Jump to content
Ultimaker Community of 3D Printing Experts
THX1138

Importing STL with multiple objects, only one object appears in Cura

Recommended Posts

Strange behavior indeed.

S3D only imports one of the models as well. However, if I convert it to ASCII Format STL, S3D imports both of them.

Cura will only import one model regardess of STL format....

However, exporting it as OBJ allows importing of both models in Cura and S3D. So as a quick work-aound, see if you can export your models as OBJ and import them into Cura.

Sounds like an STL format compatibility issue somewhere.

Share this post


Link to post
Share on other sites

OK, the problem is that there is more than one 'solid' defined in the .stl file.

I didn't initially think this was a problem because .stl files can contain more than one manifold object. But apparently, Cura, S3D, and Slic3r cannot handle having solid appearing more than once in an .STL file - they will only read the first occurrence and ignore the others.

I don't know enough about the STL format to say whether multiple solid defines are syntactically allowed in that format or not.

But, to fix this (other than exporting as an OBJ file), would be to 'combine' your objects into a single entity in your editor (123D). I don't know how to do that in 123D, but in Meshmixer, you would select both objects and then click on Edit / Combine. Then when you export them as .STL, there will be only 1 'solid' declaration in the file, but 2 manifolds (one for each part).

Hope this helps.

Edited by Guest
  • Like 1

Share this post


Link to post
Share on other sites

I was pointed to this thread from another and I can attest that binary .STL can have more than one solid in it. Say three Tori not connected instead of just one by itself.

The other thread had a problem like this and it seemed to be an .STL compatibility issue and the file was ASCII.

Unless I misread the above. This is the link to the file I fixed. It is what I think is going on 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

    • "Back To The Future" using Generative Design & Investment Casting
      Designing for light-weight parts is becoming more important, and I’m a firm believer in the need to produce lighter weight, less over-engineered parts for the future. This is for sustainability reasons because we need to be using less raw materials and, in things like transportation, it impacts the energy usage of the product during it’s service life.
        • Like
      • 12 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!