My hotend got stuck in the A1 and I couldn't get it out

Bambu Lab AMS Troubleshooting
1

I changed my hotend yesterday to the 0.2mm to print some tags, well today when I tried to switch back to the 0.4mm (so much faster) the 0.2mm was stuck. I know the printer says to remove the hotends cold but I ended up having to turn on the printer turn up the temp then when it loosened I turned the printer off to take it out. When I took off the silicon sleeve the filament had collected in the sleeve and is now all over the hotend.

What is the process I should have used, since the wiki says to change it cold? What I don’t want to do is break it. I’m new to this 3D printer but not to 3D printing itself been doing this for 3 years but my last printer was not like this so everything is different. I’ve included some pictures of the hotend (what it looks like right now). Interestingly enough my print job finished without error or issue.

My last question is how do I clean the filament off of the hotend?

3dprint5
3dprint51409×1879 246 KB

3dprint4
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TIA
Darklaya

1 Like
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I’m curious about the best way to clean the nozzle too.
I’m finding that the tolerance for seating the nozzle is very tight and even the slightest amount of crusted filament makes it hard to seat the hot end and get the clamp closed.
Back in the day, we used to use toluene with the screw in heads. We’d let them sit overnight and then just brush them clean. Is this method still doable with the BL hot ends? Would you want to take care in not submerging the heat sink and/ or magnet?

3

I have had my inits poop themselves a few times. Heat up the bed and the nozzle. Push the head down and isolate it so everything warns up.

Now get some paper towels and a pair of needle nose or equuv. Ball of paper in the pliers wipe. The plastic will greatly preferentially stick to paper. It takes a while, don’t hurry be aware of rhe squidgy bits on top. Wires and such. All of which will be a bad sat to poke too hard.

Luck