutting head lense gets destroyed after no more than 10 minutes of cutting. Every Time!
This only seems to happen with .125 stainless steel. (304b) . Even with Trumpfs technology table unmodified, I am still losing lenses to spots, then focus goes out the window.
Does anyone else experience this problem? And what can be done? I've tried many things over the years (nozzle standoff, wattage, focus, speed, gas pressure, nozzles, boron nitrate on the sheet. Nothing helps, and this only happens with 1/8 ss and 1/8 galv.