I’m not sure if I should post this here or not, I’m not sure if I have a problem yet or not.
I was engraving on 1/4th clear acrylic, which I’ve used this same material many times before without incident, but this time I got a overheated error and the gf stopped printing on its own. I got up to look at the print to see that there was a small fire around where the print head was and the acrylic had melted.
Now I’ve seen my share of little flames here and there, but this is the first fire I’ve seen. And it was still burning until I opened the lid and blew it out.
I’m only speculating here, but the only thing I can think of is that the print head must have stopped moving and was continuing to engrave the same spot until it got too hot and caught on fire. You can tell from the photos that the melted area is pretty large so it must have been there for more than 5 minutes or so.
I don’t have video of this… I wish I did. I always watch each cut/engrave at the start to ensure things are going as they should and this time was no exception. And then I usually leave it alone and check on it once in a while… but never more than 10 feet away at my desk. So I know the print or engrave started fine.
The print head was, and still is as I write this, very hot. Too hot to even hold by bare hands. Doesn’t look like anything melted on that. I notice blacken areas where the sensors are but those usually get dirty and can be cleaned, so hopefully this time is no different.
I also removed the lens and mirror from the print head and don’t see any issues with those either.
I’ll report back after I let things cool down for a few hours, and try to start the gf up again. I will do a simple cut to see how it goes.