So I can hopefully let you know tomorrow 🙂
I just got my laser up and running. 3.8w from jtechphotonics. I can say its a powerful little bastage.
I cut (CUT) 1/4″ birch plywood tonight with 6-7 passes 1mm deep at full power. Clean through, parts dropped out the bottom (it was slightly elevated).
Im engraving on solid oak right now and the default settings for the jtech laser etch program have the max power on engrave. im down to 70 as max power on my 3.8w laser at 2x the normal speed and thats about right..
im buying some acrylic tomorrow to test. both cutting and engrving