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digitalphaser  
#1 Posted : Friday, April 17, 2015 1:48:41 PM(UTC)
digitalphaser

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Hi! I use a viaCad Pro 9. Has anyone any idea how to make a spherical Helix.

UserPostedImage

Thanks!

Edited by user Friday, April 17, 2015 1:49:24 PM(UTC)  | Reason: Not specified
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NickB  
#2 Posted : Friday, April 17, 2015 4:38:40 PM(UTC)
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I think I have it.

Using the Helix Spline tool, create two paths one of a small diameter, and an outer of a diameter greater than the diameter of your finished part.
Extrude a spiral surface between these two helixes.
Create a surface sphere of the diameter that you want your final sphere to be (minus the radius of your wire).
Use the spiral surface to cut the sphere surface.
Use the Explode Curve tool to create a spherical helix that follows the path of the cut on the sphere.
Finally use the extrude pipe tool to create a rod that follows the spherical helix path that you created.
File Attachment(s):
Spherical helix.sfx (936kb) downloaded 16 time(s).
NickB attached the following image(s):
SphericalHelix.png (83kb) downloaded 7 time(s).

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Shark FX 9 build 1143
OS X 9.5
3.6 GHz Core i7, 8GB, GTX 760 2GB

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thanks 2 users thanked NickB for this useful post.
digitalphaser on 4/18/2015(UTC), ProUser on 7/12/2015(UTC)
Tim Olson  
#3 Posted : Saturday, April 18, 2015 12:10:29 AM(UTC)
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Nick very clever approach!

I noticed the surface was a bit heavy as a 2 rail sweep and found a ruled surface lighter.

Tim
Tim Olson
IMSI Design/Encore
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digitalphaser  
#4 Posted : Saturday, April 18, 2015 6:53:06 AM(UTC)
digitalphaser

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Many thanks to @NickB.
I have seen a similar solution in SolidWorks. But did not think, how can I use this method in viaCAD. My mistake was. I took the solid sphere and tried to split it.

Special thanks for the attached file.
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NickB  
#5 Posted : Saturday, April 18, 2015 4:55:30 PM(UTC)
NickB

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Originally Posted by: Tim Olson Go to Quoted Post
Nick very clever approach!

I noticed the surface was a bit heavy as a 2 rail sweep and found a ruled surface lighter.

Tim


Yes. The two rail sweep was really funky, but it looked good enough to get a very good approximation of a spiral.
Shark FX 9 build 1143
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