Jump to content

Cura error message - Again


Recommended Posts

Posted · Cura error message - Again

I am newer than a newbie to 3D printing. I have asked this question before but still having a problem with Cura telling me my model(s) are not watertight. I have attempted to use what was previously told to me with no sucess.  Yes. I have normal windows in my models but what models don't. I tried downloading a model from the internet from a respected designer but got the same 'watertight' error. Any suggestions from anyone. PLEASE

  • Link to post
    Share on other sites

    Posted · Cura error message - Again

    Consider a basic calibration cube.  It has 12 edges where one face meets an adjacent face.  There should be no gaps in those edges.  If there was a gap then if you tried too fill the cube with water it would run out onto the floor.  The model isn't watertight  (also called non-manifold).


    When a slicer goes through the model it needs to know where the inside is and where the outside is.  That gap in a seam allows the slicer to move along the wall on the outside and keep going through the gap instead of onto the outside of the adjacent face.  Now the slicer is on the inside but doesn't know it.  That's when all the confusion jumps up and the slicing goes wrong.  That's why the warning comes up.


    Even a "Respected Designer" is at the mercy of the software utility that converts a CAD model into an STL/OBJ/3mf file for use in the slicer.  Designers themselves can put a model together incorrectly and cause problems during the export to STL.


    Cura has some basic STL repair functions (if the Mesh Tools plugin is loaded from the MarketPlace).  MS 3D Builder (in Windows) and Fusion 360 have decent repair tools as do some on-line sites (I've been using THIS ONE and it's pretty good.  I like the report it generates on what was wrong with the model.)


    A pretty fair percentage of the problems attributed to Cura both here and on the Ultimaker Github site are actually problems with the models.  Of those problem models only a tiny percentage cannot be repaired without going back and fixing them in the CAD software.  That FormWare site I mentioned fixed one model that had 36,000 errors.  In that particular case I think magic was involved.







  • 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 5.7 stable released
        Cura 5.7 is here and it brings a handy new workflow improvement when using Thingiverse and Cura together, as well as additional capabilities for Method series printers, and a powerful way of sharing print settings using new printer-agnostic project files! Read on to find out about all of these improvements and more. 
          • Like
        • 7 replies
      • 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
    • Create New...