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Problem when changing filament

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Hi all,

I got some problems when i change my filaments, mostly the standard blue from ultimaker. The feeder always tries to remove the filament and get stucked and just grinding the filament and destroying it!! The first time i said ok, second time...happens, but always its not ok. What can i do against that?



I have already 3-4 pieces like this.



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It doesn't look like the nozzle is getting up to temperature and allowing the filament to retract from the head. Have you tried to print a small item and then change the filament the second it finishes before the nozzel has had a chance to cool down?

I would advise changing your feeder to the lRobertl Alternate UM2 Feeder, download and print from the YouMagine site, makes it so much easier to change filament and controll the pressure on the feeder.

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Sorry, i recorded the video when the material was already cut off, that was the second try. The filament is coming 10-15 cm out and then it happens.

I saw lot of times that roberts feeder but didn't though why should i change the stock one. I will see, maybe i should really try it. :) thanks


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