Jump to content
Ultimaker Community of 3D Printing Experts
kbuckler

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:

https://service.netfabb.com/login.php
 

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

×

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!