mirror of
https://github.com/nophead/NopSCADlib.git
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240334784d
Can now: - render open loops - twist the belt - use pulleys instead of radius in the points list Fixes some precision a few places Breaking change in belt_length(); now requires a type argument
104 lines
3.8 KiB
OpenSCAD
104 lines
3.8 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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include <../core.scad>
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include <../vitamins/pulleys.scad>
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use <../vitamins/insert.scad>
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use <../utils/layout.scad>
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module belt_test() {
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p2 = [-75, -50];
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p3 = [-75, 100];
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p4 = [75, 100];
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p5 = [75 + pulley_pr(GT2x20ob_pulley) - pulley_pr(GT2x16_plain_idler), +pulley_pr(GT2x16_plain_idler)];
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p6 = [-75 + pulley_pr(GT2x20ob_pulley) + pulley_pr(GT2x16_plain_idler), -pulley_pr(GT2x16_plain_idler)];
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module pulleys(flip = false) {
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translate(p2) rotate([0, flip ? 180 : 0, 0]) pulley_assembly(GT2x20ob_pulley);
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translate(p3) pulley_assembly(GT2x20_toothed_idler);
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translate(p4) pulley_assembly(GT2x20_toothed_idler);
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translate(p5) {
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pulley = GT2x16_toothed_idler;
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screw = find_screw(hs_cs_cap, pulley_bore(pulley));
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insert = screw_insert(screw);
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hflip(flip) {
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pulley_assembly(pulley);
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translate_z(pulley_height(pulley) + pulley_offset(pulley) + screw_head_depth(screw, pulley_bore(pulley)))
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screw(screw, 20);
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translate_z(pulley_offset(pulley) - insert_length(insert))
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vflip()
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insert(insert);
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}
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}
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translate(p6) pulley_assembly(GT2x16_plain_idler);
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}
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path = [ [p5.x, p5.y, pulley_pr(GT2x16_plain_idler)],
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[p6.x, p6.y, -pulley_pr(GT2x16_plain_idler)],
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[p2.x, p2.y, pulley_pr(GT2x20ob_pulley)],
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[p3.x, p3.y, pulley_pr(GT2x20ob_pulley)],
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[p4.x, p4.y, pulley_pr(GT2x20ob_pulley)]
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];
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belt = GT2x6;
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belt(belt, path, 80, [0, 0]);
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pulleys();
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translate_z(20)
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hflip() {
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belt(belt, path, 80, [0, 0], belt_colour = grey(90), tooth_colour = grey(50));
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pulleys(flip=true);
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}
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translate([-25, 0, 10])
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layout([for(b = belts) belt_width(b)], 10)
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rotate([0, 90, 0])
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belt(belts[$i], [[0, 0, 20], [0, 1, 20]], belt_colour = $i%2==0 ? grey(90) : grey(20), tooth_colour = $i%2==0 ? grey(70) : grey(50));
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// new example with open loop - this is a simplified example of the style used for example for the BLV 3D printer
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pulley = GT2x20ob_pulley;
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idler = GT2x16_plain_idler;
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corners = [[-75,-50],[75,100]];
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carriagepos = [0,0];
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carriagew = 80;
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points = [
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[carriagepos.x - carriagew / 2, carriagepos.y, 0],
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[corners[0].x + belt_pulley_pr(belt, pulley) + belt_pulley_pr(belt, idler), carriagepos.y - belt_pulley_pr(belt, idler), idler],
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[corners[0].x, corners[0].y, pulley],
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[corners[0].x, corners[1].y, idler],
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[corners[1].x, corners[1].y, idler],
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[corners[1].x, carriagepos.y + belt_pulley_pr(belt, idler), idler],
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[carriagepos.x + carriagew / 2, carriagepos.y, 0]
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];
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translate_z(-30) {
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belt(belt, points, open=true, auto_twist=true);
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for (p = points)
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if (is_list(p.z))
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translate([p.x, p.y, 0])
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pulley_assembly(p.z);
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}
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}
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if($preview)
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belt_test();
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