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sharksharkshark

Ultimaker 2 under/not extruding suddenly

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So I've run into a problem with extruding on my Ultimaker 2.

I've performed multiple atomic pulls, the last two of which came out clean, and leveled the bed again as well. Nothing seems to help and the filament just seems to come out verrrry slow or not at all.

I recorded a crappy video that hopefully shows what I'm experiencing if anyone in here might have some insight:

 

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You might want to check the Teflon insulator look here for instructions

It also looks like the space between the Teflon insulator and the steel coupler is to big. It should be around 1mm. Maybe some PLA has entered between them causing a clog higher in the head?

Other things to check:

Filament diameter (must be 2.85mm (with tolerance) not over 3mm)

Rear fan (but it looks like it's working in the video)

Bowden tube friction (is it damaged?) is it well inserted in the Teflon?

Grinded filament, can add extra friction in the bowden

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