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Creating a variable profile, variable pitch, tapered helix

Question asked by Pete Lilley on Aug 2, 2016
Latest reply on Aug 2, 2016 by Peter Brinkhuis

I'm trying to create a shape that tapers along it's length, has a variable pitch and the profile changes from Ø2.8125 at one end to Ø3 at the other end.  I believe I know how to do it but SolidWorks won't cooperate.  I'm using sweep with a variable helix as the path and a second variable helix as the guide to enlarge the profile as it progresses down the helix.  I believe the problem is because of self intersecting geometry but I can't find a work around.  Sometimes it gives me a preview that looks good and sometimes it just creates a little fraction of the part, (see picture).  Can anyone get this to work?

variable helix.png