Is there any simple way of creating tappered thread in OpenSCAD? I need something like 10 mm in diameter at the end, 9 at the top and the height of 10 mm.
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Could you elaborate on what approach you took, what you've already tried and why it failed? That might help possible asnswers to know where to start explaining. – kamuro Jun 18 '16 at 19:54
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There's plenty of libraries for OpenSCAD for creating threads. Just couldn't find any for tapered thread (i.e. pipe thread). – Larry Kosher Jun 19 '16 at 19:25
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If your math and OpenSCAD skills are superior to mine, you may be able to make use of the OpenSCAD Metric Nut, Bolt & Threads Library located here: OpenSCAD Metric Nut, Bolt & Threads Library
It uses various means to generate polygons about a radius and includes the formulae for partial revolutions. It is presumed in the design that the center of rotation for the generated polygons is constant. I looked over the code for outside thread and could easily determine the radius references.
With proper coding, you could generate a variable radius based on the height of the cylinder at a specific point and achieve the tapered effect you require.
I expect that you'd have to reduce your desired radius by a fraction, say 0.05 mm in order to embed the thread forming polygons within your tapered cylinder.
If you aren't a strong coder, disregard this answer.
fred_dot_u
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So, no ready solution. Thanks for the comment. Will play with the library. – Larry Kosher Jun 19 '16 at 19:23
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I have contacted Dan Kirshner (the author of openscad threads library) and he has updated the library. Now it supports tapered threads. Thanks, Dan!
Larry Kosher
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