Fillet problems

[elinkH83L7]

Hi, I am new to Fusion 360 and have a question regarding fillets. I am working with very irregular shapes like unicorns and dinosaurs. Now I need to apply a full fillet radius on top of the surface as the picture shows. I am able to apply a 1,44 mm  fillet on each edge, but I need a full radius where each edge is 1,5 mm. The extrude is 3 mm wide. Is this possible and how? You can also see that I have applied a fillet in the bottom edge. Here I could apply 2 mm but not more and only if I was selecting each curve segment at a time. Do you have any input on how to be able to create a bigger fillet here? Does my shape geometry limit here? 

Thanks in advance for any input. 

Elin

[g-andresen]

Hi,

Please share the file.

File > export > save as f3d on local drive  > attach it to the next post

günther

[jeff_strater]

The first thing to check is whether you have any "near tangencies" in your base sketch.  Those are curves which are very close to being tangent, but not constrained to be so.  For reasons I don't understand, this causes a lot of problems for the Fillet code.  If you are "working with unicorns and dinosaurs", I'm going to venture a guess that you are importing SVG or DXF geometry into your sketches that were likely designed somewhere else (Adobe Illustrator, InkScape, etc).  Those environments, because they are intended for graphics output, do not have the accuracy that is needed for solid modeling.  There are no tangent constraints in Illustrator...

If this is the issue (hard to say without the design), sometimes you can get away with editing the sketch, and applying some tangent constraints.  In some cases, though, that can cause unwanted changes to your unicorn.  In those cases, I would probably recommend re-tracing the geometry using native Fusion spline curves.  This is tedious, but you can get pretty good at it pretty quickly.

Anyway, share the design, and someone here will take a look.