Prusa MINI Unable to Purge Filament Consistently
I've had my Prusa Mini for about a year now, and I've been really happy with how it's been working. This afternoon I started a print, but when I checked back in later, it wasn't extruding any filament. The print was partially done, but at a certain point it seems like the filament just stopped extruding. I cleaned the nozzle with an acupuncture needle, and tried again with the same result. I then tried manually pushing the filament into the extruder (while heated up), to see if that would clear the nozzle. Temporarily, that seemed to work; the filament purged nicely, but when I started to print something, nothing would come out. I repeated the process of manually inserting the filament a few times (often with a lot of filament), each time with the same result. I'm quite confused about what the problem would be, and any help would be greatly appreciated.
Best Answer by mark:
It sounds like the PTFE tube in the hot end has worn out. Try replacing it. A spare should have come with the printer. I consider them a wear item and replace whenever things get flakey and the head appears clogged and can't be fixed by the needle or cold pulls.
https://help.prusa3d.com/guide/how-to-replace-a-hotend-ptfe-tube-mini-mini_119449
Regards,
Mark
RE:
It sounds like the PTFE tube in the hot end has worn out. Try replacing it. A spare should have come with the printer. I consider them a wear item and replace whenever things get flakey and the head appears clogged and can't be fixed by the needle or cold pulls.
https://help.prusa3d.com/guide/how-to-replace-a-hotend-ptfe-tube-mini-mini_119449
Regards,
Mark
Check the diameter of your filament - if you have a thin batch (not so common these days but it does sometimes happen with cheaper spools) it can slip in a normally pressured extruder - if so tighten the idler and enter the true value in the slicer.
Cheerio,
RE:
I have a same issue, but my Mini is only one month old.
When i start a print with Prusa PETG (it is a 12 hour print) after about 2 hours there is no filament extruded and can't unload the filament.
I can pull out the filament from the hotend but it is very hard to get out from the long PTFE tube. Also the filament is stuck in the extruder and i have to deassemble the extruder to get it out. Could it realy be, that the small PTFE tube has to be replaced after such a short time?
RE: Prusa MINI Unable to Purge Filament Consistently
Thanks for the help! It seemed like the problem was the PTFE tube; when I replaced it my printer worked perfectly.
RE: Prusa MINI Unable to Purge Filament Consistently
I also noticed, that the filament was so deformed, that it was hard to get it out from the long PTFE tube.
It seemed like the problem was the PTFE tube; when I replaced it my printer worked perfectly.
Did you replaced the small one or the long one?