I am new to this and running into an issue with my 30w Raycus. I can etch the sample cards easily however when I swap to testing black Esun PETG I am getting either nothing or bubbles and melting. I have run several material testing grids through light burn and tried many settings I have found online. Nothing to show for it. I did a test on blue PLA, green, tan, and brown PETG and they all came out fine. I am at a little loss for where to procced next. Black PETG should be super easy to engrave but I cannot get it to work.
