Got a problem wuth conversion T-spline -> solid body for make a .stl file

[Anonymous]

Hi guys, thank you for your attenction, I ve created a 3d model in sculpt mode but when i try to "finish form" it says i have to repair the T-spline. i repaired it tons of times but i can't hunderstand why it is unconvertible. fleeing around on the forum i red that maybe the problem is that all of my model is based on triangles and one hidden face that got 6 edges (i can't find it ****). i'm asking for your help, i'm new at fusion 360, before i was using blender. if needed i ll upload some screenshots.

[jeff_strater]

@Anonymous,

If you can share the design here, there will be lots of people who will help you debug the problem.  A lot of times, the error is caused by a self-intersecting surface from the TSpline body.  Looking at the body in Box mode (under the Utilities->Display Mode command) can often help.

Jeff

[Anonymous]

Thank you for the answer, i tried as u said but got no results, here there is the link (http://a360.co/2D88tKV)

[TrippyLighting]

I looked at your fine and it would occur to me that you likely also don;t know how to use Sub-D modeling techniques in Blender.

You can create perfectly fine .stl files in Blender and Blender's toolset toolset for 3D printing is far superior to the functionality available in Fusion 360.

However, I am assuming that you want to keep the very prismatic shape of the object in Fusion 360. As such, you should not convert it into a T-Spline but direct into a BRep or solid bod=y.

then you can create a .stl out of Fusion 360. However, unless you want to modify this shape with the solid modeling tools in Fusion 360 there is no reason to use Fusion 360 just to create a .stl.

[jeff_strater · Accepted solution]

@Anonymous,

I took a look at this model.  I will agree with @TrippyLighting that this is a bit of an unusual application of TSplines, since the result is very faceted, and what TSplines is best at is sub-d type smooth surfaces.  But, it should be OK.  I think I understand the problem, and the error message is accurate.  It is a topology problem.  This model has a lot of overlapping edges, with faces in-between them.  These faces are illegal, and are, I think, why the model won't convert to BRep.  The screencast below shows just a couple of these edges.  I tried, for a while, to clean them up, but there are so many of them, I had to give up, 

Jeff

[Anonymous]

Fine i think i have to restart it, thank u all

[TrippyLighting]

I removed the internal faces in Blender, exported as .obj and reimported it into Fusion 360.

In Fusion 360 I converted it into a BRep.

It did not convert into a T-Spline because of the hight percentage of triangles in the design.

Even if you do design this cleanly in the T-Spline environment in order to maintain the sharp edges you'll have to crease every edge and based on my experience the likelihood that it will not convert into a solid body is pretty high.

The best way to design these low poly designs in Fusion 360 only is a bit of a workaround but very effective. Simply design it in the T-Spline environment.

Then export the control cage as .obj.

Re-import the .obj mesh and convert into a BRep.