filamenttrestle.scad

   1 // -*- C -*-
   2
   3 spoolwidth = 80; // fixme needs to be measured
   4 trestleheight = 80; // fixme needs to be checked
   5 trestlebase = 80; // fixme needs to be checked
   6
   7 include <doveclip.scad>
   8
   9 spoolwidthgap = 2;
  10 barrad = 7;
  11 guidewidth = 3;
  12 guiderad = 20;
  13
  14 legw = 12;
  15 plugl = 20;
  16 plugwmin = 3;
  17 plugh = 10;
  18 plugslope = 0.5;
  19 plugwmax = plugwmin + plugh * plugslope * 2;
  20
  21 trestlelegw = 10;
  22 trestlebaseh = 10;
  23 trestleplugd = 1;
  24
  25 topblockthick = 4;
  26 topblockbasedepth = 5;
  27
  28 pinbasew = 5.0;
  29 pinminh = 1.5;
  30 pinmaxh = 4.5;
  31 pindh = 0.50;
  32 pindwidth = 0.75;
  33
  34 pintaperlen = plugwmax * 0.85;
  35 pinstraightlen = 10;
  36
  37 module Plug(d=0){
  38   dw = d;
  39   dh = d;
  40   dhb = d*2;
  41   a = atan(plugslope);
  42   bdy = -dhb;
  43   bdx = dw / cos(a) + bdy * plugslope;
  44   tdy = dh;
  45   tdx = bdx + tdy * plugslope;
  46   translate([-d,0,0]) rotate([90,0,90]) linear_extrude(height=plugl+0.1+d*2){
  47     polygon([[-(plugwmin/2 + bdx),  bdy],
  48              [-(plugwmax/2 + tdx),  plugh + tdy],
  49              [+(plugwmax/2 + tdx),  plugh + tdy],
  50              [+(plugwmin/2 + bdx),  bdy]]);
  51   }
  52 }
  53
  54 module Bar(){ ////toplevel
  55   spoolw = spoolwidth + spoolwidthgap*2;
  56   barz = barrad * 0.5;
  57   biggestw = spoolw + 50;
  58
  59   intersection(){
  60     for (mir=[0,1]) {
  61       mirror([mir,0,0]) {
  62         translate([0,0,barz]) {
  63           translate([-1,0,0])
  64             rotate([0,90,0]) cylinder(r=barrad, h=spoolw/2+2, $fn=30);
  65           translate([spoolw/2,0,0])
  66             rotate([0,90,0]) cylinder(r=guiderad, h=guidewidth, $fn=60);
  67         }
  68         translate([spoolw/2 + guidewidth, 0, 0])
  69           Plug();
  70       }
  71     }
  72     translate([-biggestw/2, -50, 0])
  73       cube([biggestw, 100, 100]);
  74   }
  75 }
  76
  77 module Trestle(){ ////toplevel
  78   legang = atan2(trestlebase/2, trestleheight);
  79   eplen = sqrt(trestleheight*trestleheight + trestlebase*trestlebase*0.25);
  80   topblockw = plugwmax + trestleplugd*2 + topblockthick*2;
  81
  82   pinholebasew = pinbasew + pindwidth*2;
  83   pinholeh =     pinmaxh +  pindh;
  84
  85   difference(){
  86     union(){
  87       for (mir=[0,1]) {
  88         mirror([mir,0,0]) {
  89           rotate([0,0, -90-legang])
  90             ExtenderPillars(length=eplen+trestlelegw,
  91                             width=trestlelegw,
  92                             height=legw,
  93                             baseweb=true);
  94
  95           translate([-trestlebase/2, -trestleheight, 0])
  96             cylinder(r=trestlelegw/2*1.2, h=plugl);
  97         }
  98       }
  99       translate([-topblockw/2, -topblockbasedepth, 0])
 100         cube([topblockw,
 101               topblockbasedepth + plugh + topblockthick
 102               + (pinmaxh - pinminh)*0.6 + pindh,
 103               plugl]);
 104
 105       translate([-trestlebase/2, -trestleheight, 0])
 106         ExtenderPillars(length=trestlebase, width=trestlebaseh*2, height=legw);
 107     }
 108     translate([-300, -trestleheight-50, -1])
 109       cube([600, 50, plugl+2]);
 110
 111     rotate([-90,-90,0])
 112       Plug(d=trestleplugd);
 113
 114     for (rot=[0,180]) {
 115       translate([0,0,plugl/2]) rotate([0,rot,0]) translate([0,0,-plugl/2]) {
 116         translate([-(topblockw*0.25+1),
 117                    plugh + pindh - (pinmaxh - pinminh)*0.75,
 118                    (plugl - pinholebasew*2)/3]) {
 119           translate([0,0,pinholebasew/2]) rotate([-90,0,0]) %Pin();
 120           rotate([0,90,0]) {
 121             linear_extrude(height = topblockw*1.0+2) {
 122               polygon([[-1.0 * pinholebasew, -0.01],
 123                        [-0.5 * pinholebasew, pinholeh],
 124                        [ 0                 , -0.01]]);
 125             }
 126           }
 127         }
 128       }
 129     }
 130   }
 131 }
 132
 133 module Pin(){ ////toplevel
 134   rotate([90,0,90]) {
 135     hull(){
 136       for (mir=[0,1]) {
 137         mirror([mir,0,0]) {
 138           linear_extrude(height=0.1) {
 139             polygon([[-0.01, 0],
 140                      [-0.01, pinminh],
 141                      [pinbasew*0.5*(pinminh/pinmaxh), 0]]);
 142           }
 143           translate([0,0,pintaperlen])
 144             linear_extrude(height=pinstraightlen) {
 145             polygon([[-0.01, 0],
 146                      [-0.01, pinmaxh],
 147                      [pinbasew*0.5, 0]]);
 148           }
 149         }
 150       }
 151     }
 152   }
 153 }
 154
 155 module TestKit(){ ////toplevel
 156   translate([30,0,0]) Pin();
 157   translate([30,30,0]) Pin();
 158   translate([0,40,0]) intersection(){
 159     Trestle();
 160     translate([-50,-10,-1]) cube([100,100,100]);
 161   }
 162   intersection(){
 163     translate([-60,0,0]) Bar();
 164     cube(50,center=true);
 165   }
 166 }
 167
 168 Bar();
 169 //Trestle();
 170 //Pin();
 171 //TestKit();
 172 //Plug(d=1);
 173 //ExtenderPillars(80,12,8, baseweb=true);