Jump to content

Bowden tube popping up


Recommended Posts

Posted · Bowden tube popping up

I've just noticed that during my current print the Bowden tube has 'popped up' from the hot end leaving a gap of about half cm between it and the hot end. I can just see the filament going in unsupported. This happened earlier, so I aborted the print and re-pushed in the tube and made sure the collar was tight, up and the little insertion spacer was pushed in. Re-started the print and now it's happened agin, about 15 mins into the print.

It is actually still printing the bottom layers perfectly well, but as it's a 9 hour print I don't know what will happen later.

Has anyone come across this before and do you think the current print will go ok? I am not sure how essential it is for the Bowden tube to be firmly pushed into the bottom of the extruder part.

  • Link to post
    Share on other sites

    Posted · Bowden tube popping up

    It's absolutely vital for the bowden tube to be fully inserted to constrain the filament path, and prevent any deformation of the filament before it goes into the hot end - especially when the print starts doing retractions.

    The outside of the bowden has probably abraded away where the clip grabs it, so that it cannot properly grip any more; alternatively the clip itself may be damaged so it doesn't grip properly.

    I recommend removing the bowden tube from the hot end, and cutting off a few mm, so that the clip will be gripping fresh plastic again when it is reassembled. Follow http://umforum.ultimaker.com/index.php?/topic/4586-can-your-um2-printer-achieve-10mm3s-test-it-here/?p=40399 to re-insert and fix the Bowden. Before reassembling, look down into the clip, and make sure that it looks ok, and the metal bladed grippers just inside the black plastic block don't look damaged.


  • Link to post
    Share on other sites

    Posted · Bowden tube popping up

    Thanks, I re cut the Bowden tube and now it doesn't move when I pull on it fairly hard, so thanks for that! I'll test it when I've sorted my fan problem out.

  • Link to post
    Share on other sites

    Posted · Bowden tube popping up

    this might be obvious, but if ever you need to removed the bowden tube, pull the print head apart and pull the bowden tube all the way out forwards, not back against the grain of the little grippers in the collar, so they don't shave the tube down at all.


  • 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

      • 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
      • Ultimaker Cura 5.6 stable released
        Cura now supports Method series printers!
        A year after the merger of Ultimaker and MakerBotQQ, we have unlocked the ability for users of our Method series printers to slice files using UltiMaker Cura. As of this release, users can find profiles for our Method and Method XL printers, as well as material profiles for ABS-R, ABS-CF, and RapidRinse. Meaning it’s now possible to use either Cura or the existing cloud-slicing software CloudPrint when printing with these printers or materials
        • 48 replies
    • Create New...