I'm trying to create 3D model to print a stamp. I started with Inkscape SVG
file with some text converted in single path in it. Then I convert it into
DXF format with plugin for Inkscape. Then I import it into OpenSCAD and
extrude the stamp. The problem is that the stamp should have a cone-like
shape. The letters must become thick at the bottom. I did't find the way to
this using extrude command so I sliced the model into a set of layers and
applied different offset values to each layer. But the result has a lot of
artifacts. Is there another way to do it instead of slicing?

for(i=[0:30]){
translate( [0, 0, 0.7i/30] )
linear_extrude(height = 0.7/30, convexity = 10,scale=1,slices = 1)
offset(r = 0.2i/30)

import(file = "drawing1.dxf",center = true,scale=1.5);
}
translate( [-2,-2,0.7] )
cube(size = [50,50,0.2]);

Here is the DXF file that I used https://cloud.mail.ru/public/3kaU/3w7h3czN1

http://forum.openscad.org/file/t2613/2.png

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Unfortunately scale works with respect to single point in the model. This
leads to distortion (see the attached picture).
http://forum.openscad.org/file/t2613/3.png

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Not at all. The scale has a different effect. The inner parts of the letters
will also lean outward. I'd like them to lean in. More like an offset
action.

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Something like this?

http://forum.openscad.org/file/t1309/chamfered_letters.jpg

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Similar. The only difference is that the letters should have an initial
thickness at the top and expand to the bottom.

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https://www.thingiverse.com/thing:3089014

Apparently, there's a "thingi" out there that does what you require!

OpenSCAD based of course.
On Monday, July 29, 2019, 10:11:58 PM EDT, Fram valkrsk@gmail.com wrote:

I'm trying to create 3D model to print a stamp. I started with Inkscape SVG
file with some text converted in single path in it. Then I convert it into
DXF format with plugin for Inkscape. Then I import it into OpenSCAD and
extrude the stamp. The problem is that the stamp should have a cone-like
shape. The letters must become thick at the bottom. I did't find the way to
this using extrude command so I sliced the model into a set of layers and
applied different offset values to each layer. But the result has a lot of
artifacts. Is there another way to do it instead of slicing?

for(i=[0:30]){
    translate( [0, 0, 0.7i/30] )
linear_extrude(height = 0.7/30, convexity = 10,scale=1,slices = 1)
offset(r = 0.2i/30)
   
import(file = "drawing1.dxf",center = true,scale=1.5);
}
translate( [-2,-2,0.7] )
cube(size = [50,50,0.2]);

Here is the DXF file that I used https://cloud.mail.ru/public/3kaU/3w7h3czN1

http://forum.openscad.org/file/t2613/2.png

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