Jump to content
Ultimaker Community of 3D Printing Experts
pbechard

Mismatched Solid vs Layer views

Recommended Posts

Hi everyone, 

First time poster, but have been using Cura for about 8 months now.  Seeing a weird result tonight where the Solid view of a model conflicts with the layered view of the model, and the actual physical print.

 

I grabbed this print from Thingiverse:  https://www.thingiverse.com/thing:2893747

 

I loaded the "walls.stl" in Cura (attached to this post).  When I view the Solid View it shows the design as not having a roof (which also matches the original authors description of the design). The "ThingView" mode in Thingiverse also shows no roof.

 

When I switch the view to Cura's Layer View, it generates a roof.  The roof is substantial - enough that it creates 15-20 layers of infill !!   The physical print also included a roof.

 

Do you have any ideas about why the views would be so different?  I've never seen that before in Cura.

 

Cheers,

Peter

Cura_Solid_NoRoof.JPG

Cura_Layers_ShowsRoof.JPG

Cura_Layers_ShowsRoof_Infill.JPG

Walls.stl

Share this post


Link to post
Share on other sites

This is because the model was created with sketchup and they didn't create a proper model.  some of the parts in this (I think those corner diagonal things) have the triangles in the STL showing their normals backwards - the "normals" in the STL say which side of the triangle is solid and which side should be air.  So when cura slices it gets confused.

 

Always look at a part in slice view and if shows that it is printing somewhere it shouldn't - don't think it won't do that when you really try to print.  Slice view tells the truth.

 

So what's the solution?

 

You have a few options.  

1) You could easily fix the sketchup file - right click on the gray walls and select "reverse faces" to make them white.  the skp file (the sketchup file) is included so I'd go this route.  Because I've used sketchup a lot.

 

2) You could sent the STL through a cleanup program - this one is free but requires you to create an account:

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

3) There are some model repair options you could try in Cura.  "mesh fixes".  I thought there was normal fix but I don't see it.

 

 

  • Like 1

Share this post


Link to post
Share on other sites

Nice detailed answer, thank you.   I was going to attach my own roof from sheet styrene, so I'm not too worried about the fact it actually printed one for me (incredibly, it spanned that gap).   Was just perplexed about the way it was presenting.  I think I'll send this link to the original Thingiverse author so he can potentially correct it at the source.

 

I use Layer View all the time when evaluating a print - it reveals so many issues before actually printing the items.

 

Thanks again.

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

  • Question: How do you use your 3D printer?   172 members have voted

    1. 1. - For what purpose do you 3D print?


      • Professionally, I have access to a 3D printer at work
      • Professionally, I have a 3D printer at home that generates revenue, or assists me in my work
      • Hobby, I have a 3D printer just for fun

    Please sign in or register to vote in this poll. View topic
×

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!