I think I know exactly what happened but I wanted to get more info if possible.
- I started a 9 hour Print just before going to bed.
- 1 hr into the print I came back and everything appeared fine.
- I woke up to what appeared to be a simple sheer of the filament at the Feed point so the printer didn’t finish the job.
- I powered off the printer.
- ate breakfast.
- came back powered up unit.
- preheated for ABS.
8 . Nozzle - 230 Bed -100
- after 10 min I came back to only find the bed hot and the nozzle cold and showing ~20c
- I repeated the process several times to see what was happening.
< at this point I decided to take off Tool head and the hot end to see what was wrong >
Upon Examination noticed that the Heat Resistor, 4.7 Ohm was moving very freely so I decided to straighten the wires, and gently slide out the resistor and then take a look at the resistor. It appeared to be very malformed.![20150906_105122.jpg|4128x2322](upload://i4ytr2tl2WKZKyj0fWX2UM7BWie.jpeg) ![20150906_105135.jpg|4128x2322](upload://3NlsmdjGDXPTpieEEjRps7Ixxxg.jpeg) ![20150906_105207.jpg|2322x4128](upload://utYiZKtH7SXMnVQ97XyUnixGao3.jpeg) ![20150906_105212.jpg|2322x4128](upload://od4rB5WOvLutPgaAQMv1eXZUrou.jpeg) I attempted to lightly unscrew the nozzle at this point and it would not budge. It seemed to be chemically welded to the hot end.
so i tried again with a bit more force and snap.
At this point I have basically destroyed part of my hotend trying to get what appears to be a chemically welded Nozzle attached to the threads of a Budaschnozzle 2.0 Threaded Extension tube off. and want to understand why it happened.
so to fix i bought
- Nozzzle .35 - 19.00
- Heat Resistor, 4.7 Ohm - 4.50
- Budaschnozzle 2.0 Threaded Extension ( sadly out of stock ) - 11.00
- Budaschnozzle 2.0 Heater Block - 15.00
I salvaged all other Parts of the hotend minus the Tube, Heater Block, which is also chemically welded to the tube and the nozzle which has part of the tube stuck in side of it.
I know they are supposed to be replaced every so often but this just seems a bit excessive with how this thing welded together. looking for ways to prevent this going forward.
Right now I know the printer works because I installed my Flexy Dually head and it is printing just fine. I was hoping that i was not going to need to use this head right away as it was for another project but tight now it is the only head i have that works.
its at lest a semi not so expensive fix but i want to know for the future what i can do to keep this thing going as long as possible.