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Drawing a wedding band in 3D, multiple sweep radii

Question asked by Joe Agate on Aug 1, 2013

Im trying to draw a wedding ring. Looking at the front of it, the ring has a round inside diameter and a concentric outside diameter. The thickness between both the ID and OD is the same throughout.  However looking at the top view of it, there is one radius that changes into a different radius multiple times.

 

I tried making a 3D sketch and then sweeping along that 3D sketch, however I cannot put in dimensions for the 3D sketch. Im unsure how to get started in drawing this.

 

Attached is a picture and the file I tried to use for clarity.

 

PLEASE HELP!!! 

 

 

IMG_4289.PNG 

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