Hi Jakub, yes thin pointy areas like you show there can be difficult to get filleted. You might try exporting to a different CAD program that has more robust filleting than what MoI has, some candidates for that would be ViaCAD, Fusion360, or OnShape. They may also have some difficulty with the kind of junctures you have here though.
One thing that is probably increasing the difficulty in your case is the inaccuracy in this area:
That plane and cylinder are not tangent to each other but they are pretty close like about 2 degrees off. Things that are close to being smooth but only just a little bit off tend to make for more difficult filleting. What happens is when 2 surfaces approach being smooth the fillet between them gets smaller and smaller and when it's just a couple of degrees off that tends to make a really thin skinny fillet there which then is more difficult to handle collisions with other fillet pieces at juncture areas.
So it can be good to take extra care early on in spots like that to make those things fully tangent to each other instead of just close.
Another thing that filleting doesn't like is coplanar pieces like this:
That one is easy to fix though, just delete those 2 bottom faces and then select your main object and use Construct > Planar to get a single larger cap down there.
Then to make progress like Phiro shows above I think, it can be helpful to put in some larger radius fillets in some key spots that can help make for a smooth chain of edges for doing smaller radius fillets. A set of edges that is all smooth is fundamentally easier to get filleted than ones that are meeting up sharply. The fillet segments on smooth edges naturally meet up with each other while at sharp junctures they have to be extended and intersected with each other and side walls.
So something like this could be a good next step:
- Michael |
