chiark / gitweb /
filamenttrestle wip trestle looks good
authorIan Jackson <ijackson@chiark.greenend.org.uk>
Sun, 7 Oct 2012 15:35:22 +0000 (16:35 +0100)
committerIan Jackson <ijackson@chiark.greenend.org.uk>
Sun, 7 Oct 2012 15:35:22 +0000 (16:35 +0100)
filamenttrestle.scad

index 3b2c0af..5b5e724 100644 (file)
@@ -1,6 +1,8 @@
 // -*- C -*-
 
 spoolwidth = 80; // fixme needs to be measured
+trestleheight = 80; // fixme needs to be checked
+trestlebase = 80; // fixme needs to be checked
 
 include <doveclip.scad>
 
@@ -16,18 +18,25 @@ plugh = 10;
 plugslope = 0.5;
 plugwmax = plugwmin + plugh * plugslope * 2;
 
+trestlelegw = 10;
+trestlebaseh = 10;
+trestleplugd = 1;
+
+topcylthick = 3;
+topcylbasedepth = 7;
+
 module Plug(d=0){
   a = atan(plugslope);
   tdx = d * cos(a);
   tdy = d * sin(a);
   bdx = d / cos(a);
-  rotate([90,0,90]) linear_extrude(height=plugl+0.1){
+  translate([-d,0,0]) rotate([90,0,90]) linear_extrude(height=plugl+0.1+d*2){
     polygon([[-(plugwmax/2 + bdx),  0],
             [-(plugwmin/2 + tdx),  plugh + tdy],
             [+(plugwmin/2 + tdx),  plugh + tdy],
             [+(plugwmax/2 + bdx),  0]]);
   }
-  translate([plugl + DoveClip_depth()*0.7, 0, 0])
+  translate([plugl + DoveClip_depth()*0.7 + d, 0, 0])
     DoveClipPairSane(count=1, h=plugh-0.1);
 }
 
@@ -54,5 +63,44 @@ module Bar(){
   }
 }
 
-Bar();
+module Trestle(){
+  legang = atan2(trestlebase/2, trestleheight);
+  eplen = sqrt(trestleheight*trestleheight + trestlebase*trestlebase*0.25);
+  topcylr = max(plugwmax/2,
+               trestlelegw/2,
+               sqrt(plugwmin*2/4 + plugh*plugh)
+               ) + topcylthick + trestleplugd;
+
+  difference(){
+    union(){
+      for (mir=[0,1]) {
+       mirror([mir,0,0]) {
+         rotate([0,0, -90-legang])
+           ExtenderPillars(length=eplen+trestlelegw,
+                           width=trestlelegw,
+                           height=plugl);
+
+         translate([-trestlebase/2, -trestleheight, 0])
+           cylinder(r=trestlelegw/2*1.2, h=plugl);
+       }
+      }
+      intersection(){
+       cylinder(r=topcylr, h=plugl);
+       translate([-50, -topcylbasedepth, -1])
+         cube([100, 50, plugl+2]);
+      }
+
+      translate([-trestlebase/2, -trestleheight, 0])
+       ExtenderPillars(length=trestlebase, width=trestlebaseh*2, height=plugl);
+    }
+    translate([-300, -trestleheight-50, -1])
+      cube([600, 50, plugl+2]);
+
+    rotate([-90,-90,0])
+      Plug(d=trestleplugd);
+  }
+}
+
+//Bar();
 //Plug(d=1);
+Trestle();