Jump to content

Filament breaking during longer prints


Blizz

Recommended Posts

Posted · Filament breaking during longer prints

I've had my UM2 for about a week now and printed a lot of smaller objects (up to 4 hours print time) without (much) issues. However I'm trying to print a bigger object (24 hours) and it's happened twice already that when I get up, the printer head is just waving around in mid air because the filament broke.

The coil is not stuck as far as I can see, if I pull on the wire it doesn't seem to require more force than before.

It also doesn't seem to be a "grind" as the break was clean (the first time, I haven't had time to check this morning). But it did break exactly on the feeder sprocket twice. I am using the transparant PLA from Ultimaker for this print.

Any ideas/pointers? Also, how can I get the filament out from the bower tube, last time I've just pushed other filament behind until the broken piece was gone but it took half an hour or so.

 

  • Link to post
    Share on other sites

    Posted · Filament breaking during longer prints

    Also, how can I get the filament out from the bower tube, last time I've just pushed other filament behind until the broken piece was gone but it took half an hour or so.

     

    I've never had this problem but I would remove the bowden from the test head and push it out through the feeder. Be careful. On the print head there is a little clip - remove that clip. That clip holds up the "bowden holder". The bowden holder has 4 metal blades that dig into the bowden. Loosen the 4 thumb screws on the head so that the head is loose - maybe 2mm or enough so that the bowden is loose. Then push down on the bowden holder and pull up on the bowden. Be careful as the metal blades can scrape the bowden and it might not hold well next time. If you do damage the tube just cut off the bottom 1mm of the bowden and put it back in. Tighten the 4 screws last so the bowden is good and tight.

     

  • Link to post
    Share on other sites

    Posted · Filament breaking during longer prints

    as the break was clean

     

    Where do you see the break? Inside the bowden?

    Some people rewound their filament onto a tighter reel, or simply dried the filament too much by putting it in a box with desiccant for a week. And then later the filament shattered into hundreds of short pieces. Could it be your filament was too dry? Or too old?

    I'm guessing you have "bad" filament and should order some more.

     

  • Link to post
    Share on other sites

    Posted · Filament breaking during longer prints

    Where do you see the break? Inside the bowden?

    Some people rewound their filament onto a tighter reel, or simply dried the filament too much by putting it in a box with desiccant for a week. And then later the filament shattered into hundreds of short pieces. Could it be your filament was too dry? Or too old?

    I'm guessing you have "bad" filament and should order some more.

     

    Correct me if I'm wrong but I don't think filament can really be too dry. As far as I know the reason it shatters when re-wound on a spool while "moist" and then dried is because it shrinks slightly causing tremendous stress on the filament which eventually cracks it.

     

  • Link to post
    Share on other sites

    Posted · Filament breaking during longer prints

    The filament was from Ultimaker itself and I bought it with the printer. It did break in the feeder but I didn't have the impression it was ground down. I've printed the piece with silver PLA and that did work, which suggests there is a quality issue with the transparant filament I received.

     

  • 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

      • Introducing Universal Cura Projects in the UltiMaker Cura 5.7 beta
        Strap in for the first Cura release of 2024! This 5.7 beta release brings new material profiles as well as cloud printing for Method series printers, and introduces a powerful new way of sharing print settings using printer-agnostic project files! Also, if you want to download the cute dinosaur card holder featured below, it was specially designed for this release and can be found on Thingiverse! 
          • Like
        • 10 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...