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Feed Screw Modelling

Feed Screw Modelling

Feed Screw Modelling

(OP)
I'm trying to model feedscrews using Inventor 2008.  I've extruded a 1" diameter rod 2 feet.  I need a 90 degree v groove with a 1.5" pitch the length of the rod.  I've tried using the coil feature with the profile I need but since a coil twists the profile it does not represent what is cut with a cutting tool.  I need the full profile to be visible when looking perpendicular to the axis of the rod.  The only other option I came up with was using a sweep with a coil made in the 3d sketch mode.  I was thinking a guide face might keep the profile from twisting like it did when I coiled it but everything I chose for a face either created an error when modeling or didn't help.  Has anyone had experience with this?  Any help would be greatly appreciated.  Thanks.

RE: Feed Screw Modelling

Attach your file here.
I would use surface coil rather than 3D Sketch Helix.

RE: Feed Screw Modelling

I would start by reading these documents
http://home.pct.edu/~jmather/AU2006/MA13-3%20Mather.pdf
http://home.pct.edu/~jmather/AU2007/MA105-1L%20Mather.pdf
first thing I noticed is that your Sketch1 circle was placed at the origin - but not constrained to the origin.  This should be automatic.
Then I noticed that your Sketch2 is not constrained and that you are using a lot of uneeded dimensions rather than geometry constraints.  (see attached)
I have never had much luck helping someone till they mastered the basics of sketching.

RE: Feed Screw Modelling

(OP)
Thanks for the links.  I'll get up to speed.

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