X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=filamenttrestle.scad;h=c45e8af5472f4e58201ee466c5b970a9019b49aa;hb=74b59b4dd43bffd9a3c3f349b83d0efb4edf57ee;hp=9d9e41f6a54000a16213061ee07c1b10a9804850;hpb=47469cebb4ff8384aae1fb2f7ed2154b8ea08405;p=reprap-play.git

diff --git a/filamenttrestle.scad b/filamenttrestle.scad
index 9d9e41f..c45e8af 100644
--- a/filamenttrestle.scad
+++ b/filamenttrestle.scad
@@ -12,7 +12,8 @@ barradz = 7;
 guidewidth = 3;
 guiderad = 20;
 
-plugl = 12;
+legw = 12;
+plugl = 20;
 plugwmin = 3;
 plugh = 10;
 plugslope = 0.5;
@@ -25,11 +26,14 @@ trestleplugd = 1;
 topblockthick = 4;
 topblockbasedepth = 4;
 
-pinbasew = 3;
-pinminh = 1.0;
-pinmaxh = 3;
-pindh = 1.0;
-pindwidth = 1.0;
+pinbasew = 5.0;
+pinminh = 1.5;
+pinmaxh = 4.0;
+pindh = 0.75;
+pindwidth = 0.75;
+
+pintaperlen = plugwmax * 0.85;
+pinstraightlen = 10;
 
 module Plug(d=0){
   dw = d;
@@ -74,8 +78,8 @@ module Trestle(){
   eplen = sqrt(trestleheight*trestleheight + trestlebase*trestlebase*0.25);
   topblockw = plugwmax + trestleplugd*2 + topblockthick*2;
 
-  pinholebasew = pinbasew + pindwidth;
-  pinholeh =     pinminh +  pindh;
+  pinholebasew = pinbasew + pindwidth*2;
+  pinholeh =     pinmaxh +  pindh;
 
   difference(){
     union(){
@@ -84,7 +88,7 @@ module Trestle(){
 	  rotate([0,0, -90-legang])
 	    ExtenderPillars(length=eplen+trestlelegw,
 			    width=trestlelegw,
-			    height=plugl,
+			    height=legw,
 			    baseweb=true);
 
 	  translate([-trestlebase/2, -trestleheight, 0])
@@ -92,10 +96,13 @@ 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=plugl);
+	ExtenderPillars(length=trestlebase, width=trestlebaseh*2, height=legw);
     }
     translate([-300, -trestleheight-50, -1])
       cube([600, 50, plugl+2]);
@@ -106,12 +113,15 @@ 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]]);
+	    }
 	  }
 	}
       }
@@ -119,8 +129,46 @@ module Trestle(){
   }
 }
 
+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]]);
+	  }
+	}
+      }
+    }
+  }
+}
+
+module TestKit(){
+  translate([30,0,0]) Pin();
+  translate([30,30,0]) Pin();
+  translate([0,40,0]) intersection(){
+    Trestle();
+    translate([-50,-10,-1]) cube([100,100,100]);
+  }
+  intersection(){
+    translate([-60,0,0]) Bar();
+    cube(50,center=true);
+  }
+}
+
 //Bar();
-Trestle();
+//Trestle();
+//Pin();
+
+TestKit();
 
 //Plug(d=1);
 //ExtenderPillars(80,12,8, baseweb=true);