// -*- 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;
}
}
-function DoveClip_depth(baseextend) =
- basethick + nomrad*2 + toothheight + baseextend;
-function DoveClip_width() =
- nomrad*2 + jawthick*2 + toothgap;
+function DoveClip_depth() =
+ basethick + nomrad*2 + toothheight;
module DoveClipEnd(baseextend=1, h=7) {
cubex = nomrad*2 + jawthick*2;
}
module DoveClipPair(baseextend=1, h=7) {
- delta = DoveClip_width();
+ 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) {
+module DoveClipPairBase(baseextend=0.1, h=7, count=2) {
delta = nomrad*2 + jawthick;
intrude = nomrad + basethick - basepinclear;
- for (x=[-delta/2,delta/2]) {
- translate([x,0,0])
+ for (i=[0:count-1]) {
+ translate([(i - (count-1)/2) * delta, 0, 0])
DoveClipEnd(baseextend=baseextend, h=h);
}
- translate([-delta, -intrude, 0])
- cube([delta*2, intrude+0.1, h]);
+ translate([-delta * count/2, -intrude, 0])
+ cube([delta * count, intrude+0.1, h]);
}
-module DoveClipPairSane(baseextend=0, h=7) {
+module DoveClipPairSane(baseextend=0, h=7, count=2) {
rotate([0,0,90])
- translate([0, DoveClip_depth(baseextend=0), 0])
- DoveClipPairBase(baseextend=baseextend, h=h);
+ 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);