Never had a print cover my nozzle to this extent. Is there any way to properly clean this? Material is petg
Heat the nozzle up and use a brass brush to scrub it off.
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I would heat it up to 300*C and see how well i could clean it.
Definitely use protection for your hands. Safety first.
But imo its best that you get a new one and maybe clean this one and keep it as a spare just in case
Wow-how did that happen?
But yes, heat it up to 300 degrees, then using 2 pairs of pliers, open it and use a scraper or other scrubbing object (steel wool pads at the expense of some scratches maybe) to scrub it off. Be careful of bubbling and always scrape it into a plastic bag or non combustible collection point
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I think that this page could help you : Hotend Clumping/Blob Cleaning Instructions | Bambu Lab Wiki
the answers are always broadly the same, whatever the methods used: heating to soften the plastic and brushing to remove it. Be careful to protect yourself from the heat of the nozzle
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I agree, it doesnt go more indepth than that!
Mark that comment as the solution!
I’ve had it happen a few times too, where it just essentially fills up the rubber boot and shuts off, then hardens to a very frustrating block.
Got to that point as well with a PETG print that went off without being detected. Heat + towel was fine for the head, and a part of the nozzle, then as previously said, brass brush + knife did the rest. The silicon boot couldn’t be saved…
Some rest kept coming back for some prints, I used the paper towel trick and brass brush again until gone. Hope that helps!
One symptom was it was difficult to swap for a different hotend.
Is this a nearly new machine? If so, please read.
Been there myself although my “blob” was significantly larger. I wound up replacing the hot end with the “upgraded” hardened nozzle as well as adding the “hardened” extruder gears option.
The replacements quickly failed. The problem was that the ENTIRE MACHINE was FILLED with loose assembly screws!
I got a replacement reasonably quickly as this machine was actually purchased with an extended warranty against my initial reservation.
The replacement machine was itself FILLED with loose assembly screws EVERYWHERE!!!
Trust me. Get a 1.5mm and 2mm version of precision straight (not cheap and sloppy “ball end” as supplied with the printer) hex wrenches with a swivel top to allow exceptional control as well as holding the screws perfectly at ANY angle prior to assembly without requiring the finger gymnastics to pull the head of the tiny screw up above the ill fitting “ball” end!