X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=filamenttrestle.scad;h=7f751f9d3a61f029fa6aad340fef7f447027feef;hb=da007ff1f40070f936a7aed64dcd8a75a5f3122d;hp=74f6fb609a54a04c646e8f392f346c2e4fe96dcd;hpb=23eb021b6712483be842fa8903e68bc6e1088b66;p=reprap-play.git

diff --git a/filamenttrestle.scad b/filamenttrestle.scad
index 74f6fb6..7f751f9 100644
--- a/filamenttrestle.scad
+++ b/filamenttrestle.scad
@@ -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>
 
@@ -11,24 +13,37 @@ guidewidth = 3;
 guiderad = 20;
 
 plugl = 12;
-plugwmin = 4;
+plugwmin = 3;
 plugh = 10;
 plugslope = 0.5;
-plugwmax = plugwmin + plugh * plugslope;
+plugwmax = plugwmin + plugh * plugslope * 2;
+
+trestlelegw = 10;
+trestlebaseh = 10;
+trestleplugd = 1;
+
+topblockthick = 3;
+topblockbasedepth = 4;
+
+pinbasew = 3;
+pinminh = 1.0;
+pinmaxh = 3;
+pindh = 1.0;
+pindwidth = 1.0;
 
 module Plug(d=0){
+  dw = d;
+  dh = d;
   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){
-    polygon([[-(plugwmax + bdx),  0],
-	     [-(plugwmin + tdx),  plugh + tdy],
-	     [+(plugwmin + tdx),  plugh + tdy],
-	     [+(plugwmax + bdx),  0]]);
+  bdx = dw / cos(a);
+  tdy = dh;
+  tdx = bdx + dh * plugslope;
+  translate([-d,0,0]) rotate([90,0,90]) linear_extrude(height=plugl+0.1+d*2){
+    polygon([[-(plugwmin/2 + bdx),  0],
+	     [-(plugwmax/2 + tdx),  plugh + tdy],
+	     [+(plugwmax/2 + tdx),  plugh + tdy],
+	     [+(plugwmin/2 + bdx),  0]]);
   }
-  translate([plugl + DoveClip_depth()*0.7, 0, 0])
-    DoveClipPairSane(count=1, h=plugh);
 }
 
 module Bar(){
@@ -54,5 +69,58 @@ module Bar(){
   }
 }
 
-Bar();
+module Trestle(){
+  legang = atan2(trestlebase/2, trestleheight);
+  eplen = sqrt(trestleheight*trestleheight + trestlebase*trestlebase*0.25);
+  topblockw = plugwmax + topblockthick*2;
+
+  pinholebasew = pinbasew + pindwidth;
+  pinholeh =     pinminh +  pindh;
+
+  difference(){
+    union(){
+      for (mir=[0,1]) {
+	mirror([mir,0,0]) {
+	  rotate([0,0, -90-legang])
+	    ExtenderPillars(length=eplen+trestlelegw,
+			    width=trestlelegw,
+			    height=plugl,
+			    baseweb=true);
+
+	  translate([-trestlebase/2, -trestleheight, 0])
+	    cylinder(r=trestlelegw/2*1.2, h=plugl);
+	}
+      }
+      translate([-topblockw/2, -topblockbasedepth, 0])
+	cube([topblockw, topblockbasedepth + plugh + topblockthick, plugl]);
+
+      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);
+
+    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]]);
+	  }
+	}
+      }
+    }
+  }
+}
+
+//Bar();
+Trestle();
+
 //Plug(d=1);
+//ExtenderPillars(80,12,8, baseweb=true);