NopSCADlib/printed/ssr_shroud.scad

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5.3 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/>.
//
//
//! A cover to go over the mains end of an SSR to make it safe to be touched.
//! The STL and assembly must be given a name and parameterless wrappers for the stl and assembly added to the project.
//
include <../core.scad>
use <../vitamins/insert.scad>
use <../vitamins/wire.scad>
use <../vitamins/ssr.scad>
use <../utils/round.scad>
wall = 1.8;
top = 1.5;
screw = M3_cap_screw;
insert = screw_insert(screw);
boss_r = insert_boss_radius(insert, wall);
counter_bore = 2;
rad = 3;
clearance = layer_height;
function ssr_shroud_pitch(type) = ssr_width(type) + 2 * wall - 2 * boss_r - eps;
function ssr_shroud_screw(type) = screw; //! Screw used to fasten
function ssr_shroud_extent(type, cable_d) = 2 * boss_r + 1 + cable_d + rad; //! How far it extends beyond the SSR
function ssr_shroud_width(type) = ssr_width(type) + 2 * wall + clearance; //! Outside width of shroud
function ssr_shroud_height(type) = ssr_height(type) + top + clearance; //! Outside height
function ssr_shroud_cable_x(type, cable_d) = -ssr_length(type) / 2 - 2 * boss_r - 1 - cable_d / 2; //! Position of cable entry holes
module ssr_shroud_hole_positions(type) //! Place children at the screw hole positions
for($side = [-1, 1])
translate([-ssr_length(type) / 2 -boss_r, $side * ssr_shroud_pitch(type) / 2])
vflip()
children();
module ssr_shroud_holes(type, cable_d) { //! Drill the screw and ziptie holes
ssr_shroud_hole_positions(type)
drill(screw_clearance_radius(screw), 0);
for(side = [-1, 1])
translate([ssr_shroud_cable_x(type, cable_d), side * (ssr_width(type) / 2 - 2 * boss_r)])
rotate(-90)
cable_tie_holes(cable_d / 2, h = 0);
}
module ssr_shroud(type, cable_d, name) { //! Generate the STL file for a specified ssr and cable
stl(str("ssr_shroud_", name));
width = ssr_shroud_width(type);
depth = ssr_length(type) / 3 + ssr_shroud_extent(type, cable_d);
height = ssr_shroud_height(type);
cable_x = ssr_shroud_cable_x(type, cable_d);
center_x = -ssr_length(type) / 6 - depth / 2;
// base and sides
translate([center_x, 0]) {
rounded_rectangle([depth - eps, width - eps, top], rad, center = false);
linear_extrude(height) difference() {
round(or = wall / 2 - eps, ir = 0) difference() {
rounded_square([depth, width], rad);
rounded_square([depth - 2 * wall, width - 2 * wall], rad - wall);
translate([depth / 2, 0])
square([2 * rad, width], center = true);
}
translate([cable_x - center_x, 0])
square([cable_d, width + 1], center = true);
}
}
// cable slots
for(side = [-1, 1])
translate([cable_x, side * (width / 2 - wall / 2), height / 2])
rotate([90, 0, 0])
linear_extrude(wall, center = true)
difference() {
square([cable_d + eps, height], center = true);
translate([0, height / 2])
vertical_tearslot(h = 0, r = cable_d / 2, l = cable_d);
}
// insert boss
ssr_shroud_hole_positions(type)
vflip()
translate_z(height)
rotate($side * 90)
insert_lug(insert, wall, counter_bore);
}
module ssr_shroud_assembly(type, cable_d, name) //! The printed parts with inserts fitted
assembly(str("SSR_shroud_", name)) {
translate_z(ssr_shroud_height(type))
vflip()
stl_colour(pp1_colour) ssr_shroud(type, cable_d, name);
ssr_shroud_hole_positions(type)
insert(insert);
}
module ssr_shroud_fastened_assembly(type, cable_d, thickness, name) //! Assembly with screws in place
{
washer = screw_washer(screw);
screw_length = screw_shorter_than(2 * washer_thickness(washer) + thickness + insert_length(insert) + counter_bore);
ssr_shroud_assembly(type, cable_d, name);
translate_z(-thickness)
ssr_shroud_hole_positions(type)
screw_and_washer(screw, screw_length, true);
for(side = [-1, 1])
translate([ssr_shroud_cable_x(type, cable_d), side * (ssr_width(type) / 2 - 2 * boss_r)]) {
rotate(-90)
cable_tie(cable_d / 2, thickness);
*translate_z(cable_d / 2)
rotate([90, 0, 0])
stl_colour(grey(20))
cylinder(d = cable_d, h = 20, center = true);
}
}