Jump to content
Ultimaker Community of 3D Printing Experts

Help!! New to designing 3d models, and Cura isn't working


teenflon5
 Share

Recommended Posts

Posted · Help!! New to designing 3d models, and Cura isn't working

Hello,

I'm new to making 3d models in sketchup, and a little stuck.

I've made an object in sketch up by drawing shapes and push/pulling them to size, and then drawing further shapes on the existing model. I've used the Sketchup STL export ad on to export the file, but Cura really doesn't like it. Cura has lots of missing layers, and the X ray view shows lots of problems, but I just can't understand why it's not working given I drew the shapes on top of the existing shapes.

I've tried using meshlab to create the STL and that hasn't worked. I used MakePrintable to repair it and that just made things worse. There seems to be something fundamental I'm doing wrong, but have no idea what it is. Any ideas?!

5a333d74ced95_ScreenShot2017-07-28at12_35_25.thumb.png.4a391cc940074a093590ecf36b294cb5.png

5a333d750a0a9_ScreenShot2017-07-28at12_23_17.thumb.png.44842d02edcf8db2a091f8bdbb9994a8.png

5a333d7524ecc_ScreenShot2017-07-28at12_23_09.thumb.png.c5938c94bc33f42e2b0fd1c1a1bb45be.png

5a333d74ced95_ScreenShot2017-07-28at12_35_25.thumb.png.4a391cc940074a093590ecf36b294cb5.png

5a333d750a0a9_ScreenShot2017-07-28at12_23_17.thumb.png.44842d02edcf8db2a091f8bdbb9994a8.png

5a333d7524ecc_ScreenShot2017-07-28at12_23_09.thumb.png.c5938c94bc33f42e2b0fd1c1a1bb45be.png

  • Link to post
    Share on other sites

    Posted · Help!! New to designing 3d models, and Cura isn't working

    Keep cura xray open in one window and sketchup in a second window. Zoom in using the cura zoom controls (plus key on keypad) and drag (shift right click drag) to find the problem face. You have internal walls. If you build a cube with 6 sides. Then add a second cube to the first cube by adding 5 more walls (4 sides and an end) now you have this internal wall that is impossible to print. It is an infinitely thin wall *inside* the model.

    STL files don't have "insides" and "outsides". They just have a randomly ordered set of triangles and cura intersects these with a plane to get random line segments. Cura than tries to link these lines up into loops but has trouble with this internal wall which is now an extra line segment confusing cura.

    Here is a visual guide to how to clean up sketchup models:

    https://i.materialise.com/blog/3d-printing-with-sketchup/

  • Link to post
    Share on other sites

    Posted · Help!! New to designing 3d models, and Cura isn't working

    Unless you know what you are doing, sketchup produces stl files that are unsuitable for 3d printing. Use another application, such as TinkerCAD.

  • Link to post
    Share on other sites

    Posted · Help!! New to designing 3d models, and Cura isn't working

    Thanks :) I've fixed it now! I assumed that it would figure out boxes drawn on top of boxes, but maybe not. I went inside the model and deleted every internal face, and then deleted every line on the model that wasn't an edge line. It now shows up perfectly in Cura :)

  • Link to post
    Share on other sites

    Posted · Help!! New to designing 3d models, and Cura isn't working

    Thanks :)I've fixed it now! I assumed that it would figure out boxes drawn on top of boxes, but maybe not. I went inside the model and deleted every internal face, and then deleted every line on the model that wasn't an edge line. It now shows up perfectly in Cura :)

     

    Get the 'Solid Inspector' plugin from the Sketchup Warehouse. It's free and pretty good (not perfect) at checking your models for errors: reversed faces, Stray Edges, Surface Borders, Internal Faces, etc. Save's a lot of time.

    • Like 1
    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
     Share

    • Our picks

      • New here? Get ahead with a free onboarding course
        Hi,
         
        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
        • 8 replies
    ×
    ×
    • Create New...