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UM2+ Extruder keeps jamming up


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Posted · UM2+ Extruder keeps jamming up

I'm a bit stumped on this and I think I have a solution...but thought I would ask my friends here for their thoughts.

 

I had a print display extrusion issues and then fail, air printing for a while before I noticed it.  The back of the machine under the extruder was full of chewed up filament.

 

I have the extruder tensioner set to the middle, which I think....I could be wrong...has always been the default position.

 

I was using a spool of Ultimaker black PLA that had been sitting out for a year.  I don't think PLA is susceptible to absorbing moisture as much as other filaments....but it's worth mentioning as we debug this!

 

I cleaned out the extruder by removing it and cleaning it, using the steps documented here and those provided by Fabrc8.

 

I put everything back together, re-attached to the Ultimaker 2+ and as a precaution, did 3 Atomic pulls to clean out the nozzle/make sure no issues existed there.

 

I opened a new package of Ultimaker Black PLA...everything was sealed and new!

 

Started a new print and a while into the print, the same thing happened.

 

Now I suspect I have a simple case of too much tension on the filament, causing the grinding.  What position should it be at by default (if such a thing exists)?

 

Back to cleaning this fella out again!

 

No automatic alt text available. 

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    Posted · UM2+ Extruder keeps jamming up
    3 hours ago, LePaul said:

    Now I suspect I have a simple case of too much tension on the filament, causing the grinding.  What position should it be at by default (if such a thing exists)?

     

    Since you mentioned the guide from fbrc8.com:

    The pictures there are very good - the important steps to get the tension right are:

     

    Quote

    Next, set your white plastic tension indicator and screw in the spring, and place it in the feeder housing between the housing and the lever.

     

    7_Indicator.JPG

     

    on your picture the screw-head is outside of the case - which is wrong and can cause grinding...?.

     

     

    Quote

    Turn the tension indicator screw at the top of the feeder housing until the feeder tension indicator is in the middle position.

     

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    Posted · UM2+ Extruder keeps jamming up

    Hi

     

    Im aware of that, it popped out after I opened up the housing.  I wish that was the root cause since I did put it back upon reassembly.  Now if the level indication goes up, that’s less tension?  For some reason I’m having trouble with Ultimaker filament.  The previous types I had in there printed  very well. 

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