Hello world

I'm trying to use Matthew Venn's scad script to create a slicer that will
import stl files and then export each slicel as a dxf file. See his original
code at the bottom.
https://github.com/mattvenn/cad/blob/master/openscad/layer_demo/layer_demo.scad

Is there a way I can write an "export dxf" module so each slice will get
exported as a dxf? (layer1.dxf, layer2.dxf, etc.)

Right now it simply prints to the console.

//define some variables
//can vars
can_radius = 6;
can_wall_thickness=1;
can_height = 30;
top_cone_h = 2;
//nozzle vars
nozzle_h=3;
nozzle_r = 2;
//calculated variable
total_can_height=can_height+top_cone_h+nozzle_h;
echo(str("can height:", total_can_height));
//global vars
smooth=20; //circular shapes are drawn with this number of edges
slice_thickness=1;
//so we can choose what to do from the command line
make_can=true;
//slice_can=true;
import_slices=true;
//get_single_slice=true;
//cut_level=20;
//make a simple 3d model of a can
module make_can()
{
//the body
color("grey")
//the 0.1 is to make sure the objects merge together
difference()
{
cylinder(r=can_radius,h=can_height+0.1,$fn=smooth);
translate([0,0,can_wall_thickness])
cylinder(r=can_radius-can_wall_thickness,h=can_height-can_wall_thickness2,$fn=smooth);
}
//the top cone
color("grey")
translate([0,0,can_height-0.1])
cylinder(r2=nozzle_r,r1=can_radius0.8,h=top_cone_h+0.1,$fn=smooth);
//the nozzle
color("white")
translate([0,0,can_height+top_cone_h])
cylinder(r=nozzle_r,h=nozzle_h,$fn=smooth);
}

//slice the part into sections
module slice_can()
{
for(cut_level=[0:slice_thickness:total_can_height])
{
projection(cut=true)
translate([cut_level/slice_thickness3can_radius,10,-cut_level])
make_can();
}
}

module get_single_slice()
{
echo(str("cut level:", cut_level));
projection(cut=true) //cutting it at plane z=0
translate([0,0,-cut_level])
make_can();
}

module import_slices()
{
translate([can_radius*3,0,0])
for(cut_level=[0:slice_thickness:total_can_height-1])
{

echo(str("layer", cut_level, ".dxf"));
translate([0,0,cut_level*2]) //*2 to explode it
color("gray")
linear_extrude(height=slice_thickness) import(str("layer", cut_level,

".dxf"));
}
}
//do it
if(make_can)
make_can();
if(slice_can)
slice_can();
if(get_single_slice)
get_single_slice();
if(import_slices)
import_slices();

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Hi Marius,

Thanks for the reply. Coincidentally, I was going to email you about the
google summer of code projects. It sounds like there is some overlap.

Torsten,

Thanks for reply. I will try that out with dxf files.

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What about evolving the animation with an export option? Use $t to define the
slices and a box to allow export (export type by use of extension).

??

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This is what I have so far for a slicer. Basing this work off of clothbot and
Matthew Venn's slicer.

All feedback is welcome.

// rough draft for a slicer that can export to dxf

z_min=-7; // this was found by experimenting with different values
z_max=15;
slice_width=1; //need to add 1 to whatever your desired thickness is
//layer=5; //z_min<layer<z_max, using this instead of for loop for now
because the for loop is so slow
slice_count=(max_z-max_z%slice_width) / slice_width + 1;
echo("Max Z ", max_z, " sliced into ", slice_width, " width slices: ",
slice_count);

module model()
{

import("C:/Users/z003EE9Y/Downloads/stl_files/nozzle_0pcs00-cbg11-030-a04-master_hr.stl");
//need to figure out where stl is located
}

module slice_model()
{
for(layer = [z_min:slice_width+1:z_max]) //for (i= [start:step:end]
{
echo(str("Layer:", layer)); //print on console

		projection(cut=true) //project z=0 onto the xy plane
	translate([0,0,layer])	//	move the part by z index
		model();	

	//this is the hardpart
	// sliceFileName="Model_name_layer."+layer+".dxf";
	// export_dxf( sliceFileName, slice_model(index=layer);
	}

}

slice_model();

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Just curious.. did you have a look at Slic3r? I don't know if DXF is supported,
but Slic3r can export slices as multi-layer SVG file.

ciao,
Torsten.

thanks for the tip. that would make life easier.

Tried it out right now. How could I split each layer in the svg into
separate svg files?

still, i've spent so much time on this issue that i am now resolved to come
up with a solution.

see below
https://github.com/openscad/openscad/wiki/Project:-Improve-DXF-import-and-export

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