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Feeder eating/destroying filament


flashp0int

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Posted · Feeder eating/destroying filament

This is very common on the UM Original but rare on the UM2 which lowered the current so the extruder stepper skips (hopefully) before grinding filament. But if you have a UM2 you might need a spring adjustment (usually you want it looser). If UM Original you might want to tighten the spring on the feeder.

For either machine you might want to raise the temperature, make layers thinner, or slow down the print speed (only one of these is necessary - not all 3).

Which machine do you have?

 

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    Posted · Feeder eating/destroying filament

    This is an UM2, the spring seems very hard indeed.

    Because of this, I cannot plan any prints longer than a couple of hours.

    I either get the the extruder grind the filament, or because of skipped steps, the head does not have enough material.

    Any recommendations (spring type ?) on this would be most welcome, it is getting painful :(

     

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    Posted · Feeder eating/destroying filament

    Thanks Woofsplace and Dieselpower,

    The topic you mentioned seems really spot on, looks like I need to do a feeder print and buy a few scews :)

     

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    Posted · Feeder eating/destroying filament

    Take your extrude apart and have a look at the spring. Try rotating the spring so that it sits flattest against the arm. I found during the many times I've taken mine apart that it is possible to place the spring so that just an edge is on the arm and this increases the pressure to the point where it chews up filament quickly.

    There are also alternative extruders you can try. Have a look in the thread I linked to above.

     

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    Posted · Feeder eating/destroying filament

    OK, I upgraded to iRoberti 's design

    filament_issue_03.jpg

    Since, I printed for 5-6 hours with no issues. Filament loading seems to be tough on the filament when hiting the nozzle in the head. So loading has to be done with extra caution.

    But so far, much better ! Thanks iRoberti !

     

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    Posted · Feeder eating/destroying filament

    Thanks for reporting back :) The thing about loading filament; about 80% of the reason I designed it this way was actually to bypass the automatic filament loading completely... :) Just open the arm and yank the filament out, stuff new filament in and close the arm again, done.

     

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    Posted · Feeder eating/destroying filament

    Thanks for reporting back :) The thing about loading filament; about 80% of the reason I designed it this way was actually to bypass the automatic filament loading completely... :) Just open the arm and yank the filament out, stuff new filament in and close the arm again, done.

     

    Just to be sure... in both cases, the head has to be hot enough?

     

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    Posted · Feeder eating/destroying filament

    Yes

     

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    Posted · Feeder eating/destroying filament

    I get this all the time, it really sucks. Its the only bad thing about the ultimaker printer. If they solve this, then it would be perfect. My prints go for 40 hours plus so you can see how it might annoy me. Lol. And the phantom nozzle jams. Ok one minute and jammed the next, then extruder is grinding so much you have to rip it out. I just force it in now with pliers, and twist on move material till it gets past that point. Ill see if its jammed in the head (as it sticks out a touch due to the grinding) in the morning, as today it took me 2 hrs to get it going, well annoyed. Shame as i think the filament might run out on me and the model would have been awesome, o well, fingers crossed. I wish there was a little mark on the filament to let you know how much was left as unrolling and rolling it back is a no go.

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    Posted · Feeder eating/destroying filament

    For the fillament , just use a digital kitchen scale to weigh how much you have left, for this to work you need to know the weight of an empty spool, for each type/brands you use;

    My results;

    Ultimaker, black spool, 245 gram (although I believe UM has had different types / suppliers)

    Colorfab, transparant spool, 254 gram

    Makerpoint, black spool, 259 gram.

    For the grinding, are you using the factory feeder? if so print yourself a better feeder first thing!

     

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