AngelCad will open a dxf 2d file, converts it to 3d and then it can
process the script to produce an stl file. But you can find its csg file
which can then be opened by openscad. It will probably be converted to a
polyhedron. Fwiw, Angelcad can often process openscad files to stl far
quicker than using openscad.

On 16/12/2021 11:33, gene heskett wrote:

On Thursday, December 16, 2021 7:24:30 AM EST Raymond West wrote:

I've dl'd it too. Might have to ask about it later.

Thanks Raymond.

Cheers, Gene Heskett.

"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.

• Louis D. Brandeis
  Genes Web page http://geneslinuxbox.net:6309/gene

It should be simply: linear_extrude(thickness) import("gear.dxf"); if it is
a 2D dxf file.

No need for other programs.

On Thu, 16 Dec 2021 at 13:54, gene heskett gheskett@shentel.net wrote:

Afak, openscad can not import dxf files with spines, and possibly other
dxf features fail, but it seems that angelcad imports them OK.

On 16/12/2021 14:11, nop head wrote:

On 16.12.2021 15:48, Raymond West wrote:

A couple of options for OpenSCAD users:

1. importing DXF files using features unsupported by OpenSCAD

---============================

For example, an .scad file might try to do:
linear_extrude(height=100) import("with_splines.dxf");

This will fail in OpenSCAD, but running the exact same .scad file with
AngelCAD instead will often work.

2. Create valid .scad file from DXF, even if it contains features
   unsupported by OpenSCAD (e.g. splines).

---===============================

In this case you can use the command line utility 'dxfread' that is
installed with AngelCAD, for example (assuming your PATH setting
includes the AngelCAD install folder);

C:\somedir> dxfread -scad with_splines.dxf

This creates a new file "with_splines.scad" containing a module
"with_splines_dxf()" which is accepted by OpenSCAD because it is just a
combination of booleans between polygons (the polygon discretization can
be modified using the -sectol option).

Change the failing code in your .scad file

from
linear_extrude(height=100) import("with_splines.dxf");

to
use <with_splines.scad>
linear_extrude(height=100) with_splines_dxf();

Then run the modified .scad file in OpenSCAD.

Carsten Arnholm

On 16/12/2021 15:57, Carsten Arnholm wrote:

and if you want it as 2d, easy to remove the linear extrude, unlike my
suggested method that produced a polyhedron, not a polygon. In windows,
worth making a batch file - If i can remember how.

On Thursday, December 16, 2021 12:38:04 PM EST Raymond West wrote:

This place has one heck of an echo Ray.

Cheers, Gene Heskett.

"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.

• Louis D. Brandeis
  Genes Web page http://geneslinuxbox.net:6309/gene

On 16/12/2021 15:57, Carsten Arnholm wrote:

and if you want it as 2d, easy to remove the linear extrude, unlike my
suggested method that produced a polyhedron, not a polygon. In windows,
worth making a batch file - If i can remember how.

Well, I've managed to hack together a simple bat file, and gone back
through the numerous dxf files I've created/accumulated over the last 30
or so years. I've not found any that I can't use the dxfread conversion
to get a useable (albeit a ton of polygons) scad file. The drawing below
also opens by importing the dxf directly to openscad, but the solids are
holes, and the holes are solids if I tried printing that, it would be a
multitude of pieces. And, the direct import does not show the code, so
there could be a restriction on the editing that could be done.

Carsten,

Is that due to the libraries you use or you're coding better DXF handling?

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