Just recently finished building my own co2 laser cutter. I am from a quite poor place, so I can’t afford these expensive ruida controllers, in fact, I wouldn’t want to spend more than 50 EUR on a controller. That’s why I am using Arduino mega with ramps and running grbl on it. I had a diode laser before, and it worked like a charm. But now with co2, I can’t understand really why it is engraving like this. (Check photo) I think it is something to do with the minimal power, which I can’t change because I am not running a DSP.
As you can see, the edges where the laser has to slow down, are shaded, but they should be sharp stopped. Is it fixable, is it just trial and error till I find the right speed and power? When using constant power mode, the edges are deeper instead of being lighter.