filamenttrestle.scad

   1 // -*- C -*-
   2
   3 spoolwidth = 80; // fixme needs to be measured
   4 spoolinnerrad = 25; // fixme needs to be checked
   5 spoolouterrad = 60; // fixme needs to be checked
   6
   7 include <doveclip.scad>
   8 include <axlepin.scad>
   9
  10 spoolradclear = 10;
  11 spoolradslop = 2;
  12
  13 spoolinnerslop = 2;
  14 axleslop = 0.5;
  15
  16 axlerad = 7;
  17 barwasherrad = 17;
  18
  19 hubbasethick = 6;
  20 hubmainthick = 20;
  21 hubbaseweb = 2;
  22 hubbasestalkwidth = 6;
  23 hubwalls = 3;
  24 hubbaserad = spoolinnerrad + 15;
  25 hubmainrad = spoolinnerrad - spoolradslop;
  26
  27 legw = 12;
  28 plugl = 20;
  29 plugwmin = 3;
  30 plugh = 10;
  31 plugslope = 0.5;
  32 plugwmax = plugwmin + plugh * plugslope * 2;
  33
  34 trestlelegw = 10;
  35 trestlebaseh = 10;
  36 trestleplugd = 1;
  37
  38 topblockthick = 4;
  39 topblockbasedepth = 5;
  40
  41 pinbasew = 5.0;
  42 pinminh = 1.5;
  43 pinmaxh = 4.5;
  44 pindh = 0.50;
  45 pindwidth = 0.75;
  46
  47 pintaperlen = plugwmax * 0.85;
  48 pinstraightlen = 10;
  49
  50 spoolouterpad = AxlePin_holerad()*2 * 1.5;
  51 spoolbarlen = spoolwidth +
  52   2*(Washer_thick() + hubbasethick + AxlePin_holerad()
  53      + spoolinnerslop + spoolouterpad);
  54   barz = axlerad * 0.5;
  55 axlepin_x = spoolwidth/2 + hubbasethick +
  56   Washer_thick() + spoolinnerslop + AxlePin_holerad()*0.5;
  57
  58 trestleheight = spoolouterrad + spoolradclear - barz;
  59 trestlebase = trestleheight * 1.2;
  60
  61 module Plug(d=0){
  62   dw = d;
  63   dh = d;
  64   dhb = d*2;
  65   a = atan(plugslope);
  66   bdy = -dhb;
  67   bdx = dw / cos(a) + bdy * plugslope;
  68   tdy = dh;
  69   tdx = bdx + tdy * plugslope;
  70   translate([-d,0,0]) rotate([90,0,90]) linear_extrude(height=plugl+0.1+d*2){
  71     polygon([[-(plugwmin/2 + bdx),  bdy],
  72              [-(plugwmax/2 + tdx),  plugh + tdy],
  73              [+(plugwmax/2 + tdx),  plugh + tdy],
  74              [+(plugwmin/2 + bdx),  bdy]]);
  75   }
  76 }
  77
  78 module Bar(){ ////toplevel
  79   spoolw = spoolbarlen;
  80   biggestw = spoolw + 50;
  81
  82   intersection(){
  83     for (mir=[0,1]) {
  84       mirror([mir,0,0]) {
  85         translate([spoolw/2, 0, 0])
  86           Plug();
  87         translate([-1, -50, -50])
  88           cube([spoolw/2+1.1, 100, 100]);
  89       }
  90     }
  91     difference(){
  92       translate([-biggestw/2, -50, 0])
  93         cube([biggestw, 100, 100]);
  94       for (mir=[0,1]) {
  95         mirror([mir,0,0])
  96           translate([axlepin_x, 0, -50])
  97           cylinder(r=AxlePin_holerad(), 100, $fn=15);
  98       }
  99     }
 100     translate([0,0,barz]) {
 101       translate([-100,0,0])
 102         rotate([0,90,0]) cylinder(r=axlerad, h=200, $fn=30);
 103     }
 104   }
 105 }
 106
 107 module FtAxlePin(){ ////toplevel
 108   AxlePin(axlerad, (axlerad + barwasherrad*2)/3 * 2);
 109 }
 110
 111 module AxleWasher(){ ////toplevel
 112   Washer(axlerad, barwasherrad);
 113 }
 114
 115 module Trestle(){ ////toplevel
 116   legang = atan2(trestlebase/2, trestleheight);
 117   eplen = sqrt(trestleheight*trestleheight + trestlebase*trestlebase*0.25);
 118   topblockw = plugwmax + trestleplugd*2 + topblockthick*2;
 119
 120   pinholebasew = pinbasew + pindwidth*2;
 121   pinholeh =     pinmaxh +  pindh;
 122
 123   difference(){
 124     union(){
 125       for (mir=[0,1]) {
 126         mirror([mir,0,0]) {
 127           rotate([0,0, -90-legang])
 128             ExtenderPillars(length=eplen+trestlelegw,
 129                             width=trestlelegw,
 130                             height=legw,
 131                             baseweb=true);
 132
 133           translate([-trestlebase/2, -trestleheight, 0])
 134             cylinder(r=trestlelegw/2*1.2, h=plugl);
 135         }
 136       }
 137       translate([-topblockw/2, -topblockbasedepth, 0])
 138         cube([topblockw,
 139               topblockbasedepth + plugh + topblockthick
 140               + (pinmaxh - pinminh)*0.6 + pindh,
 141               plugl]);
 142
 143       translate([-trestlebase/2, -trestleheight, 0])
 144         ExtenderPillars(length=trestlebase, width=trestlebaseh*2, height=legw);
 145     }
 146     translate([-300, -trestleheight-50, -1])
 147       cube([600, 50, plugl+2]);
 148
 149     rotate([-90,-90,0])
 150       Plug(d=trestleplugd);
 151
 152     for (rot=[0,180]) {
 153       translate([0,0,plugl/2]) rotate([0,rot,0]) translate([0,0,-plugl/2]) {
 154         translate([0,
 155                    plugh + pindh - (pinmaxh - pinminh)*0.75,
 156                    (plugl - pinholebasew*2)/3]) {
 157           translate([-(topblockw*0.25+1), 0, pinholebasew/2])
 158             rotate([-90,0,0]) %Pin();
 159           translate([-(topblockw+1), 0, 0]) {
 160             rotate([0,90,0]) {
 161               linear_extrude(height = topblockw*1.0+2) {
 162                 polygon([[-1.0 * pinholebasew, -0.01],
 163                          [-0.5 * pinholebasew, pinholeh],
 164                          [ 0                 , -0.01]]);
 165               }
 166             }
 167           }
 168         }
 169       }
 170     }
 171   }
 172 }
 173
 174 module Pin(){ ////toplevel
 175   rotate([90,0,90]) {
 176     hull(){
 177       for (mir=[0,1]) {
 178         mirror([mir,0,0]) {
 179           linear_extrude(height=0.1) {
 180             polygon([[-0.01, 0],
 181                      [-0.01, pinminh],
 182                      [pinbasew*0.5*(pinminh/pinmaxh), 0]]);
 183           }
 184           translate([0,0,pintaperlen])
 185             linear_extrude(height=pinstraightlen) {
 186             polygon([[-0.01, 0],
 187                      [-0.01, pinmaxh],
 188                      [pinbasew*0.5, 0]]);
 189           }
 190         }
 191       }
 192     }
 193   }
 194 }
 195
 196 module HubEnd(){ ////toplevel
 197   thick = hubmainthick+hubbasethick;
 198   difference(){
 199     union(){
 200       for (ang=[0 : 60 : 359]) {
 201         rotate([0,0,ang]) {
 202           translate([hubmainrad - hubwalls/2, -hubbasestalkwidth/2, 0])
 203             cube([hubbaserad - (hubmainrad - hubwalls/2),
 204                   hubbasestalkwidth, hubbasethick]);
 205         }
 206       }
 207       cylinder(r=axlerad+hubwalls, h=thick);
 208       cylinder(r=hubmainrad-0.1, h=hubwebthick);
 209       difference(){
 210         cylinder(r=hubmainrad, h=thick, $fn=100);
 211         translate([0,0,-1])
 212           cylinder(r=hubmainrad-hubwalls, h=thick+2);
 213       }
 214       difference(){
 215         cylinder(r=hubbaserad, h=hubbasethick, $fn=50);
 216         translate([0,0,-1])
 217           cylinder(r=hubbaserad-hubwalls, h=hubbasethick+2);
 218       }
 219     }
 220     translate([0,0,-1])
 221       cylinder(r=axlerad+axleslop, h=thick+2, $fn=50);
 222   }
 223 }
 224
 225
 226 module TestKit(){ ////toplevel
 227   translate([30,0,0]) Pin();
 228   translate([30,30,0]) Pin();
 229   translate([0,40,0]) intersection(){
 230     Trestle();
 231     translate([-50,-10,-1]) cube([100,100,100]);
 232   }
 233   intersection(){
 234     translate([-60,0,0]) Bar();
 235     cube(50,center=true);
 236   }
 237 }
 238
 239 module DemoSpool(){
 240   rotate([0,90,0]) translate([0,0,-spoolwidth/2])
 241     difference(){
 242       cylinder(r=spoolouterrad, h=spoolwidth);
 243       translate([0,0,-1]) cylinder(r=spoolinnerrad, h=spoolwidth+2);
 244     }
 245 }
 246
 247 module Demo(){
 248   Bar();
 249   for (mir=[0,1]) {
 250     mirror([mir,0,0]) {
 251       translate([spoolbarlen/2,0,0]) rotate([90,0,90]) Trestle();
 252       translate([spoolwidth/2 + hubbasethick + spoolinnerslop/4, 0, barz])
 253         rotate([0,90,0]) AxleWasher();
 254       translate([axlepin_x, 0, barz]) rotate([90,0,90]) FtAxlePin();
 255     }
 256   }
 257   %translate([0,0,barz]) DemoSpool();
 258 }
 259
 260 //Bar();
 261 //FtAxlePin();
 262 //AxleWasher();
 263 //Trestle();
 264 //Pin();
 265 //TestKit();
 266 //Plug(d=1);
 267 //ExtenderPillars(80,12,8, baseweb=true);
 268 HubEnd();
 269 //Demo();