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Extruding a triangle along a helix you will get it twisted. Unfortunately you have no control over this twist so I would recommend you an other approach. Draw tree helixes representing the top and the bottoms of a thread (passing trough the corners of the triangle). Now create two surfaces between the larger helix and the two inner ones.
Post here if you need more details.
See HERE something similar
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Thread: screw?
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15th Dec 2005 02:24 am #1Forum Newbie
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screw?
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how do i draw a wood /self tapping screw in 3d with autocad 2004?
i've tried a combination of extruding triangles around a helix but can't quite get it to look right (or convincing)
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15th Dec 2005 05:46 am #2Super Moderator
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It's nice to be nice, but sometimes is nicer to be evil!.
Tip: Please do not PM or email me with CAD questions - use the forums, you'll get an answer sooner.
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15th Dec 2005 07:38 pm #3Forum Newbie
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many thanks for that.
experimenting now...
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22nd Apr 2007 04:38 am #4
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i found a .3ds file but i have no idea how to import it, i'm not quite understanding how you link the small and large helix together if i was to make a screw myself in autocad2007... help ?
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