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Underextrusion problem


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I've had my ender 3 for some time now and i didn't have any issues with printing but lately I've been getting a lot of underextrusion. I changed the nozzle, tinkered with the printing temperature and in the end figured out it was the extruder arm that was not tight enough that was causing the major problem, I put a spare bolt in there to tighten it and there was a lot more extrusion after that but any few seconds it doesn't extruder enough and i end up with holes. Is there some other solution that i could try?