X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=knifeblock.scad;h=6d7e96a5a1a355607cccd6cfeda4465013407317;hb=65d1fbff98e91c996b7c27d8cbea3c7010952f5b;hp=efe3b3b714a978d13fa1191f954f7d592cfb6689;hpb=58673dbf6777842342f4dc8ad0dc219403cbba09;p=reprap-play.git

diff --git a/knifeblock.scad b/knifeblock.scad
index efe3b3b..6d7e96a 100644
--- a/knifeblock.scad
+++ b/knifeblock.scad
@@ -1,19 +1,192 @@
 // -*- C -*-
-//import(file="t.dxf");
 
-module ImportTemplate(k,t) {
-  import(file=str("knifeblock-knives-t",k,t,".dxf"), convexity=3);
+// properties of the knives
+nknives = 3;
+widths = [15.5, 15.8, 19.0];
+handlelenbase = 75;
+handlelendelta = [-15, 0, 10];
+locations = [-35, 0, 40];
+bladew = 5; // 2.5
+maxhandledepth = 45;
+
+templatescale = 27.2 / 19.6;
+
+coverlonglen = 120; // xxx
+covershortlen = 70; // xxx
+
+// other tuneables
+front = 5;
+back = 5;
+height = 50;
+minsidein = 4;
+minsideout = 4;
+
+frontbackslop = 0.25;
+
+screwbackdepth = 6.0 - 1.0;
+screwdia =       4.0 + 0.5;
+screwcsinkdia =  9.8 + 1.0;
+
+screwabove = 15;
+
+coverthick = 2.4;
+coverside = coverthick;
+
+covertopwing = 15;
+covertopwingbase = 20;
+coveredge = 3;
+
+pegstem = 3.5;
+peghead = 10;
+pegstemheight = 2;
+pegheight = 9;
+peglen = 12;
+
+pegslop = 0.5;
+
+// computed
+side = minsidein + screwcsinkdia + minsideout;
+totaldepth = front + maxhandledepth + back;
+
+minkx = locations[0] -         widths[0]        /2;
+maxkx = locations[nknives-1] + widths[nknives-1]/2;
+
+minx = minkx - side;
+maxx = maxkx + side;
+
+module ImportTemplate(w,k,t) {
+  fn = str("knifeblock-knives-t",k,t,".dxf");
+  echo(fn);
+  translate([0,0, -w/2])
+    linear_extrude(height=w)
+    scale(templatescale) import(file=fn, convexity=100);
 }
 
 module Knife(k){
-  translate([0,50*k,0]){
-    ImportTemplate(k,"b");
-    translate([0,0,10])
-      ImportTemplate(k,"h");
+  ImportTemplate(bladew, k,"bl");
+  hull(){
+    ImportTemplate(widths[k], k,"hl");
+    translate([-100,0,0])
+      ImportTemplate(widths[k], k,"hl");
+  }
+}
+
+module DoKnife(k){
+  translate([locations[k],0,0]){
+    rotate([0,90,0])
+      translate([-(handlelenbase + handlelendelta[k]),0,0])
+      Knife(k);
   }
 }
 
-Knife(0);
-Knife(1);
-Knife(2);
-//import(file="t.dxf",convexity=4);
+module DoKnives(){
+  for (k=[0:nknives-1])
+    DoKnife(k);
+}
+
+module ScrewHole(){
+  translate([0,-50,0])
+    rotate([-90,0,0])
+    cylinder(r=screwdia/2, h=150, $fn=40);
+  translate([0, totaldepth-front - screwbackdepth, 0])
+    rotate([90,0,0])
+    cylinder(r=screwcsinkdia/2 / (sqrt(3)/2), h=100, $fn=6);
+}
+
+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);
+    }
+    for (x=[minx + sidemidx, maxx - sidemidx]) {
+      translate([x, 0, -screwabove])
+	ScrewHole();
+    }
+    for (yshift=[-1,1])
+      translate([0, yshift * frontbackslop, 0])
+	DoKnives();
+  }
+}
+
+module BlockPrint(){ ////toplevel
+  rotate([0,0,90])
+    Block();
+}
+
+module CoverTemplate(){
+  linear_extrude(height=coverthick)
+    polygon([[minx, 0],
+	     [maxx, 0],
+	     [maxx, coverlonglen],
+	     [maxx - coverside, coverlonglen],
+	     [minx, covershortlen]]);
+}
+
+module CoverSide(xpos, len){
+  translate([xpos, 0 ,0]) {
+    rotate([90,0,90])
+      linear_extrude(height=coverside)
+      polygon([[0,                      0],
+	       [0,                      totaldepth],
+	       [covertopwing,           totaldepth],
+	       [covertopwingbase,       coverside + coverthick],
+	       [len - covertopwingbase, coverside + coverthick],
+	       [len - covertopwing,     totaldepth],
+	       [len,                    totaldepth],
+	       [len,                    0]]);
+  }
+}
+
+module PegTemplate(){
+  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]]);
+    }
+}
+
+module Peg(){
+  echo("peg angle slope (must be <1)",
+       (peghead-pegstem)/(pegheight-pegstemheight));
+  d = pegslop;
+  rotate([90,0,0]) {
+    linear_extrude(height=peglen) {
+      intersection(){
+	translate([-d,-d,0]) PegTemplate();
+	translate([-d,+d,0]) PegTemplate();
+	translate([+d,+d,0]) PegTemplate();
+	translate([+d,-d,0]) PegTemplate();
+      }
+    }
+  }
+}
+
+module Cover(){
+  CoverTemplate();
+  CoverSide(minx,           covershortlen);
+  mirror([1,0,0]) CoverSide(-maxx, coverlonglen);
+}
+
+module CoverAligned(){
+  translate([0,-front,-height])
+    rotate([-90,0,0])
+    Cover();
+}
+
+module Demo(){ ////toplevel
+  %Block();
+  DoKnives();
+  color([0,0,1]) CoverAligned();
+}
+
+Demo();
+//Cover();