Filament stuck in nozzle  

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tom.h8
(@tom-h8)
Active Member

Long story short, I've been having problems with jams ever since I moved from PETG back to Prusa PLA a couple of months ago. I haven't done a huge amount of printing in that time, but usually when I do I've been getting jams.

The last I solved by doing about 10 cold pulls with PLA. That worked for a week, until I tried printing one of the gear bearings from the SD card that comes with the printer. This time, as opposed to previously where the jam would occur about 3/4 of the way through the print, it jammed after printing 2 layers and the filament had cooled in the heat break. Before, the pulley would just eat through the filament.

I needed to disconnect the fan, then heat it to be able to pull the filament out. This happened twice before I did 10 or so cold pulls with the PETG, hoping that would help. It did, and I managed to perfectly print a Marvin, Benchy and Buddy with no issues.

The next time I go to print the gear bearing, it jams in the heat break again, and when I heat it after disconnecting the fan, it's stuck so badly my filament snaps and I'm left without anything to grip onto. I couldn't feed any more filament into it by hand to try and force the blockage through either.

Next, I'm going to dismantle the extruder and nozzle. How can I go about clearing the blockage once I've done that, and stop this from happening again?

Posted : 11/12/2017 11:27 am
aaron.s5
(@aaron-s5)
Noble Member

I use a cleaning filament when I change filament types. Got it on amazon. Seems to prevent this type of clogging.

Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage or loss. If you solve your problem, please post the solution…...
Posted : 12/12/2017 4:01 am
gert.l
(@gert-l)
Reputable Member

Im using e-sun cleaning filament between each swap of filament, seems to work good.
https://3dprint.com/6042/esun-cleaning-filament/

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Gert...
Posted : 12/12/2017 8:42 am
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