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Print core gets clogged with PLA & ABS

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Posted · Print core gets clogged with PLA & ABS

Hello all,

Need your assistance with some problems I am having with Ultimaker 3 printer.

For a while now I am having problems printing with PLA black with my ultimaker 3 printer, each time I start a new job the print core gets clogged at the very beginning.

Because of that i tried to use ABS black, if I print a short job (2-3 hours) it comes out ok but if I print a long job like the one with the attached pictures the print core gets clogged also with the ABS.

Does anyone know what is the reason with these issues with both materials? attached are also the Cura parameters for both materials.

All materials are original and being recognized by nfc chip plus i did hot and cold pulls to the problematic print core.



abs 1 of 2.JPG

abs 2 of 2.JPG

pla 1 of 2.JPG

pla 2 of 2.JPG



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Posted · Print core gets clogged with PLA & ABS

Why does your screenshot shows "not supported" in the profile? Do you use strange layer heights or line widths? Do you use the AA print core?


Another reason could be that your middle fan is not working. Check that, the fan starts automatically as soon as the print core is over 40° and should run all the time. This fan is responsible to cool your hot end in the upper part.


Other reasons could be, tangled filament, feeder issues, or something like that. 


But I would first check the middle fan.

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