Jump to content

UM+ feeder scratches filament


derbroti

Recommended Posts

Posted · UM+ feeder scratches filament

Hi,

ok coming from the extrusion upgrade thread, here more details about my scratching problem:

scratch.thumb.png.31aa73799de33a15e3a8f61acc6e2afc.png

When looking into the feeder from the top hole (where the bowden tube goes in ;) ) I can see that the knurled wheel is in the path of the filament. This basically makes the hole D shaped like the left straight side that should be round is occupied by the wheel (I will make a picture later, the printer is currently running).

So, even when the tension wheel is fully out of the way my filament gets scratched by the wheel.

Maybe mine is slightly too large?!

I measured my filament and it is in spec (2.82-2.85 but never over that).

I noticed that before taking it apart - and the knurled wheel is completely fixed in its position so it can not have moved by accident.

Are there specs for the knurled wheel so I could measure it and compare? Or does mine have too sharp teeth?!

Any ideas?

Thanks!

scratch.thumb.png.31aa73799de33a15e3a8f61acc6e2afc.png

  • Link to post
    Share on other sites

    Posted · UM+ feeder scratches filament

    Your knurled wheel should create the motion, does also scratched your filament or is it the wheel that supplies the pressure that pushed the filament against the knurled wheel?

    Have you tried opening up your feeder?

    That 'pushing-wheel' should be secured between two arms. Could you check if that wheel can still rotate freely and if those arms are still correct?

    Perhaps by adding a picture of what the inside of your feeder looks like it could pinpoint us into a certain direction. Thanks!

  • Link to post
    Share on other sites

    Posted (edited) · UM+ feeder scratches filament

    Pictures? - I have a video! :D

    It is the knurled wheel - I removed the idler wheel + lever ;)

    So you can see, that I can move the knurled wheel by just moving the filament (which I tried to straighten as best as I could) - if i hold it tight, as it would be from the stepper I can scratch it - if you crank up the volume a bit you can hear it in the end.

    As my filament is normally curved, bowing to the right when it comes from the roll - it would press even harder onto the knurled wheel.

     

    (It is a public but unlisted video, I hope that works)

    So overall it is no deal breaker (for me) and as far as I see it not "solvable" in this iteration but I wanted to mention it.

    Edited by Guest
  • Link to post
    Share on other sites

    Create an account or sign in to comment

    You need to be a member in order to leave a comment

    Create an account

    Sign up for a new account in our community. It's easy!

    Register a new account

    Sign in

    Already have an account? Sign in here.

    Sign In Now
    • Our picks

      • UltiMaker Cura 5.7 stable released
        Cura 5.7 is here and it brings a handy new workflow improvement when using Thingiverse and Cura together, as well as additional capabilities for Method series printers, and a powerful way of sharing print settings using new printer-agnostic project files! Read on to find out about all of these improvements and more. 
         
          • Like
        • 7 replies
      • S-Line Firmware 8.3.0 was released Nov. 20th on the "Latest" firmware branch.
        (Sorry, was out of office when this released)

        This update is for...
        All UltiMaker S series  
        New features
         
        Temperature status. During print preparation, the temperatures of the print cores and build plate will be shown on the display. This gives a better indication of the progress and remaining wait time. Save log files in paused state. It is now possible to save the printer's log files to USB if the currently active print job is paused. Previously, the Dump logs to USB option was only enabled if the printer was in idle state. Confirm print removal via Digital Factory. If the printer is connected to the Digital Factory, it is now possible to confirm the removal of a previous print job via the Digital Factory interface. This is useful in situations where the build plate is clear, but the operator forgot to select Confirm removal on the printer’s display. Visit this page for more information about this feature.
          • Like
        • 0 replies
    ×
    ×
    • Create New...