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 use <bearing.scad>
  14 include <configuration.scad>
  15
  16 pushfit_d = smooth_rod_d + 0.25;
  17 hex_nut_r = 4.75;
  18
  19 module nut_trap_base () {
  20      cube(size=[16,21,8],center=true);
  21      translate ([2,0,0]) cylinder(h=8,r=12.5,$fn=50,center=true);
  22 }
  23
  24 module nut_trap () {
  25      union() {
  26                // center post of brass nut
  27                    cylinder(h=12,r=5.45,$fn=50,center=true);
  28                    // holes for m3 screws in brass nut
  29                    translate(v=[8,0,0]) cylinder(h=12,r=1.8,$fn=20,center=true);
  30                    #rotate([0,0,90]) translate(v=[8,0,0]) cylinder(h=12,r=1.8,$fn=20,center=true);
  31                    rotate([0,0,180]) translate(v=[8,0,0]) cylinder(h=12,r=1.8,$fn=20,center=true);
  32                    #rotate([0,0,270]) translate(v=[8,0,0]) cylinder(h=12,r=1.8,$fn=20,center=true);
  33      }
  34 }
  35
  36 module x_end_base(){
  37 // Main block
  38 height = x_box_height;
  39 // TODO: calculate correct translate(y) + cube(y) using size of bearing
  40 translate(v=[-15,-10,height/2]) cube(size = [17,45,height], center = true);
  41 // Bearing holder
  42  vertical_bearing_base();
  43 //Nut trap
  44  translate(v=[-4-zmotor_delta_y,-17-zmotor_delta_x,4]) nut_trap_base ();
  45  // Cube
  46 // #translate(v=[-2-2,-17,4]) cube(size = [8,16,8], center = true);
  47  // Hexagon
  48 // #translate(v=[0,-17,0]) rotate([0,0,30]) cylinder(h = 8, r=8, $fn = 6);
  49 }
  50
  51 module x_end_holes(){
  52  vertical_bearing_holes();
  53  // Belt hole
  54  translate(v=[-1,0,0]){
  55  // Stress relief
  56  translate(v=[-5.5-10+1.5,-bearing_diameter/2-4,30]) cube(size = [20,1,28], center = true);
  57  // Cut out for belt (this is NOT centered because the motor isn't centered)
  58  difference(){
  59         translate(v=[-5.5-10+1.5,-10,30]) cube(size = [10,46,28], center = true);
  60
  61         // Nice edges
  62         translate(v=[-5.5-10+1.5,-10,30+23]) rotate([0,45,0]) cube(size = [10,46,28], center = true);
  63         translate(v=[-5.5-10+1.5,-10,30+23]) rotate([0,-45,0]) cube(size = [10,46,28], center = true);
  64         translate(v=[-5.5-10+1.5,-10,30-23]) rotate([0,45,0]) cube(size = [10,46,28], center = true);
  65         translate(v=[-5.5-10+1.5,-10,30-23]) rotate([0,-45,0]) cube(size = [10,46,28], center = true);
  66
  67 }
  68 }
  69
  70
  71  pushrod_extra_z = 2.5;
  72 // Bottom pushfit rod
  73 #translate(v=[-15,-41.5,smooth_rod_d/2+pushrod_extra_z]) rotate(a=[-90,0,0]) pushfit_rod(pushfit_d,50);
  74 // Top pushfit rod
  75 translate(v=[-15,-41.5,rod_distance+smooth_rod_d/2+pushrod_extra_z]) rotate(a=[-90,0,0]) pushfit_rod(pushfit_d,50);
  76 // Nut trap
  77 translate(v=[-zmotor_delta_y,-17-zmotor_delta_x,3]) rotate ([0, 0, 45]) nut_trap ();
  78 // #translate(v=[0,-17,-0.5]) cylinder(h = 4, r1=3.4, r2=2.9, $fn=25);
  79 // translate(v=[0,-17,3]) rotate([0,0,30]) cylinder(h = 10, r=hex_nut_r, $fn = 6);
  80 }
  81
  82
  83 // Final prototype
  84 module x_end_plain(){
  85  difference(){
  86   x_end_base();
  87   x_end_holes();
  88  }
  89 }
  90
  91 x_end_plain();
  92
  93
  94 module pushfit_rod(diameter,length){
  95  translate([0,-0.3,0])  cylinder(h = length, r=diameter/2, $fn=30);
  96  translate([0,0.3,0])  cylinder(h = length, r=diameter/2, $fn=30);
  97 // difference(){
  98 //      translate(v=[0,-diameter/2.85,length/2]) rotate([0,0,45]) cube(size = [diameter/2,diameter/2,length], center = true);
  99 //      translate(v=[0,-diameter/4-diameter/2-0.4,length/2]) rotate([0,0,0]) cube(size = [diameter,diameter/2,length], center = true);
 100 // }
 101
 102 }
 103