72 lines
2.7 KiB
OpenSCAD
72 lines
2.7 KiB
OpenSCAD
//
|
|
// NopSCADlib Copyright Chris Palmer 2018
|
|
// nop.head@gmail.com
|
|
// hydraraptor.blogspot.com
|
|
//
|
|
// This file is part of NopSCADlib.
|
|
//
|
|
// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
|
|
// GNU General Public License as published by the Free Software Foundation, either version 3 of
|
|
// the License, or (at your option) any later version.
|
|
//
|
|
// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
|
|
// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
// See the GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License along with NopSCADlib.
|
|
// If not, see <https://www.gnu.org/licenses/>.
|
|
//
|
|
|
|
//
|
|
//! Cable zipties.
|
|
//
|
|
|
|
include <../utils/core/core.scad>
|
|
use <../utils/rounded_polygon.scad>
|
|
|
|
function ziptie_width(type) = type[1]; //! Width
|
|
function ziptie_thickness(type) = type[2]; //! Thickness
|
|
function ziptie_latch(type) = type[3]; //! Latch dimensions
|
|
function ziptie_colour(type) = type[4]; //! Colour
|
|
function ziptie_tail(type) = type[5]; //! The length without teeth
|
|
|
|
module ziptie(type, r, t = 0) //! Draw specified ziptie wrapped around radius ```r``` and optionally through panel thickness ```t```
|
|
{
|
|
latch = ziptie_latch(type);
|
|
lx = latch.x / 2;
|
|
zt = ziptie_thickness(type);
|
|
cr = zt; // sharp corner raduus
|
|
z = r + t - cr;
|
|
x = r - cr;
|
|
inside_corners = t ? [ [0, 0, r], [-x, z, cr], [x, z, cr] ] : [];
|
|
outside_corners = t ? [ [0, 0, r + zt], [-x, z, cr + zt], [x, z, cr + zt] ] : [];
|
|
x1 = lx - zt / 2;
|
|
x2 = x1 + x1 * zt / r;
|
|
inside_path = concat([ [0, 0, r], [x1, -r, eps] ], inside_corners);
|
|
outside_path = concat([ [0, 0, r + zt], [x2, -r - zt, eps] ], outside_corners);
|
|
|
|
tangents = rounded_polygon_tangents(outside_path);
|
|
length = ceil(rounded_polygon_length(outside_path, tangents) + ziptie_tail(type) + latch.z + 1);
|
|
len = length <= 100 ? 100 : length;
|
|
width = ziptie_width(type);
|
|
|
|
vitamin(str("ziptie(", type[0], ", ", r, "): Ziptie ", width, "mm x ", len, "mm min length"));
|
|
|
|
color(ziptie_colour(type)){
|
|
linear_extrude(width, center = true)
|
|
difference() {
|
|
rounded_polygon(outside_path, tangents);
|
|
rounded_polygon(inside_path);
|
|
}
|
|
|
|
translate([lx, -r])
|
|
rotate([90, 0, 0])
|
|
union() {
|
|
rounded_rectangle(latch, 0.5, center = false);
|
|
|
|
translate_z((latch.z + 1) / 2)
|
|
cube([ziptie_thickness(type), ziptie_width(type), latch.z + 1], center = true);
|
|
}
|
|
}
|
|
}
|