box_frame/extras/wade-gears.scad

   1 // Herringbone extruder gears
   2 // GNU GPL v3
   3 // Václav 'ax' Hůla <axtheb@gmail.com>
   4 // Josef Průša <josefprusa@me.com>
   5
   6 // ThingDoc entry
   7 /**
   8  * @name Greg's Large Gear
   9  * @id large-gear
  10  */
  11
  12 /**
  13  * @name Greg's Small Gear
  14  * @id small-gear
  15  */
  16
  17 include <../configuration.scad>
  18 use <inc/parametric_involute_gear_v5.0.scad>
  19
  20 gear_distance = 40;
  21
  22 small();
  23 %translate([gear_distance, 0, 0]) rotate([0, 180, 92]) big(); //this should touch, teeth should mesh
  24 translate([-gear_distance - 10, 10, 0]) big();
  25
  26 gear_width=12;
  27 teeth_small=15;
  28 teeth_big=49;
  29 teeth_twist=400;
  30 circular_pitch = (gear_distance * 180 * 2) / (teeth_small + teeth_big);
  31 echo (circular_pitch);
  32
  33 module small(){
  34     difference() {
  35         union() {
  36             mirror([0, 0, 1 ]) gear (number_of_teeth=teeth_small,
  37                     circular_pitch=circular_pitch,
  38                     gear_thickness = gear_width/2,
  39                     rim_thickness = gear_width/2,
  40                     hub_thickness = 0,
  41                     hub_diameter = 18,
  42                     bore_diameter = 5.25,
  43                     circles=0,
  44                     twist = teeth_twist/teeth_small);
  45             gear (number_of_teeth=teeth_small,
  46                     circular_pitch=circular_pitch,
  47                     gear_thickness = gear_width/2,
  48                     rim_thickness = gear_width,
  49                     hub_thickness = 0,
  50                     hub_diameter = 18,
  51                     bore_diameter = 5.25,
  52                     circles=0,
  53                     twist = teeth_twist/teeth_small*2);
  54             //hub. Two part to make it thicker
  55             translate([0, 0, gear_width / 2 + 0.5]) {
  56                 cylinder(r1=8, r2=11, h=2.5);
  57             }
  58             translate([0, 0, gear_width / 2 + 3]) {
  59                 cylinder(r=11, h=6);
  60             }
  61         }
  62         //bore
  63         translate([0, 0, -gear_width / 2 + 0.1]) cylinder(r=5.25 / 2, h=gear_width + 9.2);
  64
  65         translate([0, 0, gear_width / 2 + 4.5]) rotate([0, 90, 0]) {
  66             cylinder(r=m3_diameter / 2, h=20);
  67             translate([0, 0, 5]) nut(m3_nut_diameter, 2.5, false);
  68             translate([-10, -m3_nut_diameter / 2, 5]) cube([10, m3_nut_diameter, 2.5]);
  69         }
  70     }
  71 }
  72
  73 hole_size=6.6;
  74
  75 module big(){
  76     difference() {
  77         union(){
  78             mirror([0, 0, 1]) gear (number_of_teeth=teeth_big,
  79                     circular_pitch=circular_pitch,
  80                     gear_thickness = gear_width/2,
  81                     rim_thickness = gear_width/2,
  82                     hub_thickness = 0,
  83                     hub_diameter = 0,
  84                     bore_diameter = 0,
  85                     circles=0,
  86                     twist = teeth_twist/teeth_big);
  87             gear (number_of_teeth=teeth_big,
  88                     circular_pitch=circular_pitch,
  89                     gear_thickness = gear_width/2,
  90                     rim_thickness = gear_width/2,
  91                     hub_thickness = 0,
  92                     hub_diameter = 18,
  93                     bore_diameter = 18,
  94                     circles=0,
  95                     twist = teeth_twist/teeth_big);
  96         }
  97         //reduce mass
  98         translate([0, 0, 3 - gear_width / 2]) rotate([0, 0, 90])
  99                                 cylinder(r1=24, r2=28, h=gear_width - layer_height * 9 + 1, $fn=36);
 100         //bore
 101         translate([0, 0, -gear_width / 2 - 0.1]) cylinder(r=m8_diameter / 2, h=gear_width + 9.2);
 102         for (hole=[0:5]) {
 103             rotate([0, 0, 360 / 6 * hole + 30]) translate([17,0,-10]) rotate(12) {
 104                 cylinder(r=hole_size, h=20);
 105                 cube([hole_size, hole_size, 20]);
 106             }
 107         }
 108
 109     }
 110     //threaded bolt trap
 111     difference(){
 112         translate([0, 0, -gear_width / 2]) cylinder(r=10, h=7 + layer_height * 9);
 113         translate([0, 0, -gear_width / 2 + layer_height * 6 + 2]) nut(13.1, h=10);
 114         translate([0, 0, -gear_width / 2 - 0.1]) cylinder(r=m8_diameter / 2, h=gear_width + 9.2);
 115     }
 116
 117 }