Fillet Problem...need help

[Murat786]

Hello

I dont know what went wrong I tried the whole day to figure out why I cant make the last fillet on thos knife handle...

The champfering works well all around the handle slap but with the last fillet here I cant make it...

For any help I would be very thankfull.

Best Regards

Edit: I allready triet it with a very smal diameter ...0,5 mm as well ....nothing works on this edge... no fillet possible here !?

Here is a link to the file...if some one wants to try it out and help me 😉

https://myhub.autodesk360.com/ue29f8eca/shares/public/SHabee1QT1a327cf2b7a882918c9c6fb7c7c

Thanks in advance and best Regards

[innovatenate]

Thanks for posting to the forum and welcome to the community!

I'm not quite sure of the cause just yet, but I do have an observation to add. Can I ask about the origins of this file? Is this imported geometry?

If I rebuild this geometry from scratch, an create the curvy handle surface with a curvature continuous spline, I can get the fillet command to work in many different orders.

Fee free to download this file for reference from the below link.

https://myhub.autodesk360.com/ue29c8e8f/shares/public/SH7f1edQT22b515c761e20e4827b76eba8da

I hope that helps. Please let me know if you have any questions.

Thanks,

[innovatenate]

I hope that helped.. Please let us know if you have any questions or concerns... 

Thanks,

[Murat786]

Thank you very much for you help

The problem is still there...and yes that geometry was imported to fusion 360

But i build the handle completly new from scratch directly in fusion 360 ...and now everythink works fine.

Thank you

Best regards

Murat Klein

[wilkhui]

Hi Murat,

Unfortunately it looks like you came across one of the issues that can happen with imported data; near-tangent edges. While these aren't illegal, they can cause unpredictable behaviour, such as the failure that you saw.

A symptom of a near-tangency is when you see edges that seem out-of-place or a fillet 'running out', like in the thin wedge shaped fillet in your picture 'fillet 3.jpg'. To confirm any suspicions, you can inspect the curvature using the Zebra Analysis and this will show smooth lines over smooth surfaces while highlighting edges by displaying a kink. Here's how the part you imported looks in that area, note the kink in the zebra when it gets to the out-of-place edge:

Nate gives a nice workaround, which is to select all the edges in one go and the fillet algorithm goes ahead and takes the near-tangency in its stride. For any further modelling with this part, you'll have fewer issues downstream by rebuilding it (which is what you've done by the sound of things) to ensure that the places which are meant to be tangent are indeed tangent.

Hopefully this helps explain why you found difficulties with this part but feel free to ask us anything futher.

Cheers,

Indy