Comparing inexpensive Laser engravers: the Decaker 1.5W laser and Eleksmaker A3 Pro 2.5W
3dpBurner + GRBL + 2.5W Laser + PWM
I have just finished it. I had only a problem with my Chinese 2.5w laser. It has a built in constant current driver and has no TTL function. So I made a simple mosfet driver to drive it via PWM. Also another problem with the laser module was the dimensions of it. It has 33x33mm outer dimension. So I redesigned the laser holder considering its original design. Also redesigned the laser holder cover. Other than these problems everything was perfect. Here is a short video that the laser is cutting a doll bed from 5mm balsa wood for my daughter. Cutting speed is 2mm/s and 1 pass.