mbugert / laserscad Goto Github PK

I installed v0.3.0 on OS X.

I created an .scad file, including a call to lengrave, that by itself seems to work as expected in OpenSCAD itself.

I then cd’ed to the dist/ directory and found the following instructions in the laserscad README.md, which
appear to be in error:

    Under “Lasercutting template”
    the instructions say to “Open a shell and run:”
            cd laserscad/dist
            make engrave model=path/to/your/model.scad

    Then under “Engravings”, it tells you to invoke the very same commands.

From other clues, it would appear that the first command should be

            make cut model=path/to/your/model.scad

But when I run that, I get

$ make cut model=/Users/beesley/perso/shop/3D/openscad/projects/pads/pads.scad
Getting object bounding boxes...
Traceback (most recent call last):
File "util/extract_bounding_boxes.py", line 86, in
extract(*sys.argv[1:])
File "util/extract_bounding_boxes.py", line 26, in extract
with open(src, 'r') as file:
FileNotFoundError: [Errno 2] No such file or directory: '/Users/beesley/perso/shop/3D/openscad/projects/pads/_laserscad_temp/pads.echo'
make: *** [/Users/beesley/perso/shop/3D/openscad/projects/pads/_laserscad_temp/pads_bb.csv] Error 1

In the directory where my pads.scad is located, I see that a directory _laserscad_temp/ was created, but
it’s empty.

I continue to look into this, but I’m currently stuck.

Any suggestions?

• implement
• document
• example

Support for engraving lparts. Either to identify parts after they're lasered or just because it looks fancy.

• scad, makefile adjustments
• add png import to example
• documentation

Proper packing algorithm with multiple quality settings.

• basic implementation
• reasonable parameters (quality presets, cooling schedule)
• documentation/readme

I've spent a couple days trying to debug OpenSCAD's import behavior, when it turned out to be a problem with laserscad.

Laserscad prints the following failure message if any warnings come out of OpenSCAD in from laserscad.scad:

Error: OpenSCAD cannot find 'laserscad.scad'. Put 'laserscad.scad' in the OpenSCAD libraries folder or in the same folder as your model.

That statement is incorrect. In my case, the warnings were

WARNING: Ignoring unknown variable 'lkerf', in file laserscad.scad, line 150.
WARNING: Ignoring unknown variable 'lmargin', in file laserscad.scad, line 151.
WARNING: Ignoring unknown variable 'lidentify', in file laserscad.scad, line 152.

As a workaround, defining all three variables in my design silences the warnings.

• don't manipulate SVG via find/replace on plaintext, use proper XML
• add possibility to change line thickness of exported SVGs
• documentation

• Add major, minor, patch version to laserscad.scad and add a utility module which complains if the version does not match
• Document changes in readme

• nested lpart should be ignored
• nested ltranslate, etc. should behave as normal translate

This would allow intersections and differences between lparts.

I'm still having problems running laserscad on OS X. Here's the background:

On OS X v 10.13.6
Using laserscad v0.3.2

$ which openscad
returns /usr/local/bin/openscad

which is an executable bash script that looks like this:

#!/bin/bash
/Applications/OpenSCAD.app/Contents/MacOS/OpenSCAD $*

When I cd to the new v0.3.2 laserscad/dist and
invoke

$ make cut model=/Users/beesley/perso/shop/3D/openscad/projects/pads/pads.scad

it creates directory _laserscad_temp/ in pads/, puts file pads.echo in it, and then finds an error,
returning

$ make cut model=/Users/beesley/perso/shop/3D/openscad/projects/pads/pads.scad
Getting object bounding boxes...
OpenSCAD reports:
WARNING: Ignoring unknown variable 'lidentify'.
WARNING: Ignoring unknown variable 'lmargin'.
WARNING: Ignoring unknown variable 'lkerf'.
Error: Duplicate lpart id's: pad
make: *** [/Users/beesley/perso/shop/3D/openscad/projects/pads/_laserscad_temp/pads_bb.csv] Error 1

and exits. There's no further output.

The pads.scad file looks like this:
// pads.scad
// Kenneth R. Beesley
/*
Design pads (basically just circles) for saxophone keys to be cut
out of material by a laser cutter

The "material" will be a sandwich of neoprene rubber sheet (1/16"
to 1/8" thick) with a card backing already glued on.  The laser
cutter will need to cut through the rubber and the card backing.

The thickness of the material will vary.  Needs to be specified
for the laser-cutter, I assume?

*/

include <laserscad.scad>

// width of cut left by the laser cutter (see details of the machine)
kerf = 0.5;

thickness = 3; // affects only the development preview in OpenSCAD

// $fn value controls the roundness of the circles
$fn = 200;
font_color = "black";
font_size = 1.5;

module pad(diam) {
lpart("pad", [diam, diam]) {
// text to be engraved
lengrave(thickness, true){
color(font_color)
text(font="DejaVu Sans", size=font_size, str(diam),
halign="center", valign="center");
}
// engrave the text onto a basic cylinder
cylinder(h=thickness, d=diam + kerf);

}

}

module pad_with_hole(odiam, idiam) {
lpart("pad_with_hole", [odiam, odiam]) {
// text to be engraved
lengrave(thickness, true){
color(font_color)
translate([0, 2, 0])
text(font="DejaVu Sans", size=font_size, str(odiam), halign="center",
valign="center");
}

    // engrave the text onto a cylinder with a hole in the middle
    difference() {
        cylinder(h=thickness, d=odiam + kerf);

        translate([0, 0, -1])
        cylinder(h=thickness + 2, d=idiam - kerf);
    }
}

}

union() {
translate([-24, 0, 0])
pad(8.5);

translate([-13, 0, 0])
pad(10);

pad(13);

translate([16, 0, 0])
pad_with_hole(15, 2);

}

********* end of pads.scad ********

So that's where I'm stuck.

What do I need to do to get this working?

Thanks,

Ken

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