scad/x-end-idler.scad

   1 // PRUSA iteration3
   2 // X end idler
   3 // GNU GPL v3
   4 // Josef Průša <iam@josefprusa.cz> and contributors
   5 // http://www.reprap.org/wiki/Prusa_Mendel
   6 // http://prusamendel.org
   7 // Alterations for reprap wilson by M. Rice <mrice411@gmail.com>
   8
   9 include <configuration.scad>
  10 use <x-end.scad>
  11
  12 idler_offs_z = -1; // negative here means "up" when installed
  13 idler_offs_y = 4;
  14
  15 center_z = 30.25 -1;
  16 tensioner_size_z = 12;
  17
  18 module x_end_idler_base(){
  19  x_end_base();
  20 }
  21
  22 module x_end_idler_holes(){
  23  x_end_holes();
  24  translate([0,idler_offs_y,idler_offs_z]) {
  25       #translate(v=[0,-22,30.25]) rotate(a=[0,-90,0]) cylinder(h = 80, r=idler_bearing_inner_d/2+.3, $fn=30);
  26       #translate(v=[2,-22,30.25]) rotate(a=[0,-90,0]) cylinder(h = 10, r=idler_bearing_inner_d/2 + 1, $fn=30);
  27       #translate(v=[-21.5,-22,30.25]) rotate(a=[0,-90,0]) rotate(a=[0,0,30]) cylinder(h = 80, r=idler_bearing_inner_d, $fn=6);
  28
  29       // create a notch for the X tensioner, to improve the length of
  30       // travel available
  31       translate (v=[0,-22,30.25]) translate(v=[-10,-20,1]) #difference()  {
  32            rotate(a=[45,0,0])  cube(size=[30,22,22],center=true);
  33            translate(v=[0,14,0]) cube(size=[31,4,8],center=true);
  34       }
  35  }
  36 }
  37
  38 // Final part
  39 module x_end_idler(){
  40  mirror([0,1,0]) difference(){
  41   x_end_idler_base();
  42   x_end_idler_holes();
  43  }
  44
  45  // added ridges to keep the tensioner from pitching
  46  for (x = [-9.8, -20.2], z = [center_z-tensioner_size_z/2 - .5, center_z+tensioner_size_z/2 + .5]) {
  47       d = 2;
  48       translate(v=[x,1, z]) intersection () {
  49            rotate ([45, 0, 90]) cube(size=[20,d, d],center=true);
  50            translate ([(x < -15) ? d  : -d, 0, 0]) rotate ([0, 0, 90]) cube(size=[20,d*2, d*2],center=true);
  51       }
  52  }
  53 }
  54
  55 x_end_idler();
  56
  57