NopSCADlib/printed/handle.scad

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//
// 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/>.
//
//
//! Printed handle that can be printed without needing support material due to its truncated teardrop profile.
//
include <../core.scad>
use <../vitamins/insert.scad>
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dia = 18;
length = 90; // inside length
height = 30; // inside height
screw = M4_cap_screw;
insert = screw_insert(screw);
pitch = length + dia;
function handle_length() = pitch + dia; //! Outside length
function handle_width() = dia; //! The width, i.e. diameter
function handle_height() = height + dia; //! Total height
function handle_screw() = screw; //! The screw type
module handle_screw_positions() //! Position children at the screw positions
for(end = [-1, 1])
translate([end * pitch / 2, 0])
children();
module handle_holes(h = 100) //! Drills holes for the screws
handle_screw_positions()
drill(screw_clearance_radius(screw), h);
module handle_stl() { //! generate the STL
module end(end)
translate([end * pitch / 2, 0])
rotate_extrude()
intersection() {
rotate(180)
teardrop(r = dia / 2, h = 0);
translate([0, - (dia + 1) / 2])
square([dia / 2 + 1, dia + 1]);
}
stl("handle")
translate_z(dia / 2)
union() {
hull() {
end(-1);
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end(1);
}
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handle_screw_positions()
render() difference() {
h = height + dia / 2;
cylinder(d = dia, h = h);
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translate_z(h)
insert_hole(insert, 6);
}
}
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}
//
//! Place inserts in the bottom of the posts and push them home with a soldering iron with a conical bit heated to 200&deg;C.
//
module handle_assembly() pose([225, 0, 150], [0, 0, 14]) //! Printed part with inserts in place
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assembly("handle", ngb = true) {
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translate_z(handle_height())
stl_colour(pp1_colour) vflip() handle_stl();
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handle_screw_positions()
vflip()
insert(insert);
}
module handle_fastened_assembly(thickness) { //! Assembly with fasteners in place
screw_length = screw_length(screw, thickness, 2, true, longer = true);
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handle_assembly();
handle_screw_positions()
vflip()
translate_z(thickness)
screw_and_washer(screw, screw_length, true);
}