scad/y-end-idler.scad

   1 //
   2 // Parametric single-piece y ends for Reprap Wilson
   3 // GNU GPL v3
   4 // by Martin Rice <mrice411@gmail.com>
   5 //
   6 include <configuration.scad>
   7
   8 washer_recess     = 2; // recesses the washer into the end.
   9 idler_offset_y    = 6;
  10 base_thickness    = 3;
  11 tie_wrap_extra = 1;
  12 belt_h = 29;
  13 idler_w = 10; // the gap provided for the bearing holder
  14 idler_wall_t = 5;
  15 end_w = 193.5;
  16 idler_wall_h = 32.6;
  17
  18 yend_idler();
  19
  20 module yend_idler()
  21 {
  22   difference() {
  23     union() {
  24       // thin base under the end (optional)
  25       bigbase();
  26       brace();
  27
  28       // first corner
  29       endpost();
  30
  31       // second corner
  32       translate([end_w,0,0]) scale([-1,1,1]) endpost();
  33
  34       // idler mount
  35       translate([end_w/2,0,0]) idler_post();
  36     }
  37
  38      // bevels on outer corners
  39      translate([-1,-23/2,-1])    rotate([0,0,45]) cube([10,10,50]);
  40      translate([end_w+1,-23/2,-1]) rotate([0,0,45]) cube([10,10,50]);
  41
  42      // cutout for idler
  43      #translate([end_w/2,0,0]) translate([-idler_wall_t,10,belt_h]) rotate([0,90,0]) cylinder(r=10+4,h=idler_w);
  44
  45      // slots for attaching end to table surface if desired
  46      #translate([end_w/2-end_w/4,20,0]) cube(size=[4,10,10],center=true);
  47      #translate([end_w/2+end_w/4,20,0]) cube(size=[4,10,10],center=true);
  48   }
  49 }
  50
  51
  52 module idler_post()
  53 {
  54     difference() {
  55          union() {
  56              translate([idler_w/2,0,0]) {
  57                    cube(size=[idler_wall_t,20,belt_h]);
  58                    translate([0,10,belt_h]) rotate([0,90,0]) cylinder(r=10,h=idler_wall_t);
  59              }
  60              translate([-idler_w/2-idler_wall_t,0,0]) {
  61                    cube(size=[idler_wall_t,20,belt_h]);
  62                    translate([0,10,belt_h]) rotate([0,90,0]) cylinder(r=10,h=idler_wall_t);
  63              }
  64              translate([-idler_w,0,0]) cube(size=[idler_wall_t * 2 + idler_w,20,belt_h/2]);
  65
  66              //translate([-idler_w,-1,idler_wall_h]) rotate([0,90,0]) cylinder(r=idler_bearing_inner_d/2,h=20,$fn=20);
  67
  68          }
  69          // holes for idler bolt
  70          #translate([-12,10,belt_h]) rotate([0,90,0]) {
  71              cylinder(r=idler_bearing_inner_d/2+.5,h=25);
  72              translate([0,0,1]) cylinder(r=idler_bearing_inner_d,h=3);
  73              translate([0,0,idler_w+idler_wall_t*2]) cylinder(r=idler_bearing_inner_d,h=3,$fn=6);
  74          }
  75
  76
  77     }
  78 }
  79
  80 module endpost()
  81 {
  82      difference() {
  83        union() {
  84          difference() {
  85            cube([23,16,height_of_post]);
  86            #translate([23/2,7,height_of_post]) rotate([-90,0,0]) cylinder(r=smooth_rod_d/2+2+tie_wrap_t+tie_wrap_extra,h=tie_wrap_w);
  87          }
  88
  89          difference() {
  90          translate([23/2,7,height_of_post]) rotate([-90,0,0]) cylinder(r=smooth_rod_d/2+2+tie_wrap_extra,h=tie_wrap_w);
  91          translate([0,0,height_of_post]) cube([23,16,10]);
  92          }
  93        }
  94
  95        translate([23/2,-10,height_of_threaded ]) rotate([-90,0,0]) cylinder(r=threaded_rod_d/2+.4,h=380);
  96        translate([23/2,-.1,height_of_threaded ]) rotate([-90,0,0]) cylinder(r=washer_d/2+.4,h=washer_recess);
  97        translate([23/2,2.5,height_of_smooth]) rotate([-90,0,0]) cylinder(r=smooth_rod_d/2+.1,h=380);
  98      }
  99
 100 }
 101
 102 module bigbase()
 103 {
 104    difference() {
 105     intersection() {
 106        cube([193.5,55,base_thickness]);
 107        translate([193.5/2,-182,-1]) cylinder(r=220,h=base_thickness+2,$fn=150);
 108        }
 109     //#translate([193.5/2,0,0]) cylinder(r=10,h=10);
 110 }
 111 }
 112
 113 module brace() {
 114     translate([193.5,17,0]) rotate([0,0,180]) difference() {
 115                     translate([193.5/2,-290,0])                  cylinder(r=310,h=32.6,$fn=200);
 116                     translate([193.5/2,-211.9+5,-2])             cylinder(r=223,h=50,$fn=200);
 117                     translate([-320,3,-2]) rotate([0,0,270])     cube([900,900,50]);
 118                     #translate([-22,-1,-1])                       cube([43,16,47]);
 119                     #translate([(end_w-22),-1,-1]) scale([1,1,1]) cube([43,16,47]);
 120                     //translate([192.5/2-23/2+5.9,0,14.5])       cube([11.96,40,20]);
 121
 122 }
 123 }
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