using fillet on a complex solid

[jongor]

I redrew the outline, much simpler now, see attached.

 

The white lines aren't joined because those don't need to be filleted.

 

Extruding just the red creates an extruded surface, which can't be filleted

 

Joining into one continuous spline and then extruding then trying to do a 3d Filletedge produces this:

 

"Modeling Operation Error:

Face-face blend geometry ill-defined or undefined."

 

j body.dwg

[JD Mather]

I didn't open the file yet - but when you have any combination of splines, lines, arcs, polylines - use presspull instead. Actually, you can almost always use presspull rather than extrude.

 

I was able to extrude and fillet your file in Autodesk Inventor.

 

[jongor]

JD,

 

Used Presspull, got this:

 

Modeling Operation Error:

Face-face blend geometry ill-defined or undefined.

Failed to perform blend.

Failure while filleting.

[ReMark]

Was that using the same drawing as you attached to post #21?

[jongor]

I don't see any post #'s...but 3 post back from yours.

[JD Mather]

Presspull gave me the solid - but the fillet failed like it did for you so I gave up on AutoCAD and took it over to a modern 3D CAD program, Autodesk Inventor.

Students can download Inventor for free from http://www.autodesk.com/edcommunity

[jongor]

I have full-blown AutoCAD 2014 but didn't get Inventor with my initial download, and trying to install it today is not working, some error about being disconnected from Autodesk servers, and maybe a firewall is blocking it...., I am working with a VPN today. I suspect I won't be able to download it as a student because of my current license.

 

I was able to download Vault (which I assume contains the Inventor install) but not install...weird.

 

I did however just download Fusion360 and first attempts are failing there too.

[SEANT]

. . . .

 

The white lines aren't joined because those don't need to be filleted.

 

. . . .

 

 

One of the two lines you would prefer not be filleted will cause issues where it meets the spline. The fillet command will not automatically add connecting faces. If you are trying to keep the juncture of the two white lines sharp then additional modeling to allow continuity is necessary. The attached is an example.

body_with FilWork.dwg

[jongor]

Thank you, but how did you do that?

 

I wasn't able to fillet even if I did join the red and white.

[SEANT]

Make sure the Line and Spline are tangent. Extrude or PressPull. The Spline geometry will only support a fillet of about Radius = 0.25. More than that and the resulting fillet surface would intersect itself.

 

Try on the attached.

bodyAsReg.dwg

[jongor]

This is what I'm shooting for

 

 

But the radius has to be 1/2".

 

I'm doing this as an exercise (and fun!) to have a body milled by a local CNC guy.

 

I don't have any of the tools/equipment required to build a bass and would like learn about cnc/cad interface.

[SEANT]

The radius can be 1/2" but will not be the result of a Fillet command. The fillet processing for solids can not account for a surface that would self intersect. Surface modeling techniques may help, but they tend to be more involved than just picking the edge of a solid.

 

Let me see if I can work up a sample.

[SEANT]

The file sizes are increasing. Let's see if this uploads.

BodyViaSurf.zip

[SEANT]

The previous upload is the fillet as a surface. It's pretty good, though the pure 1/2" radius breaks down a little bit. Maintaining fidelity would probably make the file even larger.

 

Here is the fillet surface incorporated into a solid.

BodyViaSurf2.zip

[jongor]

How'd you do that?

[SEANT]

If you look at the BodyViaSurf file you will see the Arcs and Paths I used as construction geometry. Those were lofted to create the surfaces. The surfaces were used (along with some not shown Planar Surfaces) with the Sculpt command to create the Solid.

[jongor]

SeanT,

 

What program did you use to do the BodyViaSurf file?

[SEANT]

AutoCAD 2013. The later releases of AutoCAD have a pretty comprehensive set of surfacing tools.

[jongor]

I have 2014....what tools/methods did you use?

[SEANT]

I have 2014....what tools/methods did you use?

 

Predominantly LOFT. If AutoCAD baulks at the selected geometry, alternate the Primary/Guide curves. See this demo:

https://chronicle.autodesk.com/Main/Details/63030a60-d78c-41ae-8459-a33edea81ff8