chiark / gitweb /
filamenttrestle triangular pins tuning etc.
authorIan Jackson <ijackson@chiark.greenend.org.uk>
Thu, 11 Oct 2012 00:34:24 +0000 (01:34 +0100)
committerIan Jackson <ijackson@chiark.greenend.org.uk>
Thu, 11 Oct 2012 00:34:24 +0000 (01:34 +0100)
filamenttrestle.scad

index 0f99442..c7aeafb 100644 (file)
@@ -13,7 +13,7 @@ guidewidth = 3;
 guiderad = 20;
 
 legw = 12;
-plugl = 16;
+plugl = 20;
 plugwmin = 3;
 plugh = 10;
 plugslope = 0.5;
@@ -26,11 +26,14 @@ trestleplugd = 1;
 topblockthick = 4;
 topblockbasedepth = 4;
 
-pinbasew = 3;
+pinbasew = 5.0;
 pinminh = 1.5;
 pinmaxh = 4.0;
-pindh = 1.0;
-pindwidth = 1.0;
+pindh = 0.75;
+pindwidth = 0.75;
+
+pintaperlen = plugwmax * 0.85;
+pinstraightlen = 10;
 
 module Plug(d=0){
   dw = d;
@@ -76,7 +79,7 @@ module Trestle(){
   topblockw = plugwmax + trestleplugd*2 + topblockthick*2;
 
   pinholebasew = pinbasew + pindwidth*2;
-  pinholeh =     pinminh +  pindh;
+  pinholeh =     pinmaxh +  pindh;
 
   difference(){
     union(){
@@ -93,7 +96,10 @@ module Trestle(){
        }
       }
       translate([-topblockw/2, -topblockbasedepth, 0])
-       cube([topblockw, topblockbasedepth + plugh + topblockthick, plugl]);
+       cube([topblockw,
+             topblockbasedepth + plugh + topblockthick
+             + (pinmaxh - pinminh)*0.6 + pindh,
+             plugl]);
 
       translate([-trestlebase/2, -trestleheight, 0])
        ExtenderPillars(length=trestlebase, width=trestlebaseh*2, height=legw);
@@ -107,12 +113,37 @@ module Trestle(){
     for (rot=[0,180]) {
       translate([0,0,plugl/2]) rotate([0,rot,0]) translate([0,0,-plugl/2]) {
        translate([-(topblockw*0.25+1),
-                  plugh + pindh - (pinmaxh - pinminh)/2,
-                  (plugl - pinholebasew*2)/3]) rotate([0,90,0]) {
-         linear_extrude(height = topblockw*1.0+2) {
-           polygon([[-1.0 * pinholebasew, -0.01],
-                    [-0.5 * pinholebasew, pinholeh],
-                    [ 0                 , -0.01]]);
+                  plugh + pindh - (pinmaxh - pinminh)*0.5,
+                  (plugl - pinholebasew*2)/3]) {
+         translate([0,0,pinholebasew/2]) rotate([-90,0,0]) %Pin();
+         rotate([0,90,0]) {
+           linear_extrude(height = topblockw*1.0+2) {
+             polygon([[-1.0 * pinholebasew, -0.01],
+                      [-0.5 * pinholebasew, pinholeh],
+                      [ 0                 , -0.01]]);
+           }
+         }
+       }
+      }
+    }
+  }
+}
+
+module Pin(){
+  rotate([90,0,90]) {
+    hull(){
+      for (mir=[0,1]) {
+       mirror([mir,0,0]) {
+         linear_extrude(height=0.1) {
+           polygon([[-0.01, 0],
+                    [-0.01, pinminh],
+                    [pinbasew*0.5*(pinminh/pinmaxh), 0]]);
+         }
+         translate([0,0,pintaperlen])
+           linear_extrude(height=pinstraightlen) {
+           polygon([[-0.01, 0],
+                    [-0.01, pinmaxh],
+                    [pinbasew*0.5, 0]]);
          }
        }
       }
@@ -122,6 +153,7 @@ module Trestle(){
 
 //Bar();
 Trestle();
+//Pin();
 
 //Plug(d=1);
 //ExtenderPillars(80,12,8, baseweb=true);