I have recently started having an issue where files that I have run tons of times with the same exact settings are now randomly flaming up and burning. I am using Glowforge proofgrade cherry wood and proof grade clear acrylic. I am randomly getting flames while cutting and other times while engraving. These particular photos of the burnt wood are from today. The latest one on the wood was ran around 7:15pm tonight. I have cleaned all 3 fans and all of the laser windows several times. This started to happen in the last few weeks. It happens random, even on the same piece of wood or acrylic on the same night. It will burn in one area and then cut and engrave cleanly in another, as you can see from the acrylic sheet. But it’s not consistent. It’s happening pretty constant now. I’m out of ideas on how to fix it. I even tried switching the lens on the laser head to see if that would resolve it. It did not. Can I get some help please?
This particular clover is a deeper wood engrave and then I set in a separate green acrylic clover. I’ve ran this particular file cleanly last week making about 60 pair with out an issue. Then I needed to restock and now they are burning and randomly cutting off center.
