From 64f75f21a7c9b146edebfc4f539266be8e48d308 Mon Sep 17 00:00:00 2001
From: Simon Brooke <simon@journeyman.cc>
Date: Fri, 5 Sep 2025 18:20:59 +0100
Subject: [PATCH] Added the new model files!

---
 model/chainset.scad        | 77 ++++++++++++++++++++++++++++++++++++++
 model/library/look-keo.svg | 42 +++++++++++++++++++++
 model/pedal.scad           | 16 ++++++++
 3 files changed, 135 insertions(+)
 create mode 100644 model/chainset.scad
 create mode 100644 model/library/look-keo.svg
 create mode 100644 model/pedal.scad

diff --git a/model/chainset.scad b/model/chainset.scad
new file mode 100644
index 0000000..62580ba
--- /dev/null
+++ b/model/chainset.scad
@@ -0,0 +1,77 @@
+// chainset.scad
+
+// (c) Simon Brooke 2025; CC-BY-SA
+// Derived from Hampus Andersson's Sprocket Generator
+
+
+include <SprocketGenerator2/files/Sprocket_Generator_v2_example_10.scad>
+
+include <pedal.scad>
+
+include <BOSL2/std.scad>
+
+function sprocket_radius(teeth=52, roller=7.9, pitch=12.7) = let(roller_radius = roller/2,
+                radius = pitch/(2*sin(180/teeth)))
+                sqrt((radius*radius) - (pitch*(roller_radius+tolerance))+((roller_radius+tolerance)*(roller_radius+tolerance)));
+	
+
+module chainring( teeth=52, roller=7.9, pitch=12.7) {
+    radius = sprocket_radius(teeth=teeth, roller=roller, pitch=pitch);
+    
+    echo( "Radius=", radius, "mm");
+
+    difference() {
+        color("grey")
+        sprocket( teeth=teeth, roller=roller, pitch=pitch);
+        
+        translate([0, 0, -10])
+        cylinder(h=20, r=radius*.75);
+    }
+}
+
+module spider(radius, arms) {
+    for(i=[0:1:5])
+        rotate([0,90,i*(360/5)])
+            color("grey")
+            prismoid(size1=[7, radius/5], size2=[5, radius/7], height=radius*.9);
+}
+
+
+module chainset(teeth=53, arms=5, crank=172, bbshell=68) {
+    radius = sprocket_radius(teeth=teeth);
+    
+    chainring(teeth=teeth);
+    spider(radius*.9, 5);
+    
+    // cranks
+    rotate([0, 90, 0])
+    translate([6, 0, -10])
+    color("grey")
+    prismoid(size1=[10, 25], size2=[7, 18], h=crank+20);
+ 
+    rotate([0, 90, 180])
+    translate([0 - (12+bbshell), 0, -10])
+    color("grey")
+    prismoid(size1=[10, 25], size2=[7, 18], h=crank +20);
+    
+    // pedals
+    translate([0-crank, 0, 20 + bbshell])
+        pedal();
+    translate([crank, 0, 0-4])
+        mirror([0, 0, 1])
+        pedal();
+    
+    translate([0, 0, 5])
+    color("black")
+    cylinder(h=bbshell, r=17);
+    
+    translate([0, 0, -5])
+    color("black")
+    cylinder(h= bbshell+20, r=6);
+    
+}
+
+// chainring();
+// spider(90, 1);
+
+chainset(teeth=82, crank=140);
\ No newline at end of file
diff --git a/model/library/look-keo.svg b/model/library/look-keo.svg
new file mode 100644
index 0000000..8d5c73f
--- /dev/null
+++ b/model/library/look-keo.svg
@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="210mm"
+   height="297mm"
+   viewBox="0 0 210 297"
+   version="1.1"
+   id="svg1"
+   xml:space="preserve"
+   inkscape:version="1.4 (e7c3feb100, 2024-10-09)"
+   sodipodi:docname="look-keo.svg"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg"><sodipodi:namedview
+     id="namedview1"
+     pagecolor="#ffffff"
+     bordercolor="#000000"
+     borderopacity="0.25"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
+     inkscape:document-units="mm"
+     inkscape:zoom="1.1216818"
+     inkscape:cx="245.61333"
+     inkscape:cy="524.65859"
+     inkscape:window-width="2256"
+     inkscape:window-height="1423"
+     inkscape:window-x="0"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="layer1" /><defs
+     id="defs1" /><g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"><path
+       style="fill:#000000"
+       d="m 120.69386,228.45144 c -0.0761,-0.095 -0.79261,-0.42247 -1.26554,-1.04952 -9.62131,-12.75683 -33.154257,-5.14672 -40.908601,-13.8177 -5.945601,-9.75361 -6.096818,-28.97023 -7.49811,-40.36248 -0.423826,-3.44459 -1.62778,-12.20202 -1.95586,-13.74745 -0.194,-0.91382 -1.29048,-1.67354 -2.12735,-1.474 -0.34314,0.0818 -1.52347,-43.24437 -0.59354,-43.14917 1.62952,0.1668 1.71107,0.14448 2.25074,-0.61604 3.554077,-5.00857 14.150775,-51.348637 16.46043,-55.012344 2.85039,-4.52145 9.28824,-10.830036 15.919271,-15.599634 3.98164,-2.863938 8.76461,-5.585353 10.12612,-5.761567 0.39887,-0.05163 10.80316,-1.275826 30.4038,-0.429223 5.80172,0.0264 8.3442,0.868908 13.18812,3.856094 4.51076,2.874865 13.00167,10.546677 16.00089,14.45733 6.58177,8.581924 11.55888,47.790724 18.28256,56.846864 13.66207,18.40148 10.17581,20.50294 4.22287,32.62423 0,0.18301 -0.35001,0.66309 -0.77779,1.06685 -1.72885,1.63175 -2.47654,3.6689 -3.35769,9.12216 -2.66603,16.49954 -5.63705,36.04957 -7.56679,52.70296 -0.23353,2.01533 -0.36519,4.40484 -1.29806,5.46733 -0.99134,1.12907 -1.59325,1.33123 -7.56295,2.54015 -8.0495,2.83844 -24.63958,0.79427 -29.06113,8.32291 -0.67791,1.3431 -3.86013,4.13521 -5.77495,5.06701 -6.68985,3.25545 -14.68052,1.22444 -17.10644,-1.05476 z m 38.90928,-124.39415 c 0.2278,-0.21012 -0.009,-0.70593 0.15396,-0.90244 0.21105,-0.25429 0.2053,-1.45502 -0.0199,-4.165494 -0.43243,-12.73786 0.28691,-28.716002 -7.02684,-39.49635 -5.01355,-5.617497 -16.00873,-6.191253 -24.4214,-7.185857 -7.30944,-0.405206 -23.67811,3.641785 -26.23022,9.197077 -4.986691,10.854737 -9.09714,38.281659 -6.274401,40.686524 l 14.997501,12.77729 h 36.99215 z"
+       id="path1"
+       sodipodi:nodetypes="sssssssssssssssssssssssssccssssccs" /></g></svg>
diff --git a/model/pedal.scad b/model/pedal.scad
new file mode 100644
index 0000000..c0d0902
--- /dev/null
+++ b/model/pedal.scad
@@ -0,0 +1,16 @@
+// pedal.scad
+
+// (c) Simon Brooke 2025; CC-BY-SA
+
+
+module pedal(){
+    rotate([0, 270, 0])
+    scale([.6, .6, .6])
+    translate([-50, -160, 0])
+    linear_extrude(height = 10, center = true)
+        // color("black")
+        import("library/look-keo.svg");
+    cylinder(h=80, r=6);
+    }
+    
+// pedal();
\ No newline at end of file