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How to create a spiral sweep that thins out/tapers at the ends as it intersects with itself.

Question asked by Gol Swaboda on Sep 12, 2012
Latest reply on Sep 18, 2012 by Charles Culp

Hello everyone, I usually work with basic shapes that don't require extensive surface manipulation but I've been stumped over this problem for a good amount of time now.


What I'm trying to make:


A taurus/donut shaped object that gives off the appearance of swiveling on itself to create a pig's tail/spiral motif on both sides. (See sketch).


What I have done:


Created an oval profile sketch for a spiral swept boss/base path; so far it just looks like a slightly twisted taurus. (See sketch).


Doing a compressed helix/spiral with 2 revolutions brings out the shape I desire, but I still can't make the ends elegantly thin out.


I'm assuming there's a way to manipulate/vary the spiral sweep but I can't seem to wrap my head around it. Any help will be greatly appreciated.spiral.jpg