cyclone-pcb-factory/Hardware/XZ_axis/rod_gear.scad

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/* 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/teardrop.scad>
include <MCAD/involute_gears.scad>
M8_nut_diameter = 15.3;
nut_separation = 3;
/* Herringbone gear module, adapted from MCAD/involute_gears */
module herringbone_gear( teeth=12, circles=0, shaft=5 ) {
twist=200;
height=10;
pressure_angle=30;
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] )
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
);
}
// Extruder Gear
difference() {
union() {
//gear
rotate([180,0,0]) herringbone_gear( teeth=16, circles=0, shaft=8.5, $fn=40 );
//M8 hobbed bolt head fit washer
/*difference() {
translate( [0, 0, 5] ) cylinder( r=8, h=3, $fn=60 );
translate( [0, 0, 5-0.01] ) cylinder( r=M8_nut_diameter/2, h=7, $fn=6 );
}*/
/*rotate([180,0,0]) difference() {
translate( [0, 0, 5] ) cylinder( r=13, h=3, $fn=60 );
translate( [0, 0, 5+0.4] ) cylinder( r=M8_nut_diameter/2, h=7, $fn=6 );
}*/
}
translate( [0, 0, (nut_separation/2)] ) cylinder( r=M8_nut_diameter/2, h=7, $fn=6 );
}