scad/x-end.scad

   1 // PRUSA iteration3
   2 // X end prototype
   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
   8 // todo: make x-end height global and make anything relying implicitly
   9 // on the height of the x-end use that for positioning.
  10
  11 // bearing height, strain relief (&& maybe make dependent upon the bearing diameter)
  12
  13
  14
  15 // major issues with rev 3
  16
  17 // - motor side screw hole conflicts with switch / other rear mount is
  18 //   inaccessible without removing the leadscrew from the nut
  19
  20 // - New idler anti-pitching ribs are too big (new idler I wasn't
  21 //   using is larger so the existing ones worked fine for that one...)
  22 //   NOTE: new idler is meant for integrated toothed idler...
  23
  24 use <bearing.scad>
  25 include <configuration.scad>
  26
  27 pushfit_d = smooth_rod_d + 0.25;
  28 hex_nut_r = 4.75;
  29
  30 module nut_trap_base () {
  31      cube(size=[16,21,8],center=true);
  32      translate ([2,0,0]) cylinder(h=8,r=12.5,$fn=50,center=true);
  33 }
  34
  35 module nut_trap () {
  36      union() {
  37                // center post of brass nut
  38                    cylinder(h=12,r=5.45,$fn=50,center=true);
  39                    // holes for m3 screws in brass nut
  40                    translate(v=[8,0,0]) cylinder(h=12,r=1.8,$fn=20,center=true);
  41                    #rotate([0,0,90]) translate(v=[8,0,0]) cylinder(h=12,r=1.8,$fn=20,center=true);
  42                    rotate([0,0,180]) translate(v=[8,0,0]) cylinder(h=12,r=1.8,$fn=20,center=true);
  43                    #rotate([0,0,270]) translate(v=[8,0,0]) cylinder(h=12,r=1.8,$fn=20,center=true);
  44      }
  45 }
  46
  47 module x_end_base(){
  48 // Main block
  49 height = x_box_height;
  50 // TODO: calculate correct translate(y) + cube(y) using size of bearing
  51 translate(v=[-15,-10,height/2]) cube(size = [17,45,height], center = true);
  52 // Bearing holder
  53  vertical_bearing_base();
  54 //Nut trap
  55  translate(v=[-4-zmotor_delta_y,-17-zmotor_delta_x,4]) nut_trap_base ();
  56  // Cube
  57 // #translate(v=[-2-2,-17,4]) cube(size = [8,16,8], center = true);
  58  // Hexagon
  59 // #translate(v=[0,-17,0]) rotate([0,0,30]) cylinder(h = 8, r=8, $fn = 6);
  60 }
  61
  62 module x_end_holes(){
  63  vertical_bearing_holes();
  64  // Belt hole
  65  translate(v=[-1,0,0]){
  66  // Stress relief
  67  translate(v=[-5.5-10+1.5,-bearing_diameter/2-4,30]) cube(size = [20,1,28], center = true);
  68  // Cut out for belt (this is NOT centered because the motor isn't centered)
  69  difference(){
  70         translate(v=[-5.5-10+1.5,-10,30]) cube(size = [10,46,28], center = true);
  71
  72         // Nice edges
  73         translate(v=[-5.5-10+1.5,-10,30+23]) rotate([0,45,0]) cube(size = [10,46,28], center = true);
  74         translate(v=[-5.5-10+1.5,-10,30+23]) rotate([0,-45,0]) cube(size = [10,46,28], center = true);
  75         translate(v=[-5.5-10+1.5,-10,30-23]) rotate([0,45,0]) cube(size = [10,46,28], center = true);
  76         translate(v=[-5.5-10+1.5,-10,30-23]) rotate([0,-45,0]) cube(size = [10,46,28], center = true);
  77
  78 }
  79 }
  80
  81
  82  pushrod_extra_z = 2.5;
  83 // Bottom pushfit rod
  84 #translate(v=[-15,-41.5,smooth_rod_d/2+pushrod_extra_z]) rotate(a=[-90,0,0]) pushfit_rod(pushfit_d,50);
  85 // Top pushfit rod
  86 translate(v=[-15,-41.5,rod_distance+smooth_rod_d/2+pushrod_extra_z]) rotate(a=[-90,0,0]) pushfit_rod(pushfit_d,50);
  87 // Nut trap
  88 translate(v=[-zmotor_delta_y,-17-zmotor_delta_x,3]) rotate ([0, 0, 45]) nut_trap ();
  89 // #translate(v=[0,-17,-0.5]) cylinder(h = 4, r1=3.4, r2=2.9, $fn=25);
  90 // translate(v=[0,-17,3]) rotate([0,0,30]) cylinder(h = 10, r=hex_nut_r, $fn = 6);
  91 }
  92
  93
  94 // Final prototype
  95 module x_end_plain(){
  96  difference(){
  97   x_end_base();
  98   x_end_holes();
  99  }
 100 }
 101
 102 x_end_plain();
 103
 104
 105 module pushfit_rod(diameter,length){
 106  translate([0,-0.3,0])  cylinder(h = length, r=diameter/2, $fn=30);
 107  translate([0,0.3,0])  cylinder(h = length, r=diameter/2, $fn=30);
 108 // difference(){
 109 //      translate(v=[0,-diameter/2.85,length/2]) rotate([0,0,45]) cube(size = [diameter/2,diameter/2,length], center = true);
 110 //      translate(v=[0,-diameter/4-diameter/2-0.4,length/2]) rotate([0,0,0]) cube(size = [diameter,diameter/2,length], center = true);
 111 // }
 112
 113 }
 114