Jump to content
UltiMaker Community of 3D Printing Experts

Underextrusion in the upper right corner of the print

Recommended Posts

Posted · Underextrusion in the upper right corner of the print

It is a often seen problem underextrusion. However, in this case most of the print is OK, but ust in the right upper corner, starting about half way the build plate, it starts to underextrude. Especially with a second print session on this printer. I already have set the flow to 150% in the first layer only, but it kept on happening that this corner was bad.

What is the difference of this area with respect to the other area? 

I came up with a simple trick.


The bowden tube is following the printhead in any direction. The curve of the tube differs with the position of the print head. 

But about half way the build plate, the bowden tube does not free follow the print head, it is a little blocked by the enclosure of the printer. This causes the tube to make a more stretched curve with the result that the filament flow is reduced a little by the space the filament gets inside the tube. This will cause underextrusion when the bowden tube hits the enclosure and the print head is moving away to the close right corner. 


What you want to achieve is a solid and steady filament flow controlled by the stepper motor of the printer, regardless the position of the printhead! 

The bowden tube is curving anyway but you want to have it the same in any circumstance. The blocking enclosure moment can be avoided to have the bowden tube ALWAYS fixed against the enclosure up to the top of the enclosure. So the bowden tube dus not start bending just above the stepper motor, no, it starts to bend just at the top of the printer enclosure. 

You can have it fixed with some kind of clamp, tape or whatever. It solved my 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

      • UltiMaker Cura 5.3 stable released
        In this stable release, Cura 5.3 achieves yet another huge leap forward in 3D printing thanks to material interlocking! As well as introducing an expanded recommended print settings menu and lots of print quality improvements. Not to mention, a whole bunch of new printer profiles for non-UltiMaker printers!
          • Thanks
          • Like
        • 24 replies
      • 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
        • 18 replies
      • UltiMaker Cura 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
        • 22 replies
    • Create New...