Freeforming Error: Conversion error for Body1 - T-Spline Topology Problem. Use Modify-Utilities-Repair Body to remove Error

Freeforming Error: Conversion error for Body1 - T-Spline Topology Problem. Use Modify-Utilities-Repair Body to remove Error

aniket.mangalampalli
Participant Participant
645 Views
4 Replies
Message 1 of 5

Freeforming Error: Conversion error for Body1 - T-Spline Topology Problem. Use Modify-Utilities-Repair Body to remove Error

aniket.mangalampalli
Participant
Participant

Hello, 

For some reason I get this error and so I went to repair body and fixed the errors, but still, it says that there is a T-Spline Topology Problem. I even did the autorepair body thing too, it still didn't work. Here is the file:  (It is supposed to be a garbage can but it isn't finished yet.) 

0 Likes
Accepted solutions (1)
646 Views
4 Replies
Replies (4)
Message 2 of 5

jeff_strater
Community Manager
Community Manager
Accepted solution

your immediate problem is the "lip" here:

Screen Shot 2021-07-20 at 11.21.32 AM.png

 

This is just a single face hanging out in space - not legal here.  However, deleting that shows some self-intersection errors that you will then have to deal with.  They are clearly highlighted.  Use Box Mode to help with those:

 


Jeff Strater
Engineering Director
0 Likes
Message 3 of 5

TrippyLighting
Consultant
Consultant

I repeat the usual T-Spline modeling guidelines:

 

1. Model 80%+ in box view mode (looks like you've done that).

2, Only add detail when you are 100% satisfied with the overall shape and proportion. The more geometry/polygons you add to the control cage the more difficult changes to the overall geometry will become.

3.Here's what's killing your model: You have numerous N-gons (polygons with more than 4 edges) in your model.

Model in quad faces only. 5-sided N-gons are OK but still, they are better avoided. NEVER use a triangle in a T-Spline design.

4. Model symmetric parts centered about the origin. That is valid for all 3D modeling!

 

This is the canvas image after you are modeling the garbage can after.

TrippyLighting_0-1626811146657.png

 

In Fusion 360 I would not model this with T-Splines. Not that it can't be done, but it is easier to do with the solid modeling, or surface tools.

 


EESignature

Message 4 of 5

aniket.mangalampalli
Participant
Participant

Thanks a lot for the advice, sorry, I am still pretty new to Fusion 360 freeforming and Fusion 360 in general. I tried to use freeforming to build the trashcan because I wanted to improve my skills with it. In the future, I'll try to follow the freeforming rules.

0 Likes
Message 5 of 5

aniket.mangalampalli
Participant
Participant

Thanks a lot for the solution, it helped me a lot!

0 Likes