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My Prusa MK4S has committed suicide  

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Rasmus Pugholm
(@rasmus-pugholm)
Member
My Prusa MK4S has committed suicide

I've had a few small problems with my Prusa but nothing compared to the huge problem I have now.

After starting a print job making 6 laptop holders, here is what happed (look at photos). The 3D printer is less than a year old. What can I do? Should I use a hair dryer, a saw or a drill? Or should I simply contact Prusa? Help 😮 

Posted : 28/02/2025 10:14 am
Neophyl
(@neophyl)
Illustrious Member
RE: My Prusa MK4S has committed suicide

Search for blob of doom.  Someones bed adhesion wasnt on point and the print let you, giving you the result you have.

Posted : 28/02/2025 10:59 am
Diem
 Diem
(@diem)
Illustrious Member
RE: My Prusa MK4S has committed suicide

You have a first class blob of doom. Search for blob of doom to see how others have dealt with them.

Before doing anything, look at pictures of a clean extruder and note the position of the rather delicate wires that are currently hidden, if you damage them you will have to buy replacement parts as broken wires can't be rejoined.

You have probably damaged your fan shroud and will need a replacement.

Raise the nozzle temperature to the printing temperature for the filament in question and allow it to heat for several minutes.

If you are lucky you will be able to prise the blob open - more likely you will need to add heat from outside with a heat gun to aid the softening, sometimes it's worth using a soldering iron to carve chunks off the mass.

Use needle nosed pliers to prise this away; remove it in parts if it won't release the wires.

Once you have the worst removed you decide whether you need to disassemble the extruder to get at all the blob or perhaps you can clean up in situ.

After the cleanup there will be overcooked filament inside the nozzle so at least a purge and probably a cold-pull will be necessary.

Cheerio,

Posted : 28/02/2025 1:40 pm
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