mirror of
https://github.com/DJSundog/NopSCADlib.git
synced 2024-11-27 09:10:02 -05:00
287 lines
11 KiB
OpenSCAD
287 lines
11 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/>.
|
|
//
|
|
|
|
//
|
|
//! Machine screws and wood screws with various head styles.
|
|
//
|
|
include <../utils/core/core.scad>
|
|
|
|
use <washer.scad>
|
|
use <nut.scad>
|
|
use <../utils/rounded_cylinder.scad>
|
|
use <../utils/thread.scad>
|
|
include <inserts.scad>
|
|
|
|
function screw_head_type(type) = type[2]; //! Head style hs_cap, hs_pan, hs_cs, hs_hex, hs_grub, hs_cs_cap, hs_dome
|
|
function screw_radius(type) = type[3] / 2; //! Nominal radius
|
|
function screw_head_radius(type) = type[4] / 2; //! Head radius
|
|
function screw_head_height(type) = type[5]; //! Head height
|
|
function screw_socket_depth(type) = type[6]; //! Socket or slot depth
|
|
function screw_socket_af(type) = type[7]; //! Socket across flats
|
|
function screw_max_thread(type) = type[8]; //! Maximum thread length
|
|
function screw_washer(type) = type[9]; //! Default washer
|
|
function screw_nut(type) = type[10]; //! Default nut
|
|
function screw_pilot_hole(type) = type[11]; //! Pilot hole radius for wood screws, tap radius for machine screws
|
|
function screw_clearance_radius(type) = type[12]; //! Clearance hole radius
|
|
function screw_nut_radius(type) = screw_nut(type) ? nut_radius(screw_nut(type)) : 0; //! Radius of matching nut
|
|
function screw_boss_diameter(type) = max(washer_diameter(screw_washer(type)) + 1, 2 * (screw_nut_radius(type) + 3 * extrusion_width)); //! Boss big enough for nut trap and washer
|
|
function screw_head_depth(type, d) = screw_head_height(type) ? 0 : screw_head_radius(type) - d / 2; //! How far a counter sink head will go into a straight hole diameter d
|
|
|
|
function screw_longer_than(x) = x <= 5 ? 5 : //! Returns shortest screw length longer or equal to x
|
|
x <= 8 ? 8 :
|
|
x <= 10 ? 10 :
|
|
x <= 12 ? 12 :
|
|
x <= 16 ? 16 :
|
|
ceil(x / 5) * 5;
|
|
|
|
function screw_shorter_than(x) = x >= 20 ? floor(x / 5) * 5 : //! Returns longest screw length shorter than or equal to x
|
|
x >= 16 ? 16 :
|
|
x >= 12 ? 12 :
|
|
x >= 10 ? 10 :
|
|
x >= 8 ? 8 :
|
|
x >= 6 ? 6 :
|
|
5;
|
|
|
|
function screw_smaller_than(d) = d >= 2.5 && d < 3 ? 2.5 : floor(d); // Largest diameter screw less than or equal to specified diameter
|
|
|
|
function screw_insert(screw, i = 0) = let(d = screw_radius(screw) * 2)
|
|
i >= len(inserts) ? undef
|
|
: insert_screw_diameter(inserts[i]) == d ? inserts[i]
|
|
: screw_insert(screw, i + 1);
|
|
|
|
module screw(type, length, hob_point = 0, nylon = false) { //! Draw specified screw, optionally hobbed or nylon
|
|
description = str("Screw ", nylon ? "Nylon " : "", type[1], length < 10 ? " x " : " x ", length, "mm", hob_point ? str(", hobbed at ", hob_point) : "");
|
|
vitamin(str("screw(", type[0], "_screw, ", length, arg(hob_point, 0, "hob_point"), arg(nylon, false, "nylon"), "): ", description));
|
|
|
|
head_type = screw_head_type(type);
|
|
rad = screw_radius(type) - eps;
|
|
head_rad = screw_head_radius(type);
|
|
head_height = screw_head_height(type);
|
|
socket_af = screw_socket_af(type);
|
|
socket_depth= screw_socket_depth(type);
|
|
socket_rad = socket_af / cos(30) / 2;
|
|
max_thread = screw_max_thread(type);
|
|
thread = max_thread ? length >= max_thread + 5 ? max_thread
|
|
: length
|
|
: length;
|
|
d = 2 * screw_radius(type);
|
|
pitch = metric_coarse_pitch(d);
|
|
colour = nylon || head_type == hs_grub ? grey40 : grey80;
|
|
|
|
module shaft(socket = 0, headless = false) {
|
|
point = screw_nut(type) ? 0 : 3 * rad;
|
|
shank = length - thread - socket;
|
|
|
|
if(show_threads && !point && pitch)
|
|
translate_z(-length)
|
|
male_metric_thread(d, pitch, thread - (shank > 0 || headless ? 0 : socket), false, top = headless ? -1 : 0, solid = !headless, colour = colour);
|
|
else
|
|
color(colour * 0.9)
|
|
rotate_extrude() {
|
|
translate([0, -length + point])
|
|
square([rad, length - socket - point]);
|
|
|
|
if(point)
|
|
polygon([
|
|
[0.4, -length], [0, point - length], [rad, point - length]
|
|
]);
|
|
}
|
|
|
|
if(shank > 0)
|
|
color(colour)
|
|
translate_z(-shank - socket)
|
|
cylinder(r = rad + eps, h = shank);
|
|
}
|
|
|
|
explode(length + 10) {
|
|
if(head_type == hs_cap) {
|
|
color(colour) {
|
|
cylinder(r = head_rad, h = head_height - socket_depth);
|
|
|
|
translate_z(head_height - socket_depth)
|
|
linear_extrude(socket_depth)
|
|
difference() {
|
|
circle(head_rad);
|
|
|
|
circle(socket_rad, $fn = 6);
|
|
}
|
|
|
|
}
|
|
shaft();
|
|
}
|
|
if(head_type == hs_grub) {
|
|
color(colour) {
|
|
r = show_threads ? rad - pitch / 2 : rad;
|
|
translate_z(-socket_depth)
|
|
linear_extrude(socket_depth)
|
|
difference() {
|
|
circle(r);
|
|
|
|
circle(socket_rad, $fn = 6);
|
|
}
|
|
|
|
shaft(socket_depth, true);
|
|
|
|
if(show_threads)
|
|
translate_z(-length)
|
|
cylinder(r = r, h = length - socket_depth);
|
|
}
|
|
}
|
|
if(head_type == hs_hex) {
|
|
color(colour)
|
|
cylinder(r = head_rad, h = head_height, $fn = 6);
|
|
|
|
shaft();
|
|
}
|
|
if(head_type == hs_pan) {
|
|
socket_rad = 0.6 * head_rad;
|
|
socket_depth = 0.5 * head_height;
|
|
socket_width = 1;
|
|
color(colour) {
|
|
rotate_extrude()
|
|
difference() {
|
|
rounded_corner(r = head_rad, h = head_height, r2 = head_height / 2);
|
|
|
|
translate([0, head_height - socket_depth])
|
|
square([socket_rad, 10]);
|
|
}
|
|
|
|
linear_extrude(head_height)
|
|
difference() {
|
|
circle(socket_rad + eps);
|
|
|
|
square([2 * socket_rad, socket_width], center = true);
|
|
square([socket_width, 2 * socket_rad], center = true);
|
|
}
|
|
}
|
|
shaft();
|
|
}
|
|
|
|
if(head_type == hs_dome) {
|
|
lift = 0.38;
|
|
color(colour) {
|
|
rotate_extrude() {
|
|
difference() {
|
|
intersection() {
|
|
translate([0, -head_height + lift])
|
|
circle(2 * head_height);
|
|
|
|
square([head_rad, head_height]);
|
|
}
|
|
translate([0, head_height - socket_depth])
|
|
square([socket_rad, 10]);
|
|
}
|
|
}
|
|
linear_extrude(head_height)
|
|
difference() {
|
|
circle(socket_rad + eps);
|
|
circle(socket_rad, $fn = 6);
|
|
}
|
|
}
|
|
shaft();
|
|
}
|
|
|
|
if(head_type == hs_cs) {
|
|
head_height = head_rad;
|
|
socket_rad = 0.6 * head_rad;
|
|
socket_depth = 0.3 * head_rad;
|
|
socket_width = 1;
|
|
color(colour) {
|
|
rotate_extrude()
|
|
difference() {
|
|
polygon([[0, 0], [head_rad, 0], [0, -head_height]]);
|
|
|
|
translate([0, -socket_depth + eps])
|
|
square([socket_rad + 0.1, 10]);
|
|
}
|
|
|
|
translate_z(-socket_depth)
|
|
linear_extrude(socket_depth)
|
|
difference() {
|
|
circle(socket_rad + 0.1);
|
|
|
|
square([2 * socket_rad, socket_width], center = true);
|
|
square([socket_width, 2 * socket_rad], center = true);
|
|
}
|
|
}
|
|
shaft(socket_depth);
|
|
}
|
|
|
|
if(head_type == hs_cs_cap) {
|
|
head_height = head_rad;
|
|
color(colour) {
|
|
rotate_extrude()
|
|
difference() {
|
|
polygon([[0, 0], [head_rad, 0], [0, -head_height]]);
|
|
|
|
translate([0, -socket_depth + eps])
|
|
square([socket_rad, 10]);
|
|
}
|
|
|
|
translate_z(-socket_depth)
|
|
linear_extrude(socket_depth)
|
|
difference() {
|
|
circle(socket_rad + 0.1);
|
|
|
|
circle(socket_rad, $fn = 6);
|
|
}
|
|
}
|
|
shaft(socket_depth);
|
|
}
|
|
}
|
|
}
|
|
|
|
module screw_countersink(type) { //! Countersink shape
|
|
head_type = screw_head_type(type);
|
|
head_rad = screw_head_radius(type);
|
|
head_height = head_rad;
|
|
|
|
if(head_type == hs_cs || head_type == hs_cs_cap)
|
|
translate_z(-head_height)
|
|
cylinder(h = head_height, r1 = 0, r2 = head_rad);
|
|
}
|
|
|
|
module screw_and_washer(type, length, star = false, penny = false) { //! Screw with a washer which can be standard or penny and an optional star washer on top
|
|
washer = screw_washer(type);
|
|
head_type = screw_head_type(type);
|
|
|
|
if(head_type != hs_cs && head_type != hs_cs_cap) {
|
|
translate_z(exploded() * 6)
|
|
if(penny)
|
|
penny_washer(washer);
|
|
else
|
|
washer(washer);
|
|
|
|
translate_z(washer_thickness(washer)) {
|
|
if(star) {
|
|
translate_z(exploded() * 8)
|
|
star_washer(washer);
|
|
|
|
translate_z(washer_thickness(washer))
|
|
screw(type, length);
|
|
}
|
|
else
|
|
screw(type, length);
|
|
}
|
|
}
|
|
else
|
|
translate_z(eps)
|
|
screw(type, length);
|
|
}
|