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 use <bearing.scad>
   9
  10 rod_distance = 45;
  11 pushfit_d = 8.15;
  12 hex_nut_r = 4.75;
  13
  14 module nut_trap_base () {
  15      cube(size=[7.8,20,8],center=true);
  16      translate ([2,0,0]) cylinder(h=8,r=12.5,$fn=50,center=true);
  17 }
  18
  19 module nut_trap () {
  20      union() {
  21                // center post of brass nut
  22                    cylinder(h=12,r=5.45,$fn=50,center=true);
  23                    // holes for m3 screws in brass nut
  24                    #translate(v=[8,0,0]) cylinder(h=12,r=1.8,$fn=20,center=true);
  25                    #rotate([0,0,90]) translate(v=[8,0,0]) cylinder(h=12,r=1.8,$fn=20,center=true);
  26                    #rotate([0,0,180]) translate(v=[8,0,0]) cylinder(h=12,r=1.8,$fn=20,center=true);
  27                    #rotate([0,0,270]) translate(v=[8,0,0]) cylinder(h=12,r=1.8,$fn=20,center=true);
  28            }
  29 }
  30
  31 module x_end_base(){
  32 // Main block
  33 height = 58;
  34 translate(v=[-15,-9,height/2]) cube(size = [17,39,height], center = true);
  35 // Bearing holder
  36  vertical_bearing_base();
  37 //Nut trap
  38  translate(v=[-2-2,-17,4]) nut_trap_base ();
  39  // Cube
  40 // #translate(v=[-2-2,-17,4]) cube(size = [8,16,8], center = true);
  41  // Hexagon
  42 // #translate(v=[0,-17,0]) rotate([0,0,30]) cylinder(h = 8, r=8, $fn = 6);
  43 }
  44
  45 module x_end_holes(){
  46  vertical_bearing_holes();
  47  // Belt hole
  48  translate(v=[-1,0,0]){
  49  // Stress relief
  50  translate(v=[-5.5-10+1.5,-10-1,30]) cube(size = [20,1,28], center = true);
  51  difference(){
  52         translate(v=[-5.5-10+1.5,-10,30]) cube(size = [10,46,28], center = true);
  53
  54         // Nice edges
  55         translate(v=[-5.5-10+1.5,-10,30+23]) rotate([0,45,0]) cube(size = [10,46,28], center = true);
  56         translate(v=[-5.5-10+1.5,-10,30+23]) rotate([0,-45,0]) cube(size = [10,46,28], center = true);
  57         translate(v=[-5.5-10+1.5,-10,30-23]) rotate([0,45,0]) cube(size = [10,46,28], center = true);
  58         translate(v=[-5.5-10+1.5,-10,30-23]) rotate([0,-45,0]) cube(size = [10,46,28], center = true);
  59
  60 }
  61 }
  62
  63
  64
  65 // Bottom pushfit rod
  66 translate(v=[-15,-41.5,6]) rotate(a=[-90,0,0]) pushfit_rod(pushfit_d,50);
  67 // Top pushfit rod
  68 translate(v=[-15,-41.5,rod_distance+6]) rotate(a=[-90,0,0]) pushfit_rod(pushfit_d,50);
  69 // Nut trap
  70 translate(v=[0,-17,3]) nut_trap ();
  71 // #translate(v=[0,-17,-0.5]) cylinder(h = 4, r1=3.4, r2=2.9, $fn=25);
  72 // translate(v=[0,-17,3]) rotate([0,0,30]) cylinder(h = 10, r=hex_nut_r, $fn = 6);
  73 }
  74
  75
  76 // Final prototype
  77 module x_end_plain(){
  78  difference(){
  79   x_end_base();
  80   x_end_holes();
  81  }
  82 }
  83
  84 x_end_plain();
  85
  86
  87 module pushfit_rod(diameter,length){
  88  translate([0,-0.3,0])  cylinder(h = length, r=diameter/2, $fn=30);
  89  translate([0,0.3,0])  cylinder(h = length, r=diameter/2, $fn=30);
  90 // difference(){
  91 //      translate(v=[0,-diameter/2.85,length/2]) rotate([0,0,45]) cube(size = [diameter/2,diameter/2,length], center = true);
  92 //      translate(v=[0,-diameter/4-diameter/2-0.4,length/2]) rotate([0,0,0]) cube(size = [diameter,diameter/2,length], center = true);
  93 // }
  94
  95 }
  96