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Ultimaker 2 feeder problem

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Hi, just got my ultimaker 2! I'm having a great time messing around with it. Every single print I have made have been really good so far! However, the only problem I have with it is the feeder. For some odd reason, the feeder keeps fraying the filament(at the most random time), causing the filament to not feed into the head. Because of this, I have to retract the filament and cut the frayed filament off so that it will feed probably. I am confused why this is happening and I was hoping I would get an answer here! My guess would be that the board is leveled too high, causing the filament to get stuck. BUT, that would be weird cause if that was true, why would it print half of it perfectly fine and then randomly get frayed? Let me know what you guys think!


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Does the piece that you are printing require a lot of retraction? Because a lot of retraction, perhaps combined with a slightly too high tension on the feeder spring, can cause the filament to be flattened out. If that happens it might get too wide to fit in the bowden tube, get stuck and them get ground by the knurled wheel.


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You can also reduce the torque requirement in a couple of ways: reduce the print speed and/or increase the temperature by 10C. See if that helps.

A warning too: if it's been grinding filament then the bits can get caught inside the feeder casing. There's a long discussion thread about design improvements for the feeder: I've switched to IRobertl's design: it's easier to maintain, easier to keep it clean of debris, and easier to tweak the tension on.


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