mirror of
https://github.com/DJSundog/NopSCADlib.git
synced 2024-12-02 11:40:02 -05:00
80 lines
2.7 KiB
OpenSCAD
80 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/>.
|
|
//
|
|
|
|
//
|
|
//! Knob with embedded hex head screw.
|
|
//
|
|
include <../core.scad>
|
|
use <../utils/hanging_hole.scad>
|
|
|
|
knob_wall = 2;
|
|
function knob_nut_trap_depth(screw) = round_to_layer(screw_head_height(screw));
|
|
knob_stem_h = 6;
|
|
knob_thickness = 4;
|
|
knob_r = 8;
|
|
knob_wave = 1;
|
|
knob_waves = 5;
|
|
knob_height = knob_stem_h + knob_thickness;
|
|
function knob_height() = knob_height;
|
|
|
|
module screw_knob(screw) { //! Generate the STL for a knob to fit the specified hex screw
|
|
stl(str("screw_knob_M", screw_radius(screw) * 20));
|
|
|
|
knob_stem_r = nut_trap_radius(screw_nut(screw)) + knob_wall;
|
|
|
|
function wave(a) = knob_r + sin(a * knob_waves) * knob_wave;
|
|
|
|
union() {
|
|
render() difference() {
|
|
cylinder(r = knob_stem_r, h = knob_thickness + knob_stem_h);
|
|
|
|
hanging_hole(knob_nut_trap_depth(screw), screw_clearance_radius(screw))
|
|
rotate(45)
|
|
circle(r = nut_trap_radius(screw_nut(screw)), $fn = 6);
|
|
}
|
|
linear_extrude(knob_thickness, convexity = 3)
|
|
difference() {
|
|
polygon(points = [for(a = [0 : 359]) [wave(a) * sin(a), wave(a) * cos(a)]]);
|
|
|
|
circle(knob_stem_r - eps);
|
|
}
|
|
}
|
|
}
|
|
|
|
//! Place the screw through the printed part
|
|
module screw_knob_assembly(screw, length) //! Assembly with the screw in place
|
|
assembly(str("screw_knob_M", 20 * screw_radius(screw), "_", length)) {
|
|
translate_z(knob_height)
|
|
vflip()
|
|
color(pp1_colour) screw_knob(screw);
|
|
|
|
translate_z(knob_height - knob_nut_trap_depth(screw))
|
|
rotate(-45)
|
|
screw(screw, length);
|
|
}
|
|
|
|
module screw_knob_M30_stl() screw_knob(M3_hex_screw);
|
|
module screw_knob_M40_stl() screw_knob(M4_hex_screw);
|
|
|
|
//! * Press the M3 x 16 hex screw into the knob
|
|
module screw_knob_M30_16_assembly() screw_knob_assembly(M3_hex_screw, 16);
|
|
|
|
//! * Press the M4 x 16 hex screw into the knob
|
|
module screw_knob_M40_16_assembly() screw_knob_assembly(M4_hex_screw, 16);
|