115 lines
3.3 KiB
OpenSCAD
115 lines
3.3 KiB
OpenSCAD
/* Derived by Carlosgs from:
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* http://www.thingiverse.com/thing:12789
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* An extruder gear set for the TechZone Huxley,
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* featuring Herringbone teeth.
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* You will have to recalibrate your E_STEPS_PER_MM in
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* your firmware (ratio changing from original techzone
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* lasercut gears).
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* This use 2 modules from the MCAD library that you can
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* get from https://github.com/elmom/MCAD.
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*
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* Part - the motor gear mount hub with set screw hole -
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* derived from http://www.thingiverse.com/thing:3104
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* (thanks GilesBathgate) which is under GPL CC license.
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*
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* August 2013 added 2 extra setscrews to ensure centered usage.
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* by Harry Binnema.
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*
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* Copyright (C) 2011 Guy 'DeuxVis' P.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* --
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* DeuxVis - device@ymail.com */
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include <MCAD/teardrop.scad>
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include <MCAD/involute_gears.scad>
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motor_shaft_diameter=5.4;
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pos=15.4; //position hole for grubnut
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nholes = 7;
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shaft_diam=10;
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shaft_height=7;
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/* Herringbone gear module, adapted from MCAD/involute_gears */
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module herringbone_gear( teeth=12, circles=0, shaft=5 ) {
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twist=200;
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height=10;
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pressure_angle=30;
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gear(
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number_of_teeth=teeth,
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circular_pitch=320,
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pressure_angle=pressure_angle,
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clearance = 0.2,
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gear_thickness = height/2,
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rim_thickness = height/2,
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rim_width = 1,
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hub_thickness = height/2,
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hub_diameter=1,
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bore_diameter=shaft,
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circles=circles,
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twist=twist/teeth
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);
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mirror( [0,0,1] )
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gear(
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number_of_teeth=teeth,
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circular_pitch=320,
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pressure_angle=pressure_angle,
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clearance = 0.2,
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gear_thickness = height/2,
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rim_thickness = height/2,
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rim_width = 1,
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hub_thickness = height/2,
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hub_diameter=1,
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bore_diameter=shaft,
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circles=circles,
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twist=twist/teeth
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);
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}
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// Motor gear
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rotate([180,0,0]) union() difference() {
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union() {
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//gear
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herringbone_gear( teeth=8 );
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translate( [0, 0, 12] ) mirror( [0, 0, 1] ) difference() {
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//shaft
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cylinder( r=shaft_diam, h=shaft_height, $fn=40 );
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//captive nut and grub holes
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for (i=[0:2]){ //3 symmetric grubscrews
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rotate([0,0,i*120]){
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translate( [0, 20, 3.5] ) rotate( [90, 0, 0] ) union() {
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//entrance for nut
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translate( [0, -4.4, pos] ) cube( [5.9, 5.8, 2.45], center=true );
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//nut hole
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translate( [0, 0, pos-1.2] ) rotate( [0, 0, 30] )
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cylinder( r=6/2+0.2, h=2.6, $fn=6 );
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//grub screw hole
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translate( [0, 0, 9] ) cylinder( r=1.5, h=10, $fn=20 );
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}
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}
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}
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}
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}
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//shaft hole
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translate( [0, 0, -6] ) cylinder( r=motor_shaft_diameter/2, h=20, $fn=30 );
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}
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