I recently built a laser engraver using a 5w laser module from ebay and a pretty basic cartesian setup driven by a RAMPS board running marlin. So far I have calibrated it to work pretty well and can do simple jobs like cutting out a shape from 3mm plywood without completely decimating the edges, a problem that was helped significantly with the addition of a air assist system courtesy of thingiverse. My current challenge is getting rasters to do what I want. Currenly i’m printing on lite pine plywood that has been stained to an oak like texture using instant coffee (it gives me much better results and looks great) but i’m having issues on both plain and coffee’d wood where either it only prints the trace of the image as if I had traced the bitmap in inkscape when I would really like it to display some darkening on all non white parts of the image. For calibration I have been burning the starbucks black and green logo as seen below and rather than burn through all my thin wood i’d really like to hear some tips on getting nicer rasters.