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100 lines
3.0 KiB
OpenSCAD
100 lines
3.0 KiB
OpenSCAD
//
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// NopSCADlib Copyright Chris Palmer 2018
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// nop.head@gmail.com
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// hydraraptor.blogspot.com
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//
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// This file is part of NopSCADlib.
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//
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// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
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// GNU General Public License as published by the Free Software Foundation, either version 3 of
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// the License, or (at your option) any later version.
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//
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// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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// See the GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along with NopSCADlib.
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// If not, see <https://www.gnu.org/licenses/>.
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//
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//
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//! Nicodrone OpenGrab V3 electro-permananet magnet, see <https://nicadrone.com/products/epm-v3>.
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//!
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//! A permanent magnet that can be magnatized and de-magnatized electronically.
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//
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include <../core.scad>
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use <../utils/thread.scad>
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pitch = 33.8;
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width = 40;
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depth = 18;
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magnet = 4.3;
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pcb = 0.8;
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pillar = 6;
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target = 1;
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pole_w = 2;
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pole_l = 36;
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poles = 15;
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module opengrab_hole_positions() //! Position children at the screw positions
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for(x = [-1, 1], y = [-1, 1])
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translate([x * pitch / 2, y * pitch / 2, 0])
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children();
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function opengrab_width() = width; //! Module width
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function opengrab_depth() = depth; //! Module height
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function opengrab_target_thickness() = target; //! Target sheet thickness
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module opengrab() { //! Draw OpenGrab module
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vitamin("opengrab(): OpenGrab V3 electro permanent magnet");
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color("grey")
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translate_z(magnet / 2 + eps)
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cube([width, width, magnet - eps], center = true);
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color(grey80) {
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gap = (width - poles * pole_w + 3 * eps) / (poles - 1);
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pitch = pole_w + gap;
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for(i = [0 : poles - 1])
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translate([(i - floor(poles / 2)) * pitch - eps, 0, 0.5])
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cube([pole_w, pole_l, 1], center = true);
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}
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color("darkgreen")
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translate_z(depth - pillar - pcb / 2)
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cube([width, width, pcb], center = true);
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translate_z(1)
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opengrab_hole_positions() {
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color(brass)
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linear_extrude(height = depth - 1)
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difference() {
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circle(d = 4.7 / cos(30), $fn = 6);
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circle(r = 3/2);
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}
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if(show_threads)
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female_metric_thread(3, metric_coarse_pitch(3), depth - 1, center = false, colour = brass);
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}
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}
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module opengrab_target() { //! Draw OpenGrab target
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vitamin("opengrab_target(): OpenGrab silicon steel target plate");
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color(grey80)
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linear_extrude(height = target)
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difference() {
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square([width, width], center = true);
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opengrab_hole_positions()
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circle(d = 3.2);
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for(side = [-1, 1])
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translate([side * (width / 2 - 3.5), 0])
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circle(d = 4);
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}
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}
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