Quote:
Originally Posted by araporta
Thats the first place I looked, and it doesn't really help. I can see how to enter a parametric equation, such as that in post #5 above, but I don't get how to enter Ether's equation in post #8, which is not parametric? Its probably trivial, but I just can't see how to do it.
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Okay, I have downloaded Solidworks, and I have something that may get you to where you want. I have attached screenshot aids, but here is what I did. I created a Spiral with a starting diameter and a pitch of half of the difference in diameters. Then I converted it to a 2D Sketch, connected the endpoints, and extruded it.