X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=filamenttrestle.scad;h=924135230e684cd1c6b69d23ee08cdcbf987a488;hp=4532c79867aef2be1c27adc1a9e4bebf67089e2e;hb=a29c73bb71de340433ee51a5ed92c04a39ea67ea;hpb=41ada164bf149e5e19488caf25527800fd3fc78c

diff --git a/filamenttrestle.scad b/filamenttrestle.scad
index 4532c79..9241352 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;
@@ -22,29 +23,36 @@ trestlelegw = 10;
 trestlebaseh = 10;
 trestleplugd = 1;
 
-topcylthick = 3;
-topcylbasedepth = 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){
-  a = -atan(plugslope);
-  tdx = d * cos(a);
-  tdy = d * sin(a);
-  bdx = d / cos(a);
+  dw = d;
+  dh = d;
+  dhb = d*2;
+  a = atan(plugslope);
+  bdy = -dhb;
+  bdx = dw / cos(a) + bdy * plugslope;
+  tdy = dh;
+  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;
   biggestw = spoolw + 50;
@@ -67,13 +75,13 @@ module Bar(){
   }
 }
 
-module Trestle(){
+module Trestle(){ ////toplevel
   legang = atan2(trestlebase/2, trestleheight);
   eplen = sqrt(trestleheight*trestleheight + trestlebase*trestlebase*0.25);
-  topcylw = plugwmax + topcylthick*2;
+  topblockw = plugwmax + trestleplugd*2 + topblockthick*2;
 
-  pinholebasew = pinbasew + pindwidth;
-  pinholeh =     pinminh +  pindh;
+  pinholebasew = pinbasew + pindwidth*2;
+  pinholeh =     pinmaxh +  pindh;
 
   difference(){
     union(){
@@ -82,18 +90,21 @@ module Trestle(){
 	  rotate([0,0, -90-legang])
 	    ExtenderPillars(length=eplen+trestlelegw,
 			    width=trestlelegw,
-			    height=plugl,
+			    height=legw,
 			    baseweb=true);
 
 	  translate([-trestlebase/2, -trestleheight, 0])
 	    cylinder(r=trestlelegw/2*1.2, h=plugl);
 	}
       }
-      translate([-topcylw/2, -topcylbasedepth, 0])
-	cube([topcylw, topcylbasedepth + plugh + topcylthick, plugl]);
+      translate([-topblockw/2, -topblockbasedepth, 0])
+	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]);
@@ -103,13 +114,16 @@ module Trestle(){
 
     for (rot=[0,180]) {
       translate([0,0,plugl/2]) rotate([0,rot,0]) translate([0,0,-plugl/2]) {
-	translate([-(topcylw*0.25+1),
- 	           plugh,
-		   (plugl - pinholebasew*2)/3]) rotate([0,90,0]) {
-	  linear_extrude(height = topcylw*1.0+2) {
-	    polygon([[-1.0 * pinholebasew, -0.01],
-		     [-0.5 * pinholebasew, pinholeh],
-		     [ 0                 , -0.01]]);
+	translate([-(topblockw*0.25+1),
+ 	           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]]);
+	    }
 	  }
 	}
       }
@@ -117,8 +131,44 @@ 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();
+//Trestle();
+//Pin();
+//TestKit();
 //Plug(d=1);
 //ExtenderPillars(80,12,8, baseweb=true);