Re: [CAD_CAM_EDM_DRO] threads in 3D CAD

May I suggest you look at OpenScad?
While not a gui centric cad program,
it is not to difficult to start using.
OpenScad utilizes scripting to generate
3D models.

A 40mm cube = cube(40);
A 20mm sphere = sphere(20);

There are addon on libraries that
will enable you to generate gears
and screws.

The following code produces a 10 tooth gear.

include <MCAD/gears.scad>;
gear(number_of_teeth=10,circular_pitch=200);

It actually took me less time to generate a mockup using OpenScad than using AutoCAD.

Export models as STL OFF DXF CSG and Image.

Scott A. Tovey
--------------------------------------------------

Truth without love is brutality,
and love without truth is hypocrisy.
-Warren Wiersbe

Tough Love is not love,
It is an act of war.
-Scott A. Tovey

--- On Wed, 20/2/13, scyvt <scy@...> wrote:

> From: scyvt <scy@...>
> Subject: [CAD_CAM_EDM_DRO] threads in 3D CAD
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Date: Wednesday, 20 February, 2013, 8:47 PM
> Hello group
>
> Some years ago I took several trade school classes in CNC.
> The software was Inventor and Mastercam. Although I knew
> that I could never afford to own either, using them in class
> conditioned my expectations of what software should do, and
> I assumed that over time less costly programs would come to
> offer similar capabilities.
>
> Getting to the point, IIRC, parametric generation of threads
> of virtually any spec was easy in Inventor, and I assumed
> that some similar, if not so elegant, capability  would
> be included in any 3D modeling application. Now I have just
> learned to my great surprise that Rhino, which had become my
> aim to acquire, has no thread modeling capabilities.
>
> So my question is: do most 3D CAD have integral parametric
> thread generators, or is this considered a special
> capability?
>
> TIA
> Steve
>
>
>
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