chiark / gitweb /
lemon-stand.scad.pl: adjustments
[reprap-play.git] / doveclip.scad
index 95ae450..0536c1c 100644 (file)
@@ -1,4 +1,23 @@
 // -*- 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;
@@ -76,47 +95,67 @@ module DoveClipPairSane(baseextend=0, h=7, count=2) {
 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) {
-  pillarr=pillarw/2;
 
   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 - pillarr*2;
+    - 0.5;
   pilesh = min(ha, hb) - 0.5;
-  d = 0.25;
-  echo(pilesh);
 
-  intangle = atan(pillarslope);
-  polyjx = sin(intangle)*pillarr;
-  polyjy = cos(intangle)*pillarr;
-  polyex = -tan(intangle+90)*pillarr;
-  webmidy = pilesh/2+d;
-
-  translate([DoveClip_depth() - 1, 0, 0]) {
-    for (ymir=[0,1]) mirror([0,ymir,0]) translate([0,-pilesw/2,0]) {
-       for (xmir=[0,1])
-         translate([0,0,pilesh/2]) mirror([0,0,xmir])
-             translate([0,0,-pilesh/2]) {
-           intersection() {
-             translate([-1, -pillarr-5, 0.01])
-               cube([pillarlen+2, pilesh+pillarr*2+10, pilesw]);
-             mirror([1,0,0]) rotate([0,-90,0])
-               linear_extrude(height=pillarlen) 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]]);
-             }
-           }
-         }
-      }
-  }
+  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);