Filament bleeding out of nozzle when heating
My prusa MK3S+ 'bleeds' filament when heating up. I replaced the hotend, thermistor and nozzle. I did a factory reset, software update and PID calibration, but the problem persists. When stopping a print, for instance, the filament keeps running out of the nozzle for about 10 seconds. When no extrusion is taking place.
What could be the reason for this ?
How are you drying your filament?
Cheerio,
RE:
Thank you for replying. It is not about the filamet beeing wet. I have more 3D printers and if I try the same filament all is well.
RE:
For whatever reason my Core One leaves a 2 inch trail of filament dangling after a print, too. I think its a combination of things to do with how the printer parks the filament: ramming then pulls it out of the nozzle which allows air into the chamber that then heats and forces whatever melt is in the nozzle CHT/HF orifices to feed downward with gravity. A SWAG, and leaves other questions, but it sort of explains why. It does it with several filament types, PLA, PETG, PC-CF, even fresh from the bag Prusament PLA did it. And all leave the same two inch dangle.
But wait - you are using a Mk3, sans Nextruder? Then nozzle is too hot or filament is damp. About the only things that will cause it.
RE: Filament bleeding out of nozzle when heating
Thank you Tim, for taking the time to react on my post. I tried brand new filament from the box, not wet and the same thing happens. If I extrude a bit, and the extrusion motor stops, it keeps seeping out for more than 10 seconds. I changed the hotend (pla) temperature to 190 c. and still the same thing happens.
I cant wrap my head around it. Tried so much and still the same thing happens.
I tried brand new filament from the box, not wet
New does not necessarily mean dry - this really is a typical symptom of moist filament.
Cheerio,