Search this forum. There have been a number of threads over the last several years dealing with this problem. I'd try using the Bend tool, I think. I'm not sure whether you can bend more than 360°, though. But be aware that this is going to be a resource hog-- helices are really math-intensive. If you don't need a functional model, you might consider using a textured appearance instead, kind of like the cosmetic threads that Inventor uses on screws.
Sam B
Inventor 2012 Certified Professional
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Inventor Professional 2013 SP1.1 Update 1
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still waiting for a foreshortened radius dimensioning tool in Drawing Manager
Well, Thank you for your quick response
But I tried the Bend comand, it could not help me.
Thank you again for your time sir.
A better way is with an Excel formula of points to generate a sweep curve.
In Inventor 2013 you can enter the formula directly (unfortunately I don't know it by heart - a search should return the forumla to use).
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