From 166ed05d4a4b0273ac25bbb308f7d42beadcc7dd Mon Sep 17 00:00:00 2001
From: Martin Budden <mjbudden@gmail.com>
Date: Fri, 13 Nov 2020 10:21:38 +0000
Subject: [PATCH] Add optional bowden connector to E3D hotends.

---
 tests/hot_ends.scad   |  2 +-
 vitamins/e3d.scad     | 39 ++++++++++++++++++++++++++++++++++++---
 vitamins/hot_end.scad |  4 ++--
 3 files changed, 39 insertions(+), 6 deletions(-)

diff --git a/tests/hot_ends.scad b/tests/hot_ends.scad
index cf6a5ca..a7a202e 100644
--- a/tests/hot_ends.scad
+++ b/tests/hot_ends.scad
@@ -25,7 +25,7 @@ module hot_ends()
     layout([for(h = hot_ends) 40])
         translate([-20, 0])
             rotate(90)
-                hot_end(hot_ends[$i], 3);
+                hot_end(hot_ends[$i], 3, bowden = $i == 3);
 
 if($preview)
     hot_ends();
diff --git a/vitamins/e3d.scad b/vitamins/e3d.scad
index 4bb338a..040b1ca 100644
--- a/vitamins/e3d.scad
+++ b/vitamins/e3d.scad
@@ -26,6 +26,8 @@ include <tubings.scad>
 include <zipties.scad>
 include <fans.scad>
 
+use <../utils/rounded_cylinder.scad>
+use <../utils/thread.scad>
 use <../utils/tube.scad>
 
 rad_dia = 22; // Diam of the part with ailettes
@@ -94,7 +96,34 @@ module heater_block(type, naked = false, resistor_wire_rotate = [0,0,0]) {
     }
 }
 
+module bowden_connector(cap_colour = grey(20)) {
+    ir = 4.25 / 2;
+    body_colour = "silver";
 
+    color(body_colour) {
+        translate_z(-4.5) {
+            tube(or = 2.5, ir = ir, h = 4.5, center = false);
+            male_metric_thread(6, metric_coarse_pitch(5), length = 4.5, center = false, solid = false, colour = body_colour);
+        }
+        tube(or = 7.7 / 2, ir = ir, h = 2, center = false);
+        translate_z(2)
+            linear_extrude(6.5)
+                difference() {
+                    circle(d = 11.55, $fn = 6);
+                    circle(r = ir);
+                }
+        translate_z(8.5)
+            rounded_cylinder(r = 9.8 / 2, h = 2, r2 = 1.5, ir = ir);
+        translate_z(10.5)
+            tube(or = 3.5, ir = ir, h = 0.5, center = false);
+    }
+    color(cap_colour) {
+        translate_z(11)
+            tube(or = 3, ir = ir, h = 1, center = false);
+        translate_z(12)
+            tube(or = 5.5, ir = ir, h = 1.75, center = false);
+    }
+}
 
 module e3d_fan_duct(type) {
     color("DeepSkyBlue")
@@ -123,7 +152,7 @@ module e3d_fan(type) {
                 fan(fan30x10);
 }
 
-module e3d_hot_end(type, filament, naked = false, resistor_wire_rotate = [0,0,0]) {
+module e3d_hot_end(type, filament, naked = false, resistor_wire_rotate = [0,0,0], bowden = false) {
     insulator_length = hot_end_insulator_length(type);
     inset = hot_end_inset(type);
     h_ailettes = rad_len / (2 * rad_nb_ailettes - 1);
@@ -150,6 +179,10 @@ module e3d_hot_end(type, filament, naked = false, resistor_wire_rotate = [0,0,0]
                         square([100, hot_end_groove(type)]);
             }
 
+    if(bowden)
+        translate_z(inset)
+            bowden_connector();
+
     rotate(90)
         heater_block(type, naked, resistor_wire_rotate);
 
@@ -158,10 +191,10 @@ module e3d_hot_end(type, filament, naked = false, resistor_wire_rotate = [0,0,0]
             e3d_fan();
 }
 
-module e3d_hot_end_assembly(type, filament, naked = false, resistor_wire_rotate = [0,0,0]) {
+module e3d_hot_end_assembly(type, filament, naked = false, resistor_wire_rotate = [0,0,0], bowden = false) {
     bundle = 3.2;
 
-    e3d_hot_end(type, filament, naked, resistor_wire_rotate);
+    e3d_hot_end(type, filament, naked, resistor_wire_rotate, bowden);
 
     // Wire and ziptie
     if(!naked)
diff --git a/vitamins/hot_end.scad b/vitamins/hot_end.scad
index 16e2f5e..1d5c79c 100644
--- a/vitamins/hot_end.scad
+++ b/vitamins/hot_end.scad
@@ -44,10 +44,10 @@ function hot_end_length(type) = hot_end_total_length(type) - hot_end_inset(type)
 use <jhead.scad>
 use <e3d.scad>
 
-module hot_end(type, filament, naked = false, resistor_wire_rotate = [0,0,0]) { //! Draw specified hot end
+module hot_end(type, filament, naked = false, resistor_wire_rotate = [0,0,0], bowden = false) { //! Draw specified hot end
     if(hot_end_style(type) == jhead)
         jhead_hot_end_assembly(type, filament, naked);
 
     if(hot_end_style(type) == e3d)
-        e3d_hot_end_assembly(type, filament, naked, resistor_wire_rotate);
+        e3d_hot_end_assembly(type, filament, naked, resistor_wire_rotate, bowden);
 }