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Disassemble Printcore?


yzorg
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Posted · Disassemble Printcore?

Has anyone ever disassembled a printcore?

couldnt find any pictures on how to best do that..

 

i have filament stuck in one 0.4mm AA Printcore. as those cores are quite expensive i want to try and fix it.

 

Filament is stuck up to the top but i cant grab it with pliers anymore. the first hot pull snapped it just there.

i tried another hotter pull.. to no effect. i hooked the end of the filament with a bent needle and tried to pull but it stayed jammed very hard.

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    Posted · Disassemble Printcore?

    There have been posts in this forum how to do it, but it is very risky: you can easily break things. Maybe you can find these posts? I have never done it myself.

     

    There is also a section on hot pulls and cold pulls, somewhere on the site, but i guess you already tried these? Sometimes warming the nozzle up and manually pushing the filament through is possible, if not totally blocked. Or sometimes you can get in from below with a thin needle to remove blockings, like a grain of sand. But I don't have much experience with blocked nozzles, I never had one. Just once a partial blockage (=reduced flow) by a piece of debris: I could push this upwards with a needle, then extrude some fresh filament, and then do enough atomic pulls to get all dirt out.

     

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    Posted (edited) · Disassemble Printcore?
    1 hour ago, DirgDiggler said:

    Here is a post. Its in german but it has a few pictures and a YouTube Video inside.

     

    Edit:https://community.ultimaker.com/topic/33097-anbieter-ersatzd%C3%BCsen-ultimaker-s3/#comment-268825

    danke. das hab ich gesucht...
    nach langem suchen hab ichs nun selbst versucht, da die düse eh nicht zu retten war.

    durch starkes erhitzen konnte ich die teile von der verstopfung befreien..
    leider hat das wie erwartet den versteckten teflonmantel im innern ebenfals zerstört.

     

    tja.  immerhin nun habe ich einige ersatzteile und weiss wie ich die nächste düse reparieren kann.

     

    edit:
    lustig. mein hotend ist ein kleines bisschen anders gebaut.  bei mir verläuft das PTFE rohr direkt im aluminiumkühlkörper, das stahlteil ist bei mir viel kürzer als das vom Video.

    Edited by yzorg
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    Posted · Disassemble Printcore?

    Here is a video showing it happening and also what to be careful of so you don't break the delicate heat break:

     

     

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