Jump to content

Extruder overflow


Recommended Posts

Posted · Extruder overflow

Hi all,

I have a problem with my Ultimaker, but I think it's best displayed in photos.

here's the extruder head before starting to print


here it is while it's printing


and here it is after it finished



as you can see, we start with (almost) clean extruder head with the heater, but while it's printing, the plastic is oozing from on top of the extruder head (from all around it).

and it seems as if there's too much and it's oozing too slow, so, it's overflowing from the top side of the heater.

note 1: this was a 30 minute job, the problem gets worse with time and eventually it drips some burnt plastic drops (brown instead of white) on the printed object

note 2: I some times (including in this print) take a small piece of paper and try to wipe the overflown plastic onto it and away from the head so it wouldn't drip.

my question is how do I prevent this ?

is it from extruder steps calibration ? or is it a hardware issue ?

using Cura 12.10_RC4 to build the gcode and Pronterface to print it

  • Link to post
    Share on other sites

    Posted · Extruder overflow

    The hotend is leaking, could be a gap between the nozzle and the brass part. Make sure the nozzle is screwed in tightly. As well as the brass being screwed in tightly. Your hotend needs to be hot to do this, as it will break otherwise.

    If this doesn't work you could put in some teflon plummer tape on the treads to seal it. Shouldn't be needed with your V2 hotend, but it sealed up V1 hotends quite good.

  • Link to post
    Share on other sites

    Posted · Extruder overflow

    hi Daid,

    thanks for the reply,

    especially thanks for the warning about doing it while the hotend was hot, I would have broken it otherwise.

    you were right, I tightened it from both sides (nozzle & brass), and it's working fine now.

    of course, I had to re-align the z-axis after I tightened the nozzle. (just mentioning it for anybody who would have the same problem)

  • 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
        • 10 replies
    • Create New...