hello,
i am a newbie machine operator on a Trumpf L4030 machine with 4 kw resonator, and i have a few things that bothers me.
the machine just arrived in our workshop in 4 months. it is built in 2000, but it is in a new-like condition, almost. the laser power goes up just to ~3860 W, and we don't know why, yet.
but my main problem is the quality of the cutting. i worked a few years on a Trumatic 180 Laserpress, so i know one or two things about laser cutting, but this machine is a little bit different. it is more flexible and easier to use, if it is set correctly.
our first major problem was with the focus point zero setting. it took a while to figure it out that the lens holder should set to 4.6 mm and there is the 0 point, and from then should set the value -3 for 3" lens, respectively -5 for 7.5" lens. with the 7.5" lens it looks OK this setting, but not with 3". with mild steel i had to let the lower with a few 0.1 mm, but with stainless steel i have to lower with 2 mm to get the cutting usable, without burr, but not perfect.
Can somebody explain me what am i missing here?
the other lens, the 7.5", as i mentioned above it looks good. i cut a few table of 5mm mild steel and the cutting edge was almost ideal. then 2 tables of 12 mm mild steel. the same beautiful edges. a few table of 8 mm the same and then i cut 10 and 15 mm mild steel. the result was almost horrible.
the parts had a thick burr, one or two edges of the part were very rough. i could observe where the cutting is rough, because it sparkled while cutting.
here is a videos, about what am i talking about.
DSCF4726 - YouTube
there were holes that wasn't cut completly, and on the video it looks fine, that at one part part of the contour the cutting looks fine (not counting the burr beside the table), but at the edge of the table it begins to sparkle and the cut become rough.
i tried so much to play with the feed, gas pressure, AutoLas position. the most better configuration can be seen on the following pictures:
could this be only because of the material?
after that i cut a table of 8 mm mild steel, and the parts were perfect.
i hope somebody with more experience can give me a few advice.
regards,
arnold