filamenttrestle.scad

   1 // -*- C -*-
   2
   3 spoolinnerdia = 32;
   4 spoolwidth = 88.0;
   5 spoolinnerrad = (spoolinnerdia - 0.2) / 2;
   6 spoolouterrad = spoolinnerrad + 61.5;
   7
   8 include <doveclip.scad>
   9 include <axlepin.scad>
  10
  11 spoolradclear = 10;
  12 spoolradslop = 2;
  13
  14 spoolinnerslop = 3;
  15 axleslop = 0.5;
  16
  17 axlerad = 7;
  18 barwasherrad = 17;
  19
  20 hubbasethick = 4;
  21 hubmainthick = 15;
  22 hubbaseweb = 1.2;
  23 hubbasestalkwidth = 4;
  24 hubwalls = 2.5;
  25 hubpillarw = 4;
  26 hubbaserad = spoolinnerrad + 10;
  27 hubmainrad = spoolinnerrad - spoolradslop;
  28
  29 legw = 12;
  30 plugl = 20;
  31 plugwmin = 3;
  32 plugh = 10;
  33 plugslope = 0.5;
  34 plugwmax = plugwmin + plugh * plugslope * 2;
  35
  36 trestlefoot = 15;
  37
  38 trestlelegw = 10;
  39 trestlebaseh = 10;
  40 trestleplugd = 1;
  41
  42 topblockthick = 3;
  43 topblockbasedepth = 5;
  44
  45 pinbasew = 4.0;
  46 pinminh = 1.0;
  47 pinmaxh = 3.5;
  48 pindh = 1.75;
  49 pindwidth = 1.75;
  50
  51 pintaperlen = 20;
  52 pinstraightlen = 30-pintaperlen;
  53
  54 spoolouterpad = AxlePin_holerad()*2 * 1.5;
  55 spoolbarlen = spoolwidth +
  56   2*(Washer_thick() + hubbasethick + AxlePin_holerad()
  57      + spoolinnerslop + spoolouterpad);
  58   barz = axlerad * 0.5;
  59 axlepin_x = spoolwidth/2 + hubbasethick +
  60   Washer_thick() + spoolinnerslop + AxlePin_holerad()*0.5;
  61
  62 trestleheight = spoolouterrad + spoolradclear - barz;
  63 trestlebase = trestleheight * 1.2;
  64
  65 module Plug(d=0){
  66   dw = d;
  67   dh = d;
  68   dhb = d*2;
  69   a = atan(plugslope);
  70   bdy = -dhb;
  71   bdx = dw / cos(a) + bdy * plugslope;
  72   tdy = dh;
  73   tdx = bdx + tdy * plugslope;
  74   translate([-d,0,0]) rotate([90,0,90]) linear_extrude(height=plugl+0.1+d*2){
  75     polygon([[-(plugwmin/2 + bdx),  bdy],
  76              [-(plugwmax/2 + tdx),  plugh + tdy],
  77              [+(plugwmax/2 + tdx),  plugh + tdy],
  78              [+(plugwmin/2 + bdx),  bdy]]);
  79   }
  80 }
  81
  82 module Bar(){ ////toplevel
  83   spoolw = spoolbarlen;
  84   biggestw = spoolw + 50;
  85
  86   intersection(){
  87     for (mir=[0,1]) {
  88       mirror([mir,0,0]) {
  89         translate([spoolw/2, 0, 0])
  90           Plug();
  91         translate([-1, -50, -50])
  92           cube([spoolw/2+1.1, 100, 100]);
  93       }
  94     }
  95     difference(){
  96       translate([-biggestw/2, -50, 0])
  97         cube([biggestw, 100, 100]);
  98       for (mir=[0,1]) {
  99         mirror([mir,0,0])
 100           translate([axlepin_x, 0, -50])
 101           cylinder(r=AxlePin_holerad(), 100, $fn=15);
 102       }
 103     }
 104     translate([0,0,barz]) {
 105       translate([-100,0,0])
 106         rotate([0,90,0]) cylinder(r=axlerad, h=200, $fn=60);
 107     }
 108   }
 109 }
 110
 111 module FtAxlePin(){ ////toplevel
 112   AxlePin(axlerad, (axlerad + barwasherrad*2)/3 * 2);
 113 }
 114
 115 module AxleWasher(){ ////toplevel
 116   Washer(axlerad, barwasherrad);
 117 }
 118
 119 module Trestle(){ ////toplevel
 120   legang = atan2(trestlebase/2, trestleheight);
 121   eplen = sqrt(trestleheight*trestleheight + trestlebase*trestlebase*0.25);
 122   topblockw = plugwmax + trestleplugd*2 + topblockthick*2;
 123
 124   pinholebasew = pinbasew + pindwidth*2;
 125   pinholeh =     pinmaxh +  pindh;
 126
 127   difference(){
 128     union(){
 129       for (mir=[0,1]) {
 130         mirror([mir,0,0]) {
 131           rotate([0,0, -90-legang])
 132             ExtenderPillars(length=eplen+trestlelegw,
 133                             width=trestlelegw,
 134                             height=legw,
 135                             baseweb=true);
 136
 137           translate([-trestlebase/2, -trestleheight, 0])
 138             cylinder(r=trestlelegw/2*1.2, h=trestlefoot);
 139         }
 140       }
 141       translate([-topblockw/2, -topblockbasedepth, 0])
 142         cube([topblockw,
 143               topblockbasedepth + plugh + topblockthick
 144               + (pinmaxh - pinminh)*0.5,
 145               plugl]);
 146
 147       translate([-trestlebase/2, -trestleheight, 0])
 148         ExtenderPillars(length=trestlebase, width=trestlebaseh*2, height=legw);
 149     }
 150     translate([-300, -trestleheight-50, -1])
 151       cube([600, 50, 52]);
 152
 153     rotate([-90,-90,0])
 154       Plug(d=trestleplugd);
 155
 156     for (rot=[0,180]) {
 157       translate([0,0,plugl/2]) rotate([0,rot,0]) translate([0,0,-plugl/2]) {
 158         translate([0,
 159                    plugh - (pinmaxh - pinminh)*1.00,
 160                    (plugl - pinholebasew*2)/3]) {
 161           translate([-(topblockw*0.25+1), 0, pinholebasew/2])
 162             rotate([-90,0,0]) %Pin();
 163           translate([-(topblockw+1), 0, 0]) {
 164             rotate([0,90,0]) {
 165               linear_extrude(height = topblockw*2.0+2) {
 166                 polygon([[-1.0 * pinholebasew, -0.01],
 167                          [-0.5 * pinholebasew, pinholeh],
 168                          [ 0                 , -0.01]]);
 169               }
 170             }
 171           }
 172         }
 173       }
 174     }
 175   }
 176 }
 177
 178 module Pin(){ ////toplevel
 179   rotate([90,0,90]) {
 180     hull(){
 181       for (mir=[0,1]) {
 182         mirror([mir,0,0]) {
 183           linear_extrude(height=0.1) {
 184             polygon([[-0.01, 0],
 185                      [-0.01, pinminh],
 186                      [pinbasew*0.5*(pinminh/pinmaxh), 0]]);
 187           }
 188           translate([0,0,pintaperlen])
 189             linear_extrude(height=pinstraightlen) {
 190             polygon([[-0.01, 0],
 191                      [-0.01, pinmaxh],
 192                      [pinbasew*0.5, 0]]);
 193           }
 194         }
 195       }
 196     }
 197   }
 198 }
 199
 200 module HubEnd(){ ////toplevel
 201   thick = hubmainthick+hubbasethick;
 202   difference(){
 203     union(){
 204       for (ang=[0 : 60 : 359]) {
 205         rotate([0,0,ang]) {
 206           translate([hubmainrad - hubwalls/2, -hubbasestalkwidth/2, 0])
 207             cube([hubbaserad - (hubmainrad - hubwalls/2),
 208                   hubbasestalkwidth, hubbasethick]);
 209           ExtenderPillar(length = hubmainrad-hubwalls/2,
 210                          height = hubbasethick + hubmainthick,
 211                          pillarw = hubpillarw);
 212         }
 213       }
 214       cylinder(r=axlerad+hubwalls, h=thick);
 215       cylinder(r=hubmainrad-0.1, h=hubbaseweb);
 216       difference(){
 217         cylinder(r=hubmainrad, h=thick, $fn=100);
 218         translate([0,0,-1])
 219           cylinder(r=hubmainrad-hubwalls, h=thick+2);
 220       }
 221       difference(){
 222         cylinder(r=hubbaserad, h=hubbasethick, $fn=50);
 223         translate([0,0,-1])
 224           cylinder(r=hubbaserad-hubwalls, h=hubbasethick+2);
 225       }
 226     }
 227     translate([0,0,-1])
 228       cylinder(r=axlerad+axleslop, h=thick+2, $fn=50);
 229   }
 230 }
 231
 232
 233 module TestKit(){ ////toplevel
 234   translate([60,0,0]) mirror([1,0,0]) Pin();
 235   translate([60,15,0]) mirror([1,0,0]) Pin();
 236   translate([0,40,0]) intersection(){
 237     Trestle();
 238     translate([-50,-10,-1]) cube([100,100,100]);
 239   }
 240   intersection(){
 241     translate([-60,10,0]) Bar();
 242     cube(50,center=true);
 243   }
 244   %translate([50,40, AxlePin_zoffset()]) FtAxlePin();
 245   %translate([0,-20,0]) AxleWasher();
 246 }
 247
 248 module DemoSpool(){
 249   rotate([0,90,0]) translate([0,0,-spoolwidth/2])
 250     difference(){
 251       cylinder(r=spoolouterrad, h=spoolwidth);
 252       translate([0,0,-1]) cylinder(r=spoolinnerrad, h=spoolwidth+2);
 253     }
 254 }
 255
 256 module Demo(){ ////toplevel
 257   color("blue") Bar();
 258   for (mir=[0,1]) {
 259     mirror([mir,0,0]) {
 260       color("red") translate([spoolbarlen/2,0,0])
 261         rotate([90,0,90]) Trestle();
 262       color("orange")
 263         translate([spoolwidth/2 + hubbasethick + spoolinnerslop*2/3, 0, barz])
 264         rotate([0,90,0]) AxleWasher();
 265       color("orange") translate([axlepin_x, 0, barz])
 266         rotate([90,0,90]) FtAxlePin();
 267       color("cyan")
 268         translate([spoolwidth/2 + hubbasethick + spoolinnerslop*1/3, 0, barz])
 269         rotate([0,-90,0]) HubEnd();
 270     }
 271   }
 272   %translate([0,0,barz]) DemoSpool();
 273 }
 274
 275 //Bar();
 276 //FtAxlePin();
 277 //AxleWasher();
 278 //Trestle();
 279 //Pin();
 280 //TestKit();
 281 //Plug(d=1);
 282 //ExtenderPillars(80,12,8, baseweb=true);
 283 //HubEnd();
 284 //Demo();