137 lines
4.0 KiB
OpenSCAD
137 lines
4.0 KiB
OpenSCAD
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/* 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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* Copyright (C) 2011 Guy 'DeuxVis' P.
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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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* 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/materials.scad>
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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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BigGear_N_Teeth = 21; // 24
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nholes = 9; // 7
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holes_diam = 6;
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hole_distance_from_center = 13.5-4.5+holes_diam/2;
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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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module cyclone_motor_gear(with_extra_parts=false, exploded=false) {
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// Motor gear
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union() difference() {
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union() {
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//gear
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herringbone_gear( teeth=BigGear_N_Teeth );
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translate( [0, 0, 12] ) mirror( [0, 0, 1] ) difference() {
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//shaft
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cylinder( r=9, h=15, $fn=40 );
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//adapted to include 3 captive nuts for symmetrical positioning
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//adpted bij HJ Binnema on August 26 2013.
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for (i= [0:2]){
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rotate([0,0,i*120]){
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//captive nut and grub holes
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translate( [0, 20, 3.5] ) rotate( [90, 0, 0] ) union() {
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//enterance
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translate( [0, -3, 14.5] ) cube( [6, 6, 2.6], center=true );
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//nut
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translate( [0, 0, 13.3] ) rotate( [0, 0, 30] )
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cylinder( r=6/2+0.5, h=2.6, $fn=6 );
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//grub hole
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translate( [0, 0, 9] ) cylinder( r=3.2/2, h=10, $fn=6 );
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}}}
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}
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}
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//holes to save plastic
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for(i=[0:nholes-1])
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rotate( [0, 0, i*360/(nholes)+45], $fn=20 )
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translate( [hole_distance_from_center, 0] )
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cylinder( r=holes_diam/2, h=11, center=true, $fn=30 );
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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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if(with_extra_parts)
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cyclone_motor_gear_extras(exploded_distance=(exploded?20:0));
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module cyclone_motor_gear_extras(exploded_distance=0) {
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echo("Non-Plastic Parts, 1, Grub Screw M3 x 8 mm to attach gear to motor shaft");
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translate([0,2.5+8+exploded_distance,12-3.5])
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rotate([90, 0, 0])
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color(Steel) cylinder(r=1.5, h=8, $fn=30);
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}
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}
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cyclone_motor_gear();
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