Slicing issue

[nenadalm]

Hi. I have issues with slicing one objects (details below).

versions of used programs

• Slic3r: 1.2.9
• OpenSCAD: 2015.03-1

files

• scad file used to generate stl using openscad
• generated stl
• png showing how the object should look like (taken from openscad)
• png showing how the object was sliced (taken from preview of slic3r)

[t-paul]

That's probably not a slic3r issue, the geometry generated by the platform() module seems to have very thin walls between the segments. That causes the model to come out non-manifold.

[nenadalm]

thanks for your response, I found something about it and will try to check it: https://blender.stackexchange.com/questions/7910/what-is-non-manifold-geometry

[nenadalm]

Thank you very much! Not sure why I had thin walls there (I thought that it's ok if they dissapear on rendering - I saw them just in preview).

I used better polygons instead of some strange polygon diffs I used before and now it works: https://mega.nz/#!dVw2xJSK!_OwHRpW8QOjCk9j75EP6g3AJfjA-Wns0bzcLmictUjs (or diff here: nenadalm/3d-print@f3fbd4d)

Now going to read the link I posted :)

[t-paul]

Another option is to generate the full polygons first using the new list comprehension features and extrude to 3D last, e.g.:

module platform(d) {
    r = d / 2;
    angle = 360 / chunks;

    linear_extrude(height = grille_fill_h) difference() {
        polygon([ for (i = [0 : chunks - 1]) cartesian_from_polar(length = r, angle = i * angle) ]);
        polygon([ for (i = [0 : chunks - 1]) cartesian_from_polar(length = r - thickness, angle = i * angle) ]);
    }
}