Jump to content
UltiMaker Community of 3D Printing Experts

Adjustment for Tessellation

Recommended Posts

Posted · Adjustment for Tessellation

Hey Community

I have a Ultimaker 2 and I am really happy about the print quality.

But I have a other concerns about the tessellation.

I create my models in Catia V6 and before I can export the model into the STL format, of course I have to tessellate it.

In Catia V6 I can adjust two Parameters the "Sag" and the "Step" in mm.

I know there is a relationship with the tessellation and the print quality. You get better print results if you adjust little triangles as possible.

But I wonder if there is a limit of accuracy because of the Ultimaker 2 and where is it?

And what are the best or optimal adjustment for these parameters?

Thank you very much for your support.




  • Link to post
    Share on other sites

    Posted · Adjustment for Tessellation

    Try to keep quantity of triangles < 1 million. You will know if you have too many triangles because Cura won't be able to slice it - it will run out of memory (Cura only can use 2GB memory even if you have much more). Thinner slices will use more memory so .1mm slicing uses much more memory than .2mm slicing.

    I don't know what good values are for sag and step. You don't want too many steps per mm because Marlin has to be always ready to stop printing and it only looks ahead up to about 20 line segments so it doesn't know if there is a sharp corner coming up so it has to always be ready to stop within 20 line segments. If 20 line segments is only 3mm then it will print slow.

    I'm going to guess "sag" is distance from curve to line and I would say .1mm seems fine. And step I would say maybe .5mm would be fine. But I'm not sure exactly what these mean in Catia.


  • 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

      • 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...