I have the Neje A40640 dual diode on my CNC, seems to be similar in power to your unit. I have air assist (25-40PSI), which I believe is a must for cutting, it blows away the char debris allowing for a deeper laser penetration per pass. I’ve cut luan plywood (5mm) from Lowes, baltic birch (3mm) from woodpeckers on amazon, walnut/pine/maple ply (5mm) source unknown, and oak/mdf/oak ply (5mm) source unknown.
- luan ply 5mm cuts clean at 220mm/m, 85% pwr, 2 pass, fine focus, 0 Z offset, 1.5mm Z offset step-in/pass, tabs 2/shape @ 0.1mm size, air 40PSI, kerf offset 0.1mm
- baltic birch cuts clean at 220mm/m, 85% pwr, 1 pass, fine focus, 1.5mm Z offset, tabs 0.1mm, air 30PSI, kerf offset 0.1mm
- w/p/m 5mm 300mm/m, 85%, then same as luan
- oak/mdf core 5mm 220mm/m, 85%, 3 passes, fine focus, 0 Z offset, 1mm Z offset step/pass, then same as luan
*note that a recent post has a good price on baltic birch and perhaps other plys, Purchasing Material
*note that I’ve had some luan ply which has a very tough glue between the plys, one which diode laser (445nm) does not penetrate no matter how many passes.
*boxes.py is a great webapp that generates dxf or lbrn2 files for many open and closed box objects with finger joints.
*elevate your material from any solid base workarea so that the hot gasses from the cutting process can exit the bottom of the material, makes for a cut with less power. Honeycomb, nail board, or I use an old steel bbq grill rack which allows for magnets to hold the material flat since these dimensions tend to have some warpage at times.
*ventilate/evac fumes, don’t breath this stuff.
Of course your settings may vary, but this is a starting point, fine tune from here.