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Nozzle disappearing up its own a***...perture - solved

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Sorry for the bad joke. This questions concerns an UM2.

I've had to use the "atomic method" quite a few times recently. As a result of pulling the filament back when the temperature drops to 90°, the nozzle has almost completely disappeared inside the head (see pictures).

What's the best way to bring it back down again without breaking anything?



Problem Nozzle

Problem Nozzle 2


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Strange. Well that nut with the holes in it rotates - you may want to heat to 180C before rotating - you might even have to disassemble enough to get the spring out to lessen the pressure. Rotating that nut (which is not as strong as steel so take it easy!) raises and lowers the nozzle tip so that if we ever go dual extruder you can set them to the exact same height.


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