>> yeah filleting really doesn't seem to like the shapes you happen to be making here. I think it's a combination of bending plus that twisting effect I was talking about earlier.

Yes but that applies to the green model too but on it everything works better. I am just wondering what is special of the green curves that I used to loft the green model :-) If we figure that out won't that help?


Regarding your uploaded file, if I select the entire model I can apply a fillet of as high as 8...17 units on it. If I select any of the curves on their own, fillet completely fails (8 or 17). Plus the surface quality of the fillet in the corner seems not nice in reflections.
Ok no problem. Thanks for helping though.

Hi Curious,

re:
> I am just wondering what is special of the green curves that I used to loft the green model :-)

Nothing really jumps out at me, it would take quite a lot of analysis effort to try and find out the answer.


> Regarding your uploaded file, if I select the entire model I can apply a fillet of as high as 8...17 units
> on it. If I select any of the curves on their own, fillet completely fails (8 or 17).

Selecting only some of the edges that come off of a common point instead of all makes the filleting process a little different - it can't build a corner patch and instead has to intersect the fillets with each other and that can be difficult when they are different sizes where they meet up. In that case there the intersection is failing but the fillet pieces are still generated so that you have something to work with and can put them in place using trimming.

If you did want to only fillet some of those edges for the horizontal ones it would be good to do it at this stage before trimming the pieces against each other:



> Plus the surface quality of the fillet in the corner seems not nice in reflections.

Yeah it looks like the corner juncture patch is a little bunched up. Probably a different CAD program with more sophisticated fillets would do ok on that one.

- Michael

Vertical Lofting with rebuild curves with same number of control points can't not make the trick ?
(in this particular symmetric piece)

Hi Pilou,

re:
> Vertical Lofting with rebuild curves with same number of control points can't not make the trick ?
> (in this particular symmetric piece)

When curves are of different lengths and also changing in shape the difficult thing can be about how the surface is formed by the connection between the curves. Just connecting the same percent distance along one curve to the same percent on the other sometimes isn't good. There can be too much slanting.

When that's the case it can be good to build separate surfaces for the different shapes rather than trying to squeeze it into one single surface.

- Michael

>> Probably a different CAD program with more sophisticated fillets would do ok on that one.

Would you class Fusion 360 or Rhino better for filleting and a good companion to Moi3d? I hate Autodesk's online staying connected game though!

Thanks for all the help and tips though.

Hi Curious,

re:
> Would you class Fusion 360 or Rhino better for filleting and a good companion to Moi3d?

Fusion 360 - yes better at filleting.

Rhino - not really better at filleting but has other kinds of surface modeling tools that can make it a useful companion.

Some other ones that are good for filleting are ViaCAD and OnShape.

- Michael

...and the free DesignSpark Mechanical ;) (not a monster like Fusion 360 or OnShape , just a little cat! :)

https://moi3d.com/forum/index.php?webtag=MOI&msg=6186.51
(Scroll some posts for see all tricks import-Export Moi / DesignSpark - Step - Sab - Sat ) ;)

Fillets in direct Modeling!


Rendering inside the free Real time SimlabComposer Lite (maxi 1920 * 1080)


Subdivision inside Moi



After Subdivision Moi can only make a little fillet! DesignSpark can make many more!
And of course also when Moi fails for complex fillets!



Of course without Subdivision ...in pure Moi Nurbs...no problem! ;)