Full Version: Uniform fillet

Hello,

I'm trying to apply a fillet to this object, but the result isn’t what I expect.
Here is the object before the fillet, with the edges selected:



After applying the fillet, the offset/distance becomes uneven along the curve:


Any tips on how to get a uniform, consistent fillet along the whole surface?

Tks,
Ulisses

Attachments:
Torneira.3dm

Image Attachments:
Screenshot 2025-12-04 at 00.00.29.png  Screenshot 2025-12-04 at 00.01.33.png 

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Hi ulisses, the standard CAD fillet (called "rolling ball fillets") keeps a uniform radius value and lets the width of the fillet change to a longer or shorter arc.

So for example in the case you show, if you make a fillet of radius 0.6, you should see that both of these edges are radius 0.6 arcs:





Some more details and illustrations of the constant radius fillet behavior here:

https://moi3d.com/forum/index.php?webtag=MOI&msg=11701.11
https://moi3d.com/forum/index.php?webtag=MOI&msg=2510.2
https://moi3d.com/forum/index.php?webtag=MOI&msg=11045.4


In the fillet command there is a "Shape" option that you can switch from "Shape: Circular" (which makes rolling ball fillets) to "Shape: Const dist" which will allow the radius to vary and instead keep the distance between the arc's endpoints to be a constant distance, try setting that:



When that is in place, the 2 edges shown above will be arcs of different radius values but the chord length between their ends will be constant:





- Michael

Image Attachments:
ulisses_fillet1.jpg  ulisses_fillet2.jpg  ulisses_fillet3.jpg  ulisses_fillet4.jpg  ulisses_fillet5.jpg 

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