Can't Fillet. Any Ideas?

[francesco.bacchini]

Don't know why can't build the fillet on the red edge. Any hints? What should I check?

fillet should be built going down and inside

[BarryKimball]

There is no way to answer this question without a file or more information...

[francesco.bacchini]

Dear @BarryKimball , am I allowed to upload the file here?

[BarryKimball]

I think that you need to zip the file first, then upload

[Anonymous]

Try to lower value of the round. 

[Anonymous]

Three things to try:

1: Like the previous poster suggested: start with the fillet size value that is much smaller than you want - so you don't crash into the outer fillet you already made. Then adjust the fillet size up.

2: Check positional and tangency continuity on all the vertical surfaces you are filleting. If there is a gap or slight tangency break, fillet will fail.

3: The flat horizontal surface that you are trying to fillet may need to have more "spans" for the complex curve-on-surface loop the fillet creates. It's a NURBS math thing. Use "Insert" on the horizontal rim surface multiple times to create 4-8 spans in both directions. Or untrim, rebuild it with 4-8 spans in both directions, and retrim. If it is truly planar, rebuild shouldn't cause continuity problems.

I Hope one of these helps. Ciao!

[Michael-GG]

It is also worth mentioning that we had a fillet bug in Alias 2021.2, which prevented the fillet tool to work in certain cases. If you are using Alias 2021.2, you should try upgrading to our hotfix 2021.2.1.
Thanks,
GG