X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=filamenttrestle.scad;h=8d17cf69f2f8a7dc1203364c7975898126937bf8;hp=b546360b4f6ba68d296ad07537a6df5cb292b46d;hb=e78af9df9bb6c435a8595a1a184b8090e7b90911;hpb=a889fbee7e5974de5e92d61222dad6fd633f1b6b

diff --git a/filamenttrestle.scad b/filamenttrestle.scad
index b546360..8d17cf6 100644
--- a/filamenttrestle.scad
+++ b/filamenttrestle.scad
@@ -5,14 +5,14 @@ trestleheight = 80; // fixme needs to be checked
 trestlebase = 80; // fixme needs to be checked
 
 include <doveclip.scad>
+include <axlepin.scad>
 
 spoolwidthgap = 2;
-barrady = 5;
-barradz = 7;
-guidewidth = 3;
-guiderad = 20;
+barrad = 7;
+barwasherrad = 20;
 
-plugl = 12;
+legw = 12;
+plugl = 20;
 plugwmin = 3;
 plugh = 10;
 plugslope = 0.5;
@@ -22,60 +22,69 @@ trestlelegw = 10;
 trestlebaseh = 10;
 trestleplugd = 1;
 
-topblockthick = 3;
-topblockbasedepth = 4;
+topblockthick = 4;
+topblockbasedepth = 5;
 
-pinbasew = 3;
-pinminh = 1.0;
-pinmaxh = 3;
-pindh = 1.0;
-pindwidth = 1.0;
+pinbasew = 5.0;
+pinminh = 1.5;
+pinmaxh = 4.5;
+pindh = 0.50;
+pindwidth = 0.75;
+
+pintaperlen = plugwmax * 0.85;
+pinstraightlen = 10;
 
 module Plug(d=0){
   dw = d;
   dh = d;
+  dhb = d*2;
   a = atan(plugslope);
-  bdx = dw / cos(a);
+  bdy = -dhb;
+  bdx = dw / cos(a) + bdy * plugslope;
   tdy = dh;
-  tdx = bdx + dh * plugslope;
+  tdx = bdx + tdy * plugslope;
   translate([-d,0,0]) rotate([90,0,90]) linear_extrude(height=plugl+0.1+d*2){
-    polygon([[-(plugwmin/2 + bdx),  0],
+    polygon([[-(plugwmin/2 + bdx),  bdy],
 	     [-(plugwmax/2 + tdx),  plugh + tdy],
 	     [+(plugwmax/2 + tdx),  plugh + tdy],
-	     [+(plugwmin/2 + bdx),  0]]);
+	     [+(plugwmin/2 + bdx),  bdy]]);
   }
 }
 
-module Bar(){
+module Bar(){ ////toplevel
   spoolw = spoolwidth + spoolwidthgap*2;
-  barz = barradz * 0.5;
+  barz = barrad * 0.5;
   biggestw = spoolw + 50;
 
   intersection(){
     for (mir=[0,1]) {
       mirror([mir,0,0]) {
-	translate([0,0,barz]) {
-	  scale([1,barrady,barradz]) translate([-1,0,0])
-	    rotate([0,90,0]) cylinder(r=1, h=spoolw/2+2, $fn=30);
-	  translate([spoolw/2,0,0])
-	    rotate([0,90,0]) cylinder(r=guiderad, h=guidewidth, $fn=60);
-	}
-	translate([spoolw/2 + guidewidth, 0, 0])
+	translate([spoolw/2, 0, 0])
 	  Plug();
+	translate([-1, -50, -50])
+	  cube([spoolw/2+1.1, 100, 100]);
       }
     }
     translate([-biggestw/2, -50, 0])
       cube([biggestw, 100, 100]);
+    translate([0,0,barz]) {
+      translate([-100,0,0])
+	rotate([0,90,0]) cylinder(r=barrad, h=200, $fn=30);
+    }
   }
 }
 
-module Trestle(){
+module FtAxlePin(){
+  AxlePin(barrad, (barrad + barwasherrad*2)/3 * 2);
+}
+
+module Trestle(){ ////toplevel
   legang = atan2(trestlebase/2, trestleheight);
   eplen = sqrt(trestleheight*trestleheight + trestlebase*trestlebase*0.25);
-  topblockw = plugwmax + topblockthick*2;
+  topblockw = plugwmax + trestleplugd*2 + topblockthick*2;
 
-  pinholebasew = pinbasew + pindwidth;
-  pinholeh =     pinminh +  pindh;
+  pinholebasew = pinbasew + pindwidth*2;
+  pinholeh =     pinmaxh +  pindh;
 
   difference(){
     union(){
@@ -84,7 +93,7 @@ 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 +101,13 @@ 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 +118,15 @@ 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,
-		   (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)*0.75,
+		   (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 +134,45 @@ module Trestle(){
   }
 }
 
-//Bar();
-Trestle();
+module Pin(){ ////toplevel
+  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(){ ////toplevel
+  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();
+FtAxlePin();
+//Trestle();
+//Pin();
+//TestKit();
 //Plug(d=1);
 //ExtenderPillars(80,12,8, baseweb=true);