knifeblock.scad

   1 // -*- C -*-
   2
   3 // properties of the knives
   4 nknives = 3;
   5 widths = [15.5, 15.8, 19.0];
   6 handlelenbase = 75;
   7 handlelendelta = [-15, 0, 10];
   8 locations = [-35, 0, 40];
   9 bladew = 5; // 2.5
  10 maxhandledepth = 45;
  11
  12 templatescale = 27.2 / 19.6;
  13
  14 coverlonglen = 130; // xxx
  15 covershortlen = 80; // xxx
  16
  17 // other tuneables
  18 front = 5;
  19 back = 5;
  20 height = 50;
  21 minsidein = 4;
  22 minsideout = 4;
  23
  24 frontbackslop = 0.25;
  25
  26 screwbackdepth = 6.0 - 1.0;
  27 screwdia =       4.0 + 0.5;
  28 screwcsinkdia =  9.8 + 1.0;
  29
  30 screwabove = 15;
  31
  32 coverthick = 2.4;
  33 coverside = coverthick;
  34
  35 covertopwing = 15;
  36 covertopwingbase = 20;
  37 coveredge = 3;
  38
  39 // computed
  40 side = minsidein + screwcsinkdia + minsideout;
  41 totaldepth = front + maxhandledepth + back;
  42
  43 minkx = locations[0] -         widths[0]        /2;
  44 maxkx = locations[nknives-1] + widths[nknives-1]/2;
  45
  46 minx = minkx - side;
  47 maxx = maxkx + side;
  48
  49 module ImportTemplate(w,k,t) {
  50   fn = str("knifeblock-knives-t",k,t,".dxf");
  51   echo(fn);
  52   translate([0,0, -w/2])
  53     linear_extrude(height=w)
  54     scale(templatescale) import(file=fn, convexity=100);
  55 }
  56
  57 module Knife(k){
  58   ImportTemplate(bladew, k,"bl");
  59   hull(){
  60     ImportTemplate(widths[k], k,"hl");
  61     translate([-100,0,0])
  62       ImportTemplate(widths[k], k,"hl");
  63   }
  64 }
  65
  66 module DoKnife(k){
  67   translate([locations[k],0,0]){
  68     rotate([0,90,0])
  69       translate([-(handlelenbase + handlelendelta[k]),0,0])
  70       Knife(k);
  71   }
  72 }
  73
  74 module DoKnives(){
  75   for (k=[0:nknives-1])
  76     DoKnife(k);
  77 }
  78
  79 module ScrewHole(){
  80   translate([0,-50,0])
  81     rotate([-90,0,0])
  82     cylinder(r=screwdia/2, h=150, $fn=40);
  83   translate([0, totaldepth-front - screwbackdepth, 0])
  84     rotate([90,0,0])
  85     cylinder(r=screwcsinkdia/2 / (sqrt(3)/2), h=100, $fn=6);
  86 }
  87
  88 module Block(){
  89   sidemidx = minsideout + screwcsinkdia/2;
  90
  91   difference(){
  92     hull() mirror([0,0,1]) {
  93       translate([minx, 0, 0])
  94         cube([maxx-minx, totaldepth-front, height]);
  95       for (x=[minx + front/2, maxx - front/2])
  96         translate([x, -front/2, 0])
  97         cylinder(r=front/2, h=height, $fn=30);
  98     }
  99     for (x=[minx + sidemidx, maxx - sidemidx]) {
 100       translate([x, 0, -screwabove])
 101         ScrewHole();
 102     }
 103     for (yshift=[-1,1])
 104       translate([0, yshift * frontbackslop, 0])
 105         DoKnives();
 106   }
 107 }
 108
 109 module BlockPrint(){ ////toplevel
 110   rotate([0,0,90])
 111     Block();
 112 }
 113
 114 module CoverTemplate(){
 115   linear_extrude(height=coverthick)
 116     polygon([[minx, 0],
 117              [maxx, 0],
 118              [maxx, coverlonglen],
 119              [maxx - coverside, coverlonglen],
 120              [minx, covershortlen]]);
 121 }
 122
 123 module CoverSide(xpos, len){
 124   translate([xpos, 0 ,0])
 125   rotate([90,0,90])
 126     linear_extrude(height=coverside)
 127       polygon([[0,                      0],
 128                [0,                      totaldepth],
 129                [covertopwing,           totaldepth],
 130                [covertopwingbase,       coverside + coverthick],
 131                [len - covertopwingbase, coverside + coverthick],
 132                [len - covertopwing,     totaldepth],
 133                [len,                    totaldepth],
 134                [len,                    0]]);
 135 //  }
 136 }
 137
 138 module Cover(){
 139   CoverTemplate();
 140   CoverSide(minx,           covershortlen);
 141   CoverSide(maxx-coverside, coverlonglen);
 142 }
 143
 144 module Demo(){ ////toplevel
 145   %Block();
 146   DoKnives();
 147   translate([0,0,-height])
 148     rotate([90,0,0])
 149       Cover();
 150 }
 151
 152 Demo();