DIY 40W CO2 CNC Laser : 9 Steps - Instructables
Then we move to the laser, here I chose a 40-watt tube, I ordered it from aliexpress, delivered pretty fast and everything was fine, so do not be afraid to order, after some time, I would probably take a more powerful tube, probably 80w, this will allow you to cut plywood up to 10mm, and maybe thicker, with a 40W laser you can cut materials in the about of 4mm, then you have to lower the speed and increase the power, which will negatively affect the life of the tube.