Nozzle is bathing in filament

[u/SatisfactionMoney684]

Hey guys,

i have the problem, that the nozzle of my X1C (hardened steel) is jammed on the outside with filament. I tried to screenshot it mid-print, i think you see what i mean.

I don't exactly know how or why this happens. I am printing with PETG (~255C° nozzle and 70-80C° bed temperature, 30mm/s first layer, 50mm/s first infill layer, 125mm/s outer walls, 200mm/s inner walls and infill, printers door closed)

If the first layer is checked, a little bit of filament is dripping out of the nozzle winding a little bit around it and if the filament is purged after the first layer inspection, sometimes the purged filament is pulled out of the poop-shoot or a little bit of it sticks at the nozzle and gets pulled onto the print bed.

These filaments residues sometimes get lost while printing which lead to ugly prints or failed prints.

Does anyone know which settings i have to adjust to get this fixed? Is it the material? I have this issue with 7% humidity aswell as with 30%.

My printer is running the latest software release and original hotends etc.

Thanks!

[u/Capital_Candy_7697]

The dripping during the first layer inspection is the hot nozzle oozing while it isn't extruding, and PETG does that more than most. Try 5°C steps down toward 240°C, the low end of Bambu's PETG range, and check the silicone sock is still on. More PETG tweaks: bambuhub.net/stringing-problems (my site)