box_frame/y-drivetrain.scad

   1 // PRUSA iteration3
   2 // Y drivetrain (idler and stepper holders)
   3 // GNU GPL v3
   4 // Josef Průša <josefprusa@me.com>
   5 // Václav 'ax' Hůla <axtheb@gmail.com>
   6 // http://www.reprap.org/wiki/Prusa_Mendel
   7 // http://github.com/josefprusa/Prusa3
   8
   9 // ThingDoc entry
  10 /**
  11  * @id yMotorHolder
  12  * @name Y Axis Motor Holder
  13  * @category Printed
  14  */
  15
  16 /**
  17  * @yIdler
  18  * @name Y Axis Belt Idler
  19  * @category Printed
  20  */
  21
  22 include <configuration.scad>
  23 use <inc/bearing-guide.scad>
  24
  25 module motorholder(thickness=10){
  26     difference(){
  27         union(){
  28             // Motor holding part
  29             translate([29, -21 + 50, 0])
  30             {
  31                 //#cube([42, 42, 2], center=true);
  32                 difference(){
  33                     union(){
  34                         translate([-21 + 4.5, 0, 5]) cube([9, 31, thickness], center=true);
  35                         nema17([0, 1, 1, 0], thickness=thickness, shadow=false);
  36                         mirror([0, 0, 1]) translate([0, 0, -10]) nema17([0, 1, 1, 0], thickness=thickness, shadow=7);
  37                         // Parts joining part
  38                         translate([-29, -21, 0]) cube([14, 30, thickness]);
  39                     }
  40                     // Motor mounting holes
  41                     translate([0, 0, thickness]) mirror([0, 0, 1]) nema17([0, 1, 1, 0], thickness=thickness, holes=true);
  42                 }
  43             }
  44
  45             // Front holding part
  46             translate([0, 10, 0]) cylinder(h = thickness, r=8);
  47             translate([0, 20, 5]) cube([16, 20, thickness], center=true);
  48             translate([0, 30, 0]) cylinder(h = thickness, r=8);
  49         }
  50         translate([0, 10, -1]) cylinder(h = 12, r=4.5, $fn=32);
  51         translate([0, 30, -1]) cylinder(h = 12, r=4.5, $fn=32);
  52     }
  53 }
  54
  55 module oval(r=4, l=14, h=2){
  56     intersection() {
  57         union() {
  58             translate([l / 2, 0, 0]) cylinder(r=r, h=h, $fn=4);
  59             //translate([-l / 2, 0, 0]) cylinder(r=r, h=h, $fn=4);
  60             translate([0, 0, h / 2]) cube([l, r * 2, h], center=true);
  61         }
  62         translate([0, 0, h / 2]) cube([l + r * 1.2, r * 2, h], center=true);
  63     }
  64 }
  65
  66 module idlermount(len=43, narrow_len=0, narrow_width=0, rod=threaded_rod_diameter_horizontal / 2, idler_height=16){
  67     difference(){
  68         union(){
  69             //wide part holding bearing
  70             translate([- (10 + idler_width) / 2, -25 + narrow_len, 0] ) cube_fillet([10 + idler_width, len + idler_bearing[2] * 1.1 - narrow_len, idler_height]);
  71             //For X there is narrow part inside the x-idler
  72             if (narrow_len > 0){
  73                 translate([-narrow_width / 2, -25, 0] ) cube_fillet([narrow_width, len + idler_bearing[2], idler_height], vertical=[0, 0, 2, 2]);
  74                 mirror([1, 0, 0]) translate([-narrow_width / 2, narrow_len -25, idler_height / 2 ]) fillet(1.5, idler_height - 0.04, $fn=8);
  75                 translate([-narrow_width / 2, narrow_len -25, idler_height / 2]) fillet(1.5, idler_height - 0.04, $fn=8);
  76             }
  77         }
  78         translate([-12, -8, idler_height / 2]) rotate([90, 0, 90]) oval(r=rod + 0.01, l=12, h=25);
  79         translate([0, -13 - single_wall_width*2, idler_height / 2]) {
  80             // nut for tensioning screw
  81             translate([0,0,0]) rotate([90, 0, 0]) cylinder(r=m4_nut_diameter_horizontal / 2, h=3.8, $fn=6);
  82             // nut insert
  83             translate([-2, -3.8, -m4_diameter * 1.5 / 2]) cube([20, 3.8, m4_diameter * 1.5+0.3]);
  84         }
  85
  86         // tensioning screw goes here
  87         translate([0, -19, idler_height / 2]) rotate([90, 90, 0]) cylinder(r=m4_diameter / 2, h=15, $fn=small_hole_segments, center=true);
  88         // bearing goes there
  89         translate([0, len + idler_bearing[2] - 33, idler_height / 2]) {
  90             rotate([0, 90, 0]) idler_assy(idler_bearing);
  91             translate([0, 10, 0]) cube([idler_width + 1, 20, idler_height + 2], center=true);
  92         }
  93
  94     }
  95 }
  96
  97
  98 motorholder();
  99 translate([32, 25, 0])  idlermount();
 100
 101 if (idler_bearing[3] == 1) {
 102     translate([0, -12 - idler_bearing[0] / 2, 0]) {
 103         render() bearing_assy();
 104     }
 105 }