Jump to content

Weird TPU95A tearing problem (Ultimaker S5)


Recommended Posts

Posted · Weird TPU95A tearing problem (Ultimaker S5)



As can be seen in the photo, I'm experiencing a weird problem when printing Ultimaker-brand TPU95A with my S5 (using Cura). The print just tears off when I attempt to remove it from the glass plate - and it's not because the adhesive is too strong. There is a strange stippling to the third or fourth layer of the print, as if there are tiny holes in it, and it is weak BEFORE I remove it. The rest of the structure is perfect!


This is driving me up the wall. I have never experienced this before. Has anyone any idea what's going on?




  • Link to post
    Share on other sites

    Posted (edited) · Weird TPU95A tearing problem (Ultimaker S5)

    This look very strange, seems to happened just after first or second layer(?).


    I've put a little more brightness and zoomed in some here:

    Put in some lines to mark some issues.

    The line at the bottom shows "much under extrusion", the tree lines above; -is this something to be there "in this object"?





    I'll think you need to tell us a little more how this happened(?).

    Did it occur after some change to the printer, -or in the Cura slicer, -or profiles?

    Do you use the same core for more than one type of filaments (PLA , TPU95A etc.)?

    Did this happen with other kind of print object (known good from before)?


    Edit: Just come to think about if this could be an issue because of some high nozzle pressure during first layers (with soft filament), this condition might lead to grinding some and low flow when pressure decrease. Actually, this might be easy to see if you study this printing in the beginning by monitoring the feed.. 

    Hmm.. Just a shot..







    Edited by Torgeir
    More info.
  • Link to post
    Share on other sites

    Posted (edited) · Weird TPU95A tearing problem (Ultimaker S5)

    Hi Torgeir,


    Originally, I started to experience under-extrusion problems when printing TPU. I tried various things to solve the problem, including: using both feeders for TPU, cleaning out the feeders, adjusting the tension of the feeders, switching the flow sensor on/off. The S5 now does at least complete the print (without the 'One material appears to be empty' error) with the flow sensor on, but I can't get rid of this problem.


    Attached is another image showing what a print looks like before I remove it from the glass. You can see that there is over-extrusion of the first(?) layer, and then layers 2 and 3(?) have the stippled appearance with holes. What do you think?




    Edited by covers911
  • Link to post
    Share on other sites

    Posted · Weird TPU95A tearing problem (Ultimaker S5)

    Well, soft filament is really a demanding task for bowden tube printers.

    The art is to print with as lo resistance as possible needed for proper feeding of this kind of filaments..

    Ultimaker advice to dry TPU95A before printing, -did you perform this recommendation?

    The TPU 95A profiles are "optimised to print on a cold build plate on the Ultimaker S5", so in order to validate this you'll need to deselect core 2, -if not the heat bed will go to default 70 deg. C.


    Use glue, then reduce first layer width to 100% (default is 120%). Reducing nozzle pressure during first layer printing.

    Do not use high printing speed, around 30 mm/sec. You may test a little to find the best speed.

    Retraction, here use a little as possible..


    Well, this is my 5p.

    Good luck




  • Link to post
    Share on other sites

    Posted · Weird TPU95A tearing problem (Ultimaker S5)

    I still cannot solve this. I used to have no problem with TPU, and now it ruins every print. For the life of me, I don't understand what suddenly changed. This problem did not gradually develop. It was sudden.


    I've tried everything I can think of, including calibrating the leveling, trying a different reel of TPU, taking the feeder apart, adjusting the width of the first layer... nothing works.


    What's the next stage? Should I buy a new feeder mechanism perhaps?

  • Link to post
    Share on other sites

    Posted · Weird TPU95A tearing problem (Ultimaker S5)

    Sorry to hear this.


    This is strange, -so do you print other filaments using the same print core?

    A clean print core is important for printing with this "soft" filament..

    Also for all the "exotic" special filaments I have found that, it is advantageous to use a nozzle or print core only for that type of filament.  Soft filaments and high temp filament's require some "special attention" - for the nozzle/print core you're using -and is often in the "experimental" class of 3D printing.


    So, if you're printing different material it's important to make sure that the nozzle/print core is clean.


    The most important thing when printing "filaments" known to be humidity sensitive is to STORE the filaments properly.

    Most of the high sensitive filaments will be contaminated on the outermost part of the beginning of the roll, so unwinding this part "say one meter" and cut it off.


    The cleaning procedure is here: https://support.ultimaker.com/hc/en-us/articles/360011652559-Print-core-cleaning-maintenance-schedule


    IMO., the above is the most common problem we'll see in our FDM 3D printing.


    Hope this help you somehow.





  • Link to post
    Share on other sites

    Posted · Weird TPU95A tearing problem (Ultimaker S5)

    Hi Torgeir,


    I'm quite convinced that something must be wrong with the Z axis mechanism (i.e. the leadscrew). Perhaps a great deal of force was used to pull a print off the plate.

  • Link to post
    Share on other sites

    Posted · Weird TPU95A tearing problem (Ultimaker S5)

    Is not this happen only when you're printing TPU95A?

    A problem with Z axe will be visible with "any" type of filament..




  • 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

      • 🎄✨ Thingiverse Tree Ornament Challenge! ✨🎄
        We've been running a Tree Ornament Challenge with a chance to win an UltiMaker S3 or colorFabb filament.
        Design a 3D printable tree ornament and join our festive challenge on Thingiverse. 🎁✨

        📆 Submission Deadline: December 22
        🏷️Tag your designs with Holidays2023

        Click here to join and check out the over 300 other amazing designs

        How to Enter
        Design an Ornament
        Create a 3D printable tree ornament that captures the magic of the winter season. Think snowflakes, sleighs, reindeer, cozy mittens, or anything that embodies the joy of the holidays. Upload to Thingiverse
        Share your masterpiece on Thingiverse and add the tag Holidays2023. Don't forget to include a captivating description and images that showcase your design from different angles. Submit by December 22
        All entries must be submitted by December 22nd to be eligible for consideration.
          Entering a new design
        Entering an existing design
        Winning designs should:
        Be original Creations
        Your designs should be original works, avoiding the use of others' intellectual property without permission. Include STL Files
        Each submission must include at least one STL file for 3D printing. Showcase a Completed Print
        Provide at least one photograph featuring a completed print of your design. Include Documentation
        Share the creative journey! Include documentation of your design process, giving us a peek behind the scenes. For example, show a screenshot of the model in your design program. Use the Tag Holidays2023.
        Use this tag to ensure your entry is counted in the Tree Ornament Challenge. Be submitted after October 1st, 2023
        Ensure your design was uploaded to Thingiverse after October 1st, 2023. Adhere to Submission Guidelines and Terms of Service
        Make sure your submission aligns with our guidelines and Thingiverse's Terms of Service.  
        Good luck 🎉
        • 1 reply
      • 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.
        • 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
        • 11 replies
    • Create New...