Jump to content
UltiMaker Community of 3D Printing Experts

Print Head re-assembly


Recommended Posts

Posted (edited) · Print Head re-assembly

I had a bad print go all day and came home to find a large blob of nylon melted all around my AA print core, partially onto the BB.  So much to the extent that the fan hinged down pulling out one of the wires.  I have had a few successful prints, in the month I've owned my UM3+, however this is the second time this has happened.  First time was ABS (using original glue stick) with default ABS settings. 

This failed print (2nd time print core disaster) setting was default for Nylon (previous successful nylon prints I ran core temperature +15); I deduce is too cold since the lines apparently did not bond to one another, being a cold bond.

I have undergone removing the nylon with a heat gun, having the print core lock tabs getting heat distortion now as well as the inside of the off-white assembly head.  My brand new printer is not new anymore! 

1.  Does this occur often?  

2.  ***Most importantly, is there an assembly manual available to ensure I re-assemble the print head assembly correctly?***



Edited by Daniel_ouf
  • Link to post
    Share on other sites

    Posted · Print Head re-assembly

    DId the nylon print come unstuck from the bed or did the part just have bad layer adhesion and break apart? Ultimaker Nylon normally has a really strong layer adhesion on default profiles without any temp changes or enclosing the printer. I do use the front door though just to keep drafts out. The only time I have had bad layer adhesion is when the nylon has absorbed too much moisture and requires drying. You can hear small crackles and pops when it's printing and the print is very milky (if natural Nylon).

    You need to be very careful with the heat gun as some heat guns can heat up too hot and damage the printer parts. 

    I would contact your reseller as you may be able to get a replacement core for free if its a UM one and damaged due to the flooded head. It would be good for them to know for reporting frequencies of this problem occurring and if you require replacement parts they may be covered.

    Not sure of if there is a head assembly manual but there is a bit of a front door guide Here

  • Link to post
    Share on other sites

    Posted · Print Head re-assembly

    I am waiting on Matterhackers to see what their communication with Ultimaker results in.  The most upsetting part is the malfunction occurred using the default settings.   


    I still need assembly instructions and cannot find them anywhere.  If anyone knows please advise thanks!

  • Link to post
    Share on other sites

    Posted · Print Head re-assembly

    Thanks.  I found this, which answered my question regarding the (3) plastic parts, spring and metal sleeve.  It's in another language but I was able to see how it all goes back together!  If Matterhackers provides a manual for the complete re-assembly I will share it here.


  • 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

      • Here it is. The new UltiMaker S7
        The UltiMaker S7 is built on the success of the UltiMaker S5 and its design decisions were heavily based on feedback from customers.
        So what’s new?
        The obvious change is the S7’s height. It now includes an integrated Air Manager. This filters the exhaust air of every print and also improves build temperature stability. To further enclose the build chamber the S7 only has one magnetically latched door.
        The build stack has also been completely redesigned. A PEI-coated flexible steel build plate makes a big difference to productivity. Not only do you not need tools to pop a printed part off. But we also don’t recommend using or adhesion structures for UltiMaker materials (except PC, because...it’s PC). Along with that, 4 pins and 25 magnets make it easy to replace the flex plate perfectly – even with one hand.
        The re-engineered print head has an inductive sensor which reduces noise when probing the build plate. This effectively makes it much harder to not achieve a perfect first layer, improving overall print success. We also reversed the front fan direction (fewer plastic hairs, less maintenance), made the print core door magnets stronger, and add a sensor that helps avoid flooding.

        The UltiMaker S7 also includes quality of life improvements:
        Reliable bed tilt compensation (no more thumbscrews) 2.4 and 5 GHz Wi-Fi A 1080p camera (mounted higher for a better view) Compatibility with 280+ Marketplace materials Compatibility with S5 project files (no reslicing needed) And a whole lot more  
        Curious to see the S7 in action?
        We’re hosting a free tech demo on February 7.
        It will be live and you can ask any questions to our CTO, Miguel Calvo.
        Register here for the Webinar
          • Like
        • 10 replies
      • UltiMaker Cura 5.3.0-Alpha 🎄 Tree Support Spotlight 🎄
        Are you a fan of tree support, but dislike the removal process and the amount of filament it uses? Then we would like to invite you to try this special release of UltiMaker Cura. Brought to you by our special community contributor @thomasrahm
        We generated a special version of Cura 5.2 called 5.3.0 Alpha + Xmas. The only changes we introduced compared to UltiMaker Cura 5.2.1 are those which are needed for the new supports. So keep in mind, this is not a sneak peek for Cura 5.3 (there are some really cool new features coming up) but a spotlight release highlighting this new version of tree supports.  
          • Like
        • 17 replies
      • 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
        • 14 replies
    • Create New...