Jump to content
Ultimaker Community of 3D Printing Experts

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

      • New here? Get ahead with a free onboarding course
        Often getting started is the most difficult part of any process. A good start sets you up for success and saves you time and energy that could be spent elsewhere. That is why we have a onboarding course ready for
        Ultimaker S5 Pro Bundle, Ultimaker S5, Ultimaker S3 Ultimaker 2+ Connect.   
        They're ready for you on the Ultimaker Academy platform. All you need to do to gain access is to register your product to gain free access. 
        Ready? Register your product here in just 60 seconds.
          • Like
        • 13 replies
    • Create New...