NopSCADlib/vitamins/jhead.scad

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