How to fillet this polysurface on Rhino 5

francescatesei · June 20, 2020, 1:04pm

Dear Rhino enthusiast I hope you can help me with an issue that I am having with the enclosed model.

I would like to fillet the outer polysurface to the inner rim that I designed by doing loft from one surface edge to the other.
Ideally I would like to have a 0.3mm uniform fillet along the external rim of the object, unfortunately it doesn’t work with FilletEdge.

I am open to any suggestion that would give me a smooth edge.

Thank you

Sun69mm.3dm (4.9 MB)

martinsiegrist · June 20, 2020, 1:57pm

You’re trying to combine a mesh and polysurfaces, which can be tricky.

The fillet is possible but only with some extra effort. Here’s what I did:

scaled the sun just 2D by 1.025 to have a bit more planar space around the hole.
I modeled a BRep to subtract all the details of the hole. This BRep also has the fillets
Turned the BRep into a mesh
Subtracted the mesh from the sun

Sun69mm.3dm (2.1 MB)

francescatesei · June 23, 2020, 9:19am

Cheers Martin! I didn’t know it was possible to it this way. Very helpful!
The models need to be gold 3D printed, only last weekend I realised how expensive is the process and I need to reduce its volume to get decent quote.
It’s a great chance to try this method myself!

martinsiegrist · June 23, 2020, 6:54pm

Thanks Francesca. If the above is a solution, please check the box