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/prusajr/PrusaMendel
   8
   9 include <configuration.scad>
  10 use <inc/bearing-guide.scad>
  11
  12 module motorholder(thickness=10){
  13     difference(){
  14         union(){
  15             // Motor holding part
  16             translate([29, -21 + 50, 0])
  17             {
  18                 //#cube([42, 42, 2], center=true);
  19                 difference(){
  20                     union(){
  21                         translate([-21 + 4.5, 0, 5]) cube([9, 31, thickness], center=true);
  22                         nema17([0, 1, 1, 0], thickness=thickness, shadow=false);
  23                         mirror([0, 0, 1]) translate([0, 0, -10]) nema17([0, 1, 1, 0], thickness=thickness, shadow=7);
  24                         // Parts joining part
  25                         translate([-29, -21, 0]) cube([14, 30, thickness]);
  26                     }
  27                     // Motor mounting holes
  28                     translate([0, 0, thickness]) mirror([0, 0, 1]) nema17([0, 1, 1, 0], thickness=thickness, holes=true);
  29                 }
  30             }
  31
  32             // Front holding part
  33             translate([0, 10, 0]) cylinder(h = thickness, r=8);
  34             translate([0, 20, 5]) cube([16, 20, thickness], center=true);
  35             translate([0, 30, 0]) cylinder(h = thickness, r=8);
  36         }
  37         translate([0, 10, -1]) cylinder(h = 12, r=4.5);
  38         translate([0, 30, -1]) cylinder(h = 12, r=4.5);
  39     }
  40 }
  41
  42 module oval(r=4, l=15, h=2){
  43     intersection() {
  44         union() {
  45             translate([l / 2, 0, 0]) cylinder(r=r, h=h, $fn=4);
  46             translate([-l / 2, 0, 0]) cylinder(r=r, h=h, $fn=4);
  47             translate([0, 0, h / 2]) cube([l, r * 2, h], center=true);
  48         }
  49         translate([0, 0, h / 2]) cube([l + r * 1.2, r * 2, h], center=true);
  50     }
  51 }
  52
  53
  54 module idlermount(len=42, narrow_len=0, narrow_width=0, rod=threaded_rod_diameter_horizontal / 2, idler_height=16){
  55     difference(){
  56         union(){
  57             //wide part holding bearing
  58             translate([- (10 + idler_width) / 2, -25 + narrow_len, 0] ) cube_fillet([10 + idler_width, len + idler_bearing[2] * 1.1 - narrow_len, idler_height]);
  59             //For X there is narrow part inside the x-idler
  60             if (narrow_len > 0){
  61                 translate([-narrow_width / 2, -25, 0] ) cube_fillet([narrow_width, len + idler_bearing[2], idler_height], vertical=[0, 0, 2, 2]);
  62                 mirror([1, 0, 0]) translate([-narrow_width / 2, narrow_len -25, idler_height / 2 ]) fillet(1.5, idler_height - 0.04, $fn=8);
  63                 translate([-narrow_width / 2, narrow_len -25, idler_height / 2]) fillet(1.5, idler_height - 0.04, $fn=8);
  64             }
  65         }
  66         translate([-12, -10, idler_height / 2]) rotate([90, 0, 90]) oval(r=rod, l=12, h=25);
  67         //nut
  68         translate([0, -17, idler_height / 2]) rotate([90, 0, 0]) cylinder(r=m4_nut_diameter_horizontal / 2, h=9, $fn=6, center=true);
  69         translate([0, -19, idler_height / 2]) rotate([90, 90, 0]) cylinder(r=m4_diameter / 2, h=15, $fn=7, center=true);
  70
  71             translate([0, len + idler_bearing[2] - 33, idler_height / 2]) {
  72                 rotate([0, 90, 0]) idler_assy(idler_bearing);
  73                 translate([0, 10, 0]) cube([idler_width + 1, 20, idler_height + 2], center=true);
  74             }
  75
  76     }
  77 }
  78
  79
  80 motorholder();
  81 translate([32, 20, 0])  idlermount();
  82
  83 if (idler_bearing[3] == 1) {
  84     translate([0, -12 - idler_bearing[0] / 2, 0]) {
  85         bearing_guide_inner();
  86         translate([idler_bearing[0] + 10, 0, 0])
  87             bearing_guide_outer();
  88     }
  89 }