Jump to content
Ultimaker Community of 3D Printing Experts

Unwanted support material

Recommended Posts

Horizontal expansion is indeed the setting to fix it, but it doesn't explain why we do it. The issue that the horizontal expansion is trying to fix is that printing very thin PVA supports tends to fail; Either due to support being knocked over or PVA degrading in the nozzle (as not enough material is extruded). The only way to fix it is to ensure that enough material is extruded per layer. As we optimised for reliability, it resulted in too much PVA in quite a few cases.

Share this post

Link to post
Share on other sites

In normal view were there red areas there?  If so play with the support angle - sometimes that fixes it.  Cura definitely gets confused on what areas need support and what don't.  I'm not sure why but I think it has to do with the "surface normal" in STL files.  Many CAD packages don't set that value properly and this messes up the algorithm that tries to figure out where support is needed.  Possibly it might help to run the model through a mesh repairer like the free one at netfabb here:


Share this post

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

    • Architect Design Contest | People
      The goal of this contest is to design a set of people figurines that could be used in such a project to make an area, office or mall seem populated. 
      Think of different types of people in different environments, like walking people, people standing still, working people, and both men and women.
      • 31 replies
    • Taking Advantage of DfAM
      This is a statement that’s often made about AM/3DP. I'll focus on the way DfAM can take advantage of some of the unique capabilities that AM and 3DP have to offer. I personally think that the use of AM/3DP for light-weighting is one of it’s most exciting possibilities and one that could play a key part in the sustainability of design and manufacturing in the future.
        • Like
      • 3 replies

Important Information

Welcome to the Ultimaker Community of 3D printing experts. Visit the following links to read more about our Terms of Use or our Privacy Policy. Thank you!