X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=doveclip.scad;h=0536c1c4ecbc0ed498fc748618ea261bba830068;hp=8d632ad05166fc51b711f4f87193e47914060373;hb=f962452af777085bb7d7b1aab8adb60f75eb8066;hpb=b15717badcfb44e8a0ff117823f395a12f30b44d

diff --git a/doveclip.scad b/doveclip.scad
index 8d632ad..0536c1c 100644
--- a/doveclip.scad
+++ b/doveclip.scad
@@ -1,32 +1,59 @@
+// -*- C -*-
+//
+// doveclip.scad
+//
+// 3D design for a fastener suitable for Reprapss
+// Copyright 2012,2016 Ian Jackson
+//
+// This work is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This work is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this work.  If not, see <http://www.gnu.org/licenses/>.
+
+
 toothheight = 1.2;
 webthick = 1.8;
 height = 7;
-pindepth = 10;
+pinlengthfact = 1.2;
 nomrad = height/2 - toothheight;
-minrad = nomrad - 0.5;
-maxrad = nomrad + 0.5;
+minrad = nomrad - 0.75;
+maxrad = nomrad + 0.25;
+jawthick = 1.5;
 
 webgap = 0.4;
+basepinclear = 1.0;
 
 toothgap = webthick + webgap*2;
 basethick = toothheight;
-jawthick = toothheight;
 
-module DoveClipPin() {
-  translate([0,0, height/2]) intersection(){
+module DoveClipPin(h=height) {
+  pinh = h * pinlengthfact;
+  pinheight = nomrad*2 + jawthick*2;
+  translate([0,0, pinheight/2]) intersection(){
     union(){
       for (m=[0,1]) {
-	mirror([0,0,m]) translate([0,0,height/2]) rotate([90,0,0])
-	  cylinder($fn=20, r1=minrad, r2=maxrad, h=pindepth);
+	mirror([0,0,m]) translate([0,0,pinheight/2]) rotate([90,0,0])
+	  cylinder($fn=20, r1=minrad, r2=maxrad, h=pinh);
       }
-      translate([-webthick/2, -pindepth, -height/2-1])
-	cube([webthick, pindepth, height+2]);
+      translate([-webthick/2, -pinh, -pinheight/2-1])
+	cube([webthick, pinh, pinheight+2]);
     }
-    translate([-maxrad-1, -pindepth-1, -height/2])
-      cube([maxrad*2+2, pindepth+2, height]);
+    translate([-maxrad-1, -pinh-1, -pinheight/2])
+      cube([maxrad*2+2, pinh+2, pinheight]);
   }
 }
 
+function DoveClip_depth() =
+  basethick + nomrad*2 + toothheight;
+
 module DoveClipEnd(baseextend=1, h=7) {
   cubex = nomrad*2 + jawthick*2;
   cube0y = -basethick-nomrad*2-toothheight;
@@ -42,8 +69,93 @@ module DoveClipEnd(baseextend=1, h=7) {
 }
 
 module DoveClipPair(baseextend=1, h=7) {
-  delta = nomrad*2 + jawthick*2 + toothgap;
+  delta =  nomrad*2 + jawthick*2 + toothgap;
   for (x=[-delta/2,delta/2])
     translate([x,0,0])
       DoveClipEnd(baseextend=baseextend, h=h);
 }
+
+module DoveClipPairBase(baseextend=0.1, h=7, count=2) {
+  delta = nomrad*2 + jawthick;
+  intrude = nomrad + basethick - basepinclear;
+  for (i=[0:count-1]) {
+    translate([(i - (count-1)/2) * delta, 0, 0])
+      DoveClipEnd(baseextend=baseextend, h=h);
+  }
+  translate([-delta * count/2, -intrude, 0])
+    cube([delta * count, intrude+0.1, h]);
+}
+
+module DoveClipPairSane(baseextend=0, h=7, count=2) {
+  rotate([0,0,90])
+    translate([0, DoveClip_depth(), 0])
+    DoveClipPairBase(baseextend=baseextend, h=h, count=count);
+}
+
+function DoveClipPairSane_width(count=2) =
+  2 * (nomrad + jawthick + ((nomrad*2 + jawthick) * (count-1)/2));
+
+module ExtenderPillar(length, height,
+		      pillarw=3.5, pillarslope=0.75, webthick=1) {
+  pillarr=pillarw/2;
+  d = 0.25;
+
+  intangle = atan(pillarslope);
+  polyjx = sin(intangle)*pillarr;
+  polyjy = cos(intangle)*pillarr;
+  polyex = -tan(intangle+90)*pillarr;
+  webmidy = height/2+d;
+
+  for (xmir=[0,1])
+    translate([0,0,height/2]) mirror([0,0,xmir])
+      translate([0,0,-height/2]) {
+      intersection() {
+	translate([-1, -pillarr-5, 0.01])
+	  cube([length+2, height+pillarr*2+10, height]);
+	mirror([1,0,0]) rotate([0,-90,0])
+	  linear_extrude(height=length) union(){
+	  circle(r=pillarr, $fn=20);
+	  polygon([[polyjx,polyjy-0.1], [polyex, 0],
+		   [polyjx,-(polyjy-0.1)]]);
+	  polygon([[0,-webthick/2], [0,webthick/2],
+		   [webmidy,webthick/2], [webmidy,-webthick/2]]);
+	}
+      }
+    }
+}
+
+module ExtenderPillars(length, width, height,
+		       pillarw=3.5, pillarslope=0.75, webthick=1,
+		       baseweb=false, basewebthick=1) {
+  pilesw = width - pillarw;
+
+  for (ymir=[0,1]) mirror([0,ymir,0]) translate([0,-pilesw/2,0]) {
+      ExtenderPillar(length, height, pillarw, pillarslope, webthick);
+    }
+
+  if (baseweb) {
+    translate([0, -pilesw/2, 0])
+      cube([length, pilesw, basewebthick]);
+  }
+}
+
+module DoveClipExtender(length, ha=7, hb=7, counta=2, countb=2,
+			pillarw=3.5, pillarslope=0.75, webthick=1) {
+
+  mirror([1,0,0])
+    DoveClipPairSane(h=ha, count=counta);
+  translate([length,0,0])
+    DoveClipPairSane(h=hb, count=countb);
+  pillarlen = length - DoveClip_depth() * 2 + 2;
+
+  pilesw = min(DoveClipPairSane_width(counta), DoveClipPairSane_width(countb))
+    - 0.5;
+  pilesh = min(ha, hb) - 0.5;
+
+  translate([DoveClip_depth() - 1, 0, 0])
+    ExtenderPillars(pillarlen, pilesw, pilesh,
+		    pillarw=pillarw, pillarslope=pillarslope,
+		    webthick=webthick);
+}
+
+//DoveClipExtender(length=100, ha=16, hb=20, counta=3, countb=4);