203 lines
7.3 KiB
OpenSCAD
203 lines
7.3 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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//! J-Head hot ends from Brian Reifsnider, hotends.com.
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//
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include <../core.scad>
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include <hot_ends.scad>
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include <components.scad>
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include <tubings.scad>
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include <zipties.scad>
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use <wire.scad>
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use <../utils/tube.scad>
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MK4_heater = [ 12.76, 15.88, 8.22, (15.88 / 2 - 4.5), (12.76 / 2 - 0.5 - 2.5 / 2), (-15.88 / 2 + 5), 9.5, 3];
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MK5_heater = [ 12.76, 12.76, 8.22, (12.76 / 2 - 3.75), (12.76 / 2 - 0.5 - 2.5 / 2), (-12.76 / 2 + 4), 8, 2];
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function heater_width(type) = type[0];
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function heater_length(type) = type[1];
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function heater_height(type) = type[2];
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function resistor_x(type) = type[3];
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function thermistor_y(type) = type[4];
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function nozzle_x(type) = type[5];
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function nozzle_cone(type) = type[6];
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function nozzle_cone_length(type) = type[7];
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barrel_tap_dia = 5;
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barrel_dia = 6;
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insulator_dia = 12;
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module heater_block(type, resistor, thermistor) {
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h = heater_height(type);
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color(brass) {
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render() difference() {
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rotate([90, 0, 0])
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linear_extrude(height = heater_width(type), center = true) difference() {
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square([heater_length(type), h], center = true);
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translate([resistor_x(type), 0])
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circle(resistor_hole(resistor) / 2);
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}
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translate([-heater_length(type) / 2, thermistor_y(type), 0]) // hole for thermistor
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rotate([0, 90, 0])
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cylinder(r = resistor_hole(thermistor) / 2, h = 2 * resistor_length(thermistor), center = true);
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}
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//
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// nozzle
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//
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cone_length = nozzle_cone_length(type);
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cone_end_r = 1 / 2;
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cone_start_r = nozzle_cone(type) / 2;
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straight = 1;
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nozzle_r = 0.4 / 2;
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translate_z(-h / 2) vflip()
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rotate_extrude()
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polygon([
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[nozzle_r, 0],
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[cone_start_r, 0],
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[cone_start_r, straight],
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[cone_end_r, straight + cone_length],
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[nozzle_r, straight + cone_length],
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]);
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}
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}
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module jhead_hot_end(type, filament) {
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resistor = RIE1212UB5C5R6;
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thermistor = Epcos;
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heater = type == JHeadMk4 ? MK4_heater : MK5_heater;
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insulator_length = hot_end_insulator_length(type);
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inset = hot_end_inset(type);
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length = hot_end_total_length(type);
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barrel_length = length - insulator_length;
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vitamin(str("jhead_hot_end(", type[0], ", ", filament, "): Hot end ", hot_end_part(type), " ", filament, "mm"));
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//
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// insulator
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//
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translate_z(inset - insulator_length)
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color(hot_end_insulator_colour(type)) rotate_extrude()
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difference() {
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chamfer = 2;
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hull() {
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translate([0, chamfer])
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square([hot_end_insulator_diameter(type) / 2, insulator_length - chamfer]);
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square([hot_end_insulator_diameter(type) / 2 - chamfer, insulator_length]);
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}
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square([3.2 / 2, insulator_length]);
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translate([hot_end_groove_dia(type) / 2, insulator_length - hot_end_inset(type) - hot_end_groove(type)])
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square([100, hot_end_groove(type)]);
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}
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//
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// heater block
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//
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rotate(90)
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translate([-nozzle_x(heater), 0, inset - insulator_length - heater_height(heater) / 2])
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heater_block(heater, resistor, thermistor);
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}
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module jhead_hot_end_assembly(type, filament, naked = false) { //! Assembly with resistor, thermistor, tape, sleaving and ziptie
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resistor = RIE1212UB5C5R6;
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thermistor = Epcos;
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heater = type == JHeadMk4 ? MK4_heater : MK5_heater;
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insulator_length = hot_end_insulator_length(type);
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inset = hot_end_inset(type);
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length = hot_end_total_length(type);
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barrel_length = length - insulator_length;
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bundle = 3.2;
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tape_width = 25;
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tape_overlap = 10;
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tape_thickness = 0.8;
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jhead_hot_end(type, filament);
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vitamin(": Tape self amalgamating silicone 110mm x 25mm");
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//
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// silcone tape
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//
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if(!naked)
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color("red")
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if(exploded())
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translate([0, max(hot_end_insulator_diameter(type) / 2, heater_length(heater) / 2 - nozzle_x(heater)),
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-tape_width + tape_overlap + inset - insulator_length])
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cube([110, tape_thickness, tape_width]);
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else
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hull() {
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translate_z(+ inset - insulator_length)
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cylinder(r = hot_end_insulator_diameter(type) / 2 + 2 * tape_thickness, h = tape_overlap);
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translate([0, -nozzle_x(heater), inset - insulator_length - heater_height(heater) / 2 + eps])
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cube([heater_width(heater) + 4 * tape_thickness,
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heater_length(heater) + 4 * tape_thickness, heater_height(heater)], center = true);
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}
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//
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// Zip tie and heatshrink
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//
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if(!naked)
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rotate(10) {
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dia = hot_end_insulator_diameter(type);
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scale([1, (bundle + dia) / dia])
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translate([0, -bundle / 2, -7])
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rotate(-110)
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ziptie(small_ziptie, dia / 2);
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translate([0, -dia / 2 - bundle / 2, 20])
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scale([0.7, bundle / 6.4])
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difference() {
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tubing(HSHRNK64, 60);
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if(!exploded())
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translate_z(20)
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cube([10, 10, 60], center = true);
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}
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}
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wire("Red PTFE", 16, 170);
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wire("Red PTFE", 16, 170);
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//
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// heater block
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//
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rotate(90)
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translate([-nozzle_x(heater), 0, inset - insulator_length - heater_height(heater) / 2]) {
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intersection() {
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group() {
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translate([resistor_x(heater), -exploded() * 15, 0])
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rotate([90, 0, 0])
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sleeved_resistor(resistor, PTFE20, bare = -10);
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translate([-heater_length(heater) / 2 + resistor_length(thermistor) / 2 - exploded() * 10, thermistor_y(heater), 0])
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rotate([90, 0, -90])
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sleeved_resistor(thermistor, PTFE07, heatshrink = HSHRNK16);
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}
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if(!exploded())
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if(naked)
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color("grey") cylinder(r = 12, h = 100, center = true);
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else
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cube(1, true); // hide the wires when not exploded
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}
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}
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}
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