I did a print with NinjaTek Chinchilla, but the filament got stuck and started coming out to the side of the extruder. (I was experimenting with different speeds to see how fast I could print with Chinchilla.)
After I opened up the extruder and cleaned it, I reassembled it. However, the hotend was clogged. I started the printer and set the hotend temperature to 270°C to try to melt the filament inside the hotend. Instead, I got a burnt smell, like burning electronics. It didn’t smell like the normal plastic-melting smell, and no filament was coming out.
Does anyone have any clue what the smell might be? Here’s a picture of the hotend. I’m concerned about the two black cables. Are they supposed to be stripped like that?
I changed the hotend to a brand new one and yes the cables should be stripped like that I learned.
I cranked the temperature up to 270 C and still got the burnt smell. I assembled it using the directions from the Bambu wiki, using thermal paste and all that.
Update:
Just took apart the extruder, nothing funny there.
The burnt smell is only there when the hotend is heated to high temperatures.
Same problem. I posted this on reddit but it keeps getting filtered.
I recently clogged my X1C extruder and had to take everything apart to unclog, both extruder and hotend. I unclogged the hotend by burning the end of the small Allen wrench that comes with the printer, stick it in the clogged part of the hot end, wait a few minutes then pull out. When the allen key first touched the clogged filament, it burned and gives off strong burning smell. This method is suggested by bambu wiki
Now after putting everything back in, the inside of my X1C smells like that, but much less intense. If glass door is closed, I do not smell anything. Before the clog, I never opened the door and tried to sniff to see what it smells like during the print so I do not know what it smelled like before. I only noticed today after doing regular checks.
I also have an A1 mini and it doesn’t smell like that, but it could also be due to it not having an enclosure. The smell in the X1C quickly dissipates if I open the door.
Can someone confirm if this is normal or try to sniff mid print to see if there’s a slight burnt plastic smell? Any suggestion would be greatly appreciated.
TLDR; Unclogged hotend on X1C, inside enclosure smells like slight burnt plastic afterwards,
Once plastic starts thermally decomposing all bets are off on how it will behave and smell since it’s no longer the same plastic it used to be. I don’t have any experience with that filament but you will probably need to scrape and remove all burnt traces of it on stuff that gets hot to get rid of the smell.
With my X1C I just smell the waffle-like PLA and kind of acrid ASA smells but neither has that “burnt” kind of smell. Plastic fumes can be from different chunks of the plastic molecules and can condense/deposit on all surfaces it touches. On glass it can look like a light haze but can also be a little oily.
A good and careful cleaning of all the interior surfaces should help but there’s lots of crevices and other places that you probably won’t be able to get to. Odds are you won’t get rid of all of it and it will just need to evaporate but that is very slow - and you really want to minimize all exposures to hot plastic fumes. Those are molecule fragments and other things trapped in the plastic and not particularly good for you. Obviously if cleaning the insides you have to be careful and use no more than a damp cloth or towel and while unplugged.
