Problem sketching on curve surface, loft and mesh

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javier_zapater
Posts: 2
Joined: Sun May 24, 2020 2:18 pm

Problem sketching on curve surface, loft and mesh

Postby javier_zapater » Sun May 24, 2020 2:50 pm

Hello all,

First time I post, and I appreciate in advance your time and interest on helping me on this. I tried first to check whether there were some topic covering my issue, but the forum is very big and maybe there is one already solving my problem, but honestly I could not find it.

I am using Curves WB (developed by @Chris_G) to sketch on curve surfaces (cone in my example), loft them with some thickness. I want to print3D with embossing geometries on the curve surface, lofted and pocketed. For the moment struggling to find how to loft sketches in the curve surfaces.

I am using for that "Map a sketch on a surface" command from Curves WB. The map goes fine, however, I was not able to Boolean Union both the Solid (cone) with the Sketch (on the curve surface). I tried then to convert the Sketch on a solid (by using Part WB and Menu command "Convert to a Solid"). Then I managed to boolean union both, but now I lost the thickness of the lofted sketch. So useless for my purpose to print3D

Any hint what I could do to keep the union with lofted sketch and be able to create Mesh to export .stl and print3D?

Thanks a lot for your support.

javier


OS: Windows 10
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.4 (GitTag)
Build type: Release
Branch: releases/FreeCAD-0-18
Hash: 980bf9060e28555fecd9e3462f68ca74007b70f8
Python version: 3.6.6
Qt version: 5.6.2
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: Spanish/Spain (es_ES)
Attachments
test sketch on curve surface.FCStd
(48.14 KiB) Downloaded 3 times
TheMarkster
Posts: 1744
Joined: Thu Apr 05, 2018 1:53 am

Re: Problem sketching on curve surface, loft and mesh

Postby TheMarkster » Sun May 24, 2020 8:47 pm

Could be a coplanar face issue. Set the offset property of the sketch on surface object to -0.01mm. You should then be able to fuse the cone and the sketch on surface object.
Snip macro screenshot-729b0c.png
Snip macro screenshot-729b0c.png (183.09 KiB) Viewed 89 times
Attachments
test sketch on curve surface(v2).FCStd
(32.83 KiB) Downloaded 3 times
My FreeCAD video series on youtube: https://www.youtube.com/c/mwganson
javier_zapater
Posts: 2
Joined: Sun May 24, 2020 2:18 pm

Re: Problem sketching on curve surface, loft and mesh

Postby javier_zapater » Sun May 24, 2020 9:50 pm

Hello TheMarkster, thanks a lot for your swift and useful response. It works !!, (I need to learn about the offset :-).

Thanks a lot for your time and effort.

Regards