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PLA stops extruding, sometimes after a few layers, sometimes after the prime blob


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Posted · PLA stops extruding, sometimes after a few layers, sometimes after the prime blob

Hi there!


I am new to this forum and also quite new to printing - until so far, quite exciting! We just got a UMS3 at our work and we have only been printing with PLA and PVA. Mostly it has been going fine, but lately, the PLA sometimes just seems to give up. It happened already a few times that it starts printing, but then after a few layers, somehow it just seems to stop. And then the Bowden Tube also comes out in the back (see img. 1 and 2). I have then also tried to clean the nozzle with the hot-cold pull, and to clean the feeder. Sometimes it works then again, but sometimes not. Today, after this failed print in img 1 and 2, I even swapped the PLA roll, and then it started printing like img 3... The filament seems to be OK in the beginning, because it comes out clean while loading the filament, and the prime blob comes out ok. Does anyone have any suggestions what I could do and what is going wrong??






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