From 96c265816ce870949c589a27b392b9987f978690 Mon Sep 17 00:00:00 2001
From: Arne Durr <D-Byte@users.noreply.github.com>
Date: Sun, 30 Nov 2014 21:01:05 +0100
Subject: [PATCH] Add support for rendering gears

Used a modified file from the inherited_files/XYgears folder
---
 .../CYCLONE_2/Source_files/libs/gears.scad    | 79 +++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 Hardware/CYCLONE_2/Source_files/libs/gears.scad

diff --git a/Hardware/CYCLONE_2/Source_files/libs/gears.scad b/Hardware/CYCLONE_2/Source_files/libs/gears.scad
new file mode 100644
index 0000000..b3fa0e4
--- /dev/null
+++ b/Hardware/CYCLONE_2/Source_files/libs/gears.scad
@@ -0,0 +1,79 @@
+/* Derived by Carlosgs from:
+ * http://www.thingiverse.com/thing:12789
+ * An extruder gear set for the TechZone Huxley,
+ *	featuring Herringbone teeth.
+ * You will have to recalibrate your E_STEPS_PER_MM in
+ *	your firmware (ratio changing from original techzone
+ *	lasercut gears).
+ * This use 2 modules from the MCAD library that you can
+ *	get from https://github.com/elmom/MCAD.
+ * 
+ * Part - the motor gear mount hub with set screw hole -
+ *	derived from http://www.thingiverse.com/thing:3104
+ *	(thanks GilesBathgate) which is under GPL CC license.
+ *
+ * Copyright (C) 2011	Guy 'DeuxVis' P.
+ *
+ * This program 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 2
+ * of the License, or (at your option) any later version.
+ * 
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA	02110-1301, USA.
+ * -- 
+ *		 DeuxVis - device@ymail.com */
+
+include <MCAD/involute_gears.scad>
+
+// Increase the resolution of default shapes
+$fa = 5; // Minimum angle for fragments [degrees]
+$fs = 0.5; // Minimum fragment size [mm]
+
+/* Herringbone gear module, adapted from MCAD/involute_gears */
+module herringbone_gear( teeth=12, circles=0, shaft=5 ) {
+	twist=0;//100;
+	height=10;
+	pressure_angle=30;
+
+	diam = teeth*2;
+	
+	truncation_length = 2.8;
+	truncation_height = height/2.5;
+
+	module myGear() {
+		difference() {
+			gear(
+				number_of_teeth=teeth,
+				circular_pitch=320,
+				pressure_angle=pressure_angle,
+				clearance = 0.2,
+				gear_thickness = height/2,
+				rim_thickness = height/2,
+				rim_width = 1,
+				hub_thickness = height/2,
+				hub_diameter=1,
+				bore_diameter=shaft,
+				circles=circles,
+				twist=twist/teeth
+			);
+			mirror([0,0,1]) translate([0,0,-height/2-0.01]) {
+				difference() {
+					cylinder(r=diam/2, h=truncation_height);
+					translate([0,0,-0.01])
+						cylinder(r1=diam/2-truncation_length, r2=diam/2+1, h=truncation_height+0.02);
+				}
+			}
+		}
+	}
+	
+	myGear();
+	mirror( [0,0,1] )
+		myGear();
+}