learning my new 100w CO2 laser and absolutely loving it so far. I have a 38mm lens installed. air assist on. I’m seeing fine lines in my rasters on every material I’ve tried. In granite and marble I get an almost cross-hatched effect. I’ve run the standard speed/power matrix on a dozen materials and all show the horizontal lines (parallel to the raster direction).
I guess I’m wondering if A) this is normal…but I doubt it based on projects I’ve seen on the forum and/or B) the lens installed is too fine - I’ve ordered a 50mm.
The shorter length focal length will be giving you a smaller spot, so you might need to lower your interval value (the gap between scan lines) or increase the DPI (which is the same thing, just expressed a different way).
I’ve made these small / coarse on purpose to make the effect easier to see:
The Interval setting under the Cuts/Layers list lights up when you select a Fill or Image layer:
Interval is the spacing between scanning lines. You can also double-click the Fill entry in the cuts/layers list to bring up the cut settings editor, and then you can change either Line Interval (same as on the main display) or Lines per Inch:
