X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=knifeblock.scad;h=c1f1869f4b1a07e9a777f9077b0274ccc7478a63;hp=7e03782c58da25e51faf8e176c796fd4ed490eb1;hb=b0ff0b516641f6de90ffc4710d40bed2ae727aab;hpb=93308202b1f26667a27286e853924b945e77b643

diff --git a/knifeblock.scad b/knifeblock.scad
index 7e03782..c1f1869 100644
--- a/knifeblock.scad
+++ b/knifeblock.scad
@@ -5,7 +5,7 @@ nknives = 3;
 widths = [15.5, 15.8, 19.0];
 handlelenbase = 75;
 handlelendelta = [-15, 0, 10];
-locations = [-35, 0, 40];
+locations = [-35, 0, 37];
 bladew = 5; // 2.5
 maxhandledepth = 45;
 
@@ -23,6 +23,8 @@ minsideout = 4;
 
 frontbackslop = 0.25;
 
+knifewidthslop = 2.0;
+
 screwbackdepth = 6.0 - 1.0;
 screwdia =       4.0 + 0.5;
 screwcsinkdia =  9.8 + 1.0;
@@ -36,6 +38,17 @@ covertopwing = 15;
 covertopwingbase = 20;
 coveredge = 3;
 
+holesize = 12.5;
+holestrut = 7;
+holeedge = 4;
+
+holeoffx = 0.33;
+holeoffy = 0.23;
+
+indentdepth = 1;
+indentoutersize = holesize + 2.15;
+indentinnersize = indentoutersize - indentdepth * 3.0;
+
 pegstem = 3.5;
 peghead = 10;
 pegstemheight = 2;
@@ -43,24 +56,29 @@ pegheight = 9;
 peglen = 12;
 
 recessblockwidth = peghead + pegstem*3;
-recessblockheight = peglen + pegstem*1.5;
+recessblockheight = peglen/2 + pegstem*1.5;
 
 pegsloph = 0.5;
 pegslopv = 0.5;
 pegslopl = 0.5;
 
-pegdepthproportion = 0.67;
+pegdepthproportion = 0.80;
 
 // computed
+
+function width(k) = widths[k] + knifewidthslop;
+
 side = minsidein + screwcsinkdia + minsideout;
 totaldepth = front + maxhandledepth + back;
 
-minkx = locations[0] -         widths[0]        /2;
-maxkx = locations[nknives-1] + widths[nknives-1]/2;
+minkx = locations[0] -         width(0)        /2;
+maxkx = locations[nknives-1] + width(nknives-1)/2;
 
 minx = minkx - side;
 maxx = maxkx + side;
 
+holepitch = holesize+holestrut;
+
 pegrecess = pegdepthproportion*totaldepth - 0.5*peglen;
 
 module ImportTemplate(w,k,t) {
@@ -74,9 +92,9 @@ module ImportTemplate(w,k,t) {
 module Knife(k){
   ImportTemplate(bladew, k,"bl");
   hull(){
-    ImportTemplate(widths[k], k,"hl");
+    ImportTemplate(width(k), k,"hl");
     translate([-100,0,0])
-      ImportTemplate(widths[k], k,"hl");
+      ImportTemplate(width(k), k,"hl");
   }
 }
 
@@ -102,14 +120,14 @@ module ScrewHole(){
     cylinder(r=screwcsinkdia/2 / (sqrt(3)/2), h=100, $fn=6);
 }
 
-module PegTemplate(){
+module PegTemplate(apex){
   for (mx=[0,1]) for (my=[0,1]) {
       mirror([mx,0,0]) mirror([0,my,0])
 	polygon([[-0.1,      -0.1],
 		 [pegstem/2, -0.1],
 		 [pegstem/2, pegstemheight/2],
 		 [peghead/2, pegheight    /2],
-		 [-0.1,      pegheight    /2]]);
+		 [-0.1,      pegheight    /2 + apex]]);
     }
 }
 
@@ -119,9 +137,21 @@ module AtSides(){
 }
 
 module BlockPegSlot(){
-  translate([recessblockwidth/2, pegrecess - 0.5*peglen, -height]){
+  translate([recessblockwidth/2, pegrecess - peglen, -height]){
     rotate([-90,0,0]) linear_extrude(height=totaldepth){
-      PegTemplate();
+      PegTemplate(peghead/2 * 1.2);
+    }
+  }
+}
+
+module DecorativeIndents(){
+  translate([0, -front, 0])
+  rotate([90,0,0])
+  HexGrid(-height, 0, minx,maxx) {
+    hull(){
+      translate([0, 0, -indentdepth])
+	cylinder(r=indentinnersize/2, h=indentdepth, $fn=40);
+      cylinder(r=indentoutersize/2, h=indentdepth, $fn=40);
     }
   }
 }
@@ -130,12 +160,9 @@ module Block(){
   sidemidx = minsideout + screwcsinkdia/2;
 
   difference(){
-    hull() mirror([0,0,1]) {
-      translate([minx, 0, 0])
-	cube([maxx-minx, totaldepth-front, height]);
-      for (x=[minx + front/2, maxx - front/2])
-	translate([x, -front/2, 0])
-	cylinder(r=front/2, h=height, $fn=30);
+    mirror([0,0,1]) {
+      translate([minx, -front, 0])
+	cube([maxx-minx, totaldepth, height]);
     }
     for (x=[minx + sidemidx, maxx - sidemidx]) {
       translate([x, 0, -screwabove])
@@ -145,6 +172,7 @@ module Block(){
       translate([0, yshift * frontbackslop, 0])
 	DoKnives();
     AtSides() { BlockPegSlot(); BlockPegSlot(); }
+    DecorativeIndents();
   }
 }
 
@@ -157,9 +185,9 @@ module CoverTemplate(){
   linear_extrude(height=coverthick)
     polygon([[minx, 0],
 	     [maxx, 0],
-	     [maxx, coverlonglen],
-	     [maxx - coverside, coverlonglen],
-	     [minx, covershortlen]]);
+	     [maxx, coverlonglen+0.1],
+	     [maxx - coverside, coverlonglen+0.1],
+	     [minx, covershortlen+0.1]]);
 }
 
 module CoverSide(len){
@@ -186,10 +214,10 @@ module Peg(){
   rotate([90,0,0]) {
     linear_extrude(height=peglen-pegslopl) {
       intersection(){
-	translate([-dx,-dy,0]) PegTemplate();
-	translate([-dx,+dy,0]) PegTemplate();
-	translate([+dx,+dy,0]) PegTemplate();
-	translate([+dx,-dy,0]) PegTemplate();
+	translate([-dx,-dy,0]) PegTemplate(0);
+	translate([-dx,+dy,0]) PegTemplate(0);
+	translate([+dx,+dy,0]) PegTemplate(0);
+	translate([+dx,-dy,0]) PegTemplate(0);
       }
     }
   }
@@ -198,15 +226,64 @@ module Peg(){
 module CoverPegSlot(coverlen){
   translate([recessblockwidth/2, 0, -1]){
     linear_extrude(height= 1 + pegrecess + 0.5*peglen){
-      PegTemplate();
+      PegTemplate(0);
     }
   }
 }
 
+module HolesScope(){
+  intersection_for (dx=[-1,+1]) {
+    intersection_for (dy=[-1,+1]) {
+      translate([dx * holeedge, dy * holeedge, -5])
+	scale([1,1,10])
+	CoverTemplate();
+    }
+  }
+}
+
+module HexGrid(xa,xb,ya,yb) {
+  imin = floor(xa / holepitch);
+  imax =  ceil(xb / holepitch);
+  jmin = floor(ya / (sqrt(3)*holepitch));
+  jmax =  ceil(yb / (sqrt(3)*holepitch));
+  echo("HexGrid ",imin,imax,jmin,jmax);
+  for (i=[imin:imax]) {
+    for (j=[jmin:jmax]) {
+      translate([(j * sqrt(3) + holeoffx) * holepitch,
+		 (i +     0.5 + holeoffy) * holepitch,
+		 0]) {
+	child();
+	translate([sqrt(3)/2 * holepitch, -0.5 * holepitch, 0])
+	  child();
+      }
+    }
+  }
+}
+
+module Hole(){
+  cylinder(r=holesize/2, h=40, $fn=40);
+}
+
+module Holes(){
+  intersection(){
+    translate([0, 0, -20])
+      HexGrid(0, coverlonglen, minx, maxx)
+      Hole();
+    HolesScope();
+  }
+}
+
+module CoverCover(){
+  difference(){
+    CoverTemplate();
+    Holes();
+  }
+}
+
 module Cover(){
   difference(){
     union(){
-      CoverTemplate();
+      CoverCover();
       AtSides() { CoverSide(covershortlen); CoverSide(coverlonglen); }
     }
     AtSides() { CoverPegSlot(); CoverPegSlot(); }
@@ -219,12 +296,51 @@ module CoverAligned(){
     Cover();
 }
 
+module DemoPeg(){
+  translate([recessblockwidth/2, pegrecess, -height])
+    Peg();
+}
+
 module Demo(){ ////toplevel
   %Block();
   DoKnives();
   color([0,0,1]) CoverAligned();
+  color([1,0,0]) AtSides() { DemoPeg(); DemoPeg(); }
+}
+
+module Pegs(){ ////toplevel
+  Peg();
+  translate([-peghead-3, 0,0]) Peg();
 }
 
-Demo();
+module CoverParts(){ ////toplevel
+  Cover();
+  translate([0, coverlonglen, pegheight/2-pegslopv])
+    Pegs();
+}
+
+module FrontDemo(){ ////toplevel
+  color([1,0,1]) Block();
+  color([1,0,1]) CoverAligned();
+  color([0,0,0]) DoKnives();
+}
+
+module BlockFrontTest(){ ////toplevel
+  intersection(){
+    Block();
+    translate([minx-10, -front-10, -height-10]) {
+      cube([75,14,35]);
+      cube([75,25,13]);
+    }
+  }
+}
+
+//Block();
+//Demo();
 //Cover();
+//CoverParts();
 //Peg();
+//Cover();
+//Holes();
+//%CoverTemplate();
+//Pegs();