filamentspool.scad

   1 // -*- C -*-
   2
   3 fdia=1.75;
   4
   5 slop=0.5;
   6 bigslop=slop*2;
   7
   8 prongthick=5;
   9 prongwidth=5;
  10 ratchetstep=15;
  11 ratchettooth=3;
  12 ratchettoothheight=5;
  13 ratchettoothsmoothr=1;
  14 ratchettoothslope=0.75;
  15 overlap=0.5;
  16 cupbigrad=20;
  17
  18 xstraightmul = 1.75;
  19
  20 propxshift = 0;
  21
  22 doveclipheight = 10;
  23
  24 teethh=3;
  25 teethgapx=4+fdia;
  26
  27 prongstalkxwidth=3;
  28
  29 stalklength=35;
  30 overclipcupgap=5;
  31 overclipdepth=15;
  32 overcliproundr=2.0;
  33 overclipthick=0.5;
  34
  35 wingspoke=3;
  36 wingsize=6;
  37 wingthick=3;
  38
  39 overclipsmaller=-1.0;
  40 overclipbigger=2.0;
  41
  42 armendwallthick=2.5;
  43 armendbasethick=1.2;
  44
  45 ratchetpawl=ratchetstep-ratchettooth-bigslop*2;
  46
  47 include <doveclip.scad>
  48 include <cliphook.scad>
  49 include <filamentteeth.scad>
  50
  51 channelwidth = prongthick + slop;
  52 channeldepth = prongwidth + ratchettoothheight;
  53 totalwidth = armendwallthick*2 + channelwidth;
  54 totalheight = channeldepth + armendbasethick;
  55 stalkwidth = prongwidth + prongstalkxwidth;
  56
  57 module ArmEnd(length=120){
  58   translate([ratchettoothsmoothr, channelwidth/2, -armendbasethick]) {
  59     rotate([0,0,-90])
  60       DoveClipPairBase(h=doveclipheight);
  61   }
  62
  63   difference(){
  64     translate([0, -armendwallthick, -armendbasethick])
  65       cube([length, totalwidth, totalheight]);
  66     translate([-1, 0, 0])
  67       cube([length+2, channelwidth, channeldepth+1]);
  68   }
  69   for (dx = [0 : ratchetstep : length - stalklength]) translate([dx,0,0]) {
  70     translate([ratchettoothsmoothr+0.5, armendwallthick/2, 0]) minkowski(){
  71       rotate([90,0,0])
  72         cylinder($fn=20, r=ratchettoothsmoothr, h=armendwallthick);
  73       multmatrix([      [       1, 0, ratchettoothslope, 0      ],
  74                         [       0,      1,      0,      0       ],
  75                         [       0,      0,      1,      0       ],
  76                         [       0,      0,      0,      1       ]])
  77         cube([ratchettooth - ratchettoothsmoothr*2,
  78               channelwidth, ratchettoothheight]);
  79     }
  80   }
  81 }
  82
  83 module FilamentCupHandle(){
  84   pawlusewidth = ratchetpawl-ratchettoothsmoothr*2;
  85   mirror([0,1,0]) {
  86     cube([stalklength, stalkwidth, prongthick]);
  87     translate([stalklength, stalkwidth/2, 0])
  88       cylinder(r=stalkwidth/2, h=prongthick, $fn=20);
  89     translate([ratchettoothsmoothr, stalkwidth, 0]) {
  90       minkowski(){
  91         cylinder($fn=20,r=ratchettoothsmoothr, h=1);
  92         multmatrix([    [       1, -ratchettoothslope, 0, 0     ],
  93                         [       0,      1,      0,      0       ],
  94                         [       0,      0,      1,      0       ],
  95                         [       0,      0,      0,      1       ]])
  96           cube([pawlusewidth,
  97                 ratchettoothheight - ratchettoothsmoothr,
  98                 prongthick - 1]);
  99       }
 100     }
 101   }
 102 }
 103
 104 module FilamentCupCup(){
 105   xstraight = cupbigrad * xstraightmul;
 106   linear_extrude(height=prongthick) {
 107     FlatArc(0,0, cupbigrad,cupbigrad+prongwidth, 89,271, $fn=80);
 108   }
 109   for (my=[0,1]) mirror([0,my,0]) {
 110     translate([0,cupbigrad,0])
 111       cube([xstraight, prongwidth, prongthick]);
 112   }
 113 }
 114
 115 module FilamentCup() {
 116   FilamentCupHandle();
 117
 118   dx = cupbigrad + prongwidth;
 119   gapy = prongwidth;
 120   dy = cupbigrad + gapy + overclipcupgap;
 121
 122   translate([dx, dy, 0])
 123     FilamentCupCup();
 124   translate([0, -1, 0]);
 125   cube([prongwidth, dy+1, prongthick]);
 126
 127   midrad = cupbigrad + prongwidth/2;
 128
 129   propshift = stalklength - overclipdepth - prongthick + propxshift;
 130   proptaken = propshift;
 131   echo(cupbigrad, dx, midrad, propshift, proptaken);
 132
 133   translate([propshift, -1, 0]) {
 134     // something is wrong with the y calculation
 135     cube([prongwidth,
 136           dy - sqrt(midrad*midrad - proptaken*proptaken) - prongwidth/2,
 137           prongthick]);
 138   }
 139   translate([stalklength + overclipdepth, gapy, 0])
 140     rotate([0,0,-(10 + fdia)])
 141     FilamentTeeth(fdia=fdia, h=teethh);
 142 }
 143
 144 module CupSecuringClipSolid(w,d,h1,h2){
 145   rotate([0,-90,0]) translate([0,-h1/2,-w/2]) linear_extrude(height=w) {
 146     polygon(points=[[0,0], [d,0], [d,h2], [0,h1]]);
 147   }
 148 }
 149
 150 module CupSecuringClipSolidSmooth(xrad=0, xdepth=0){
 151   hbase = totalheight + prongstalkxwidth - overcliproundr*2;
 152   minkowski(){
 153     CupSecuringClipSolid(w=totalwidth,
 154                          d=overclipdepth + xdepth,
 155                          h1=hbase - overclipsmaller,
 156                          h2=hbase + overclipbigger);
 157     cylinder($fn=20, h=0.01, r=overcliproundr+xrad);
 158   }
 159 }
 160
 161 module CupSecuringClip(){
 162   wingswidth = wingspoke*2 + overclipthick*2 + overcliproundr*2 + totalwidth;
 163   difference(){
 164     union(){
 165       CupSecuringClipSolidSmooth(xrad=overclipthick, xdepth=0);
 166       translate([-wingswidth/2, -wingsize/2, 0])
 167         cube([wingswidth, wingsize, wingthick]);
 168     }
 169     translate([0,0,-0.1])
 170       CupSecuringClipSolidSmooth(xrad=0, xdepth=5);
 171   }
 172 }
 173
 174 module ArmDoveClipPin(){
 175   DoveClipPin(h=doveclipheight);
 176 }
 177
 178 //ArmEnd();
 179 //FilamentCup();
 180 //CupSecuringClip();