X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=filamenttrestle.scad;h=2ebccdcadca615b52ad17ed4135212dcf66f548f;hb=6805b4e32f51188f9541ed40d00c8f1e242dbc1d;hp=fac82b7f3c95e5e614a69100d7e4075fb8d0557e;hpb=5476e5ba105673b154b43445d884cafb28d875fa;p=reprap-play.git

diff --git a/filamenttrestle.scad b/filamenttrestle.scad
index fac82b7..2ebccdc 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>
 
@@ -9,8 +11,32 @@ barrady = 5;
 barradz = 7;
 guidewidth = 3;
 guiderad = 20;
-clipdepth = 16;
-clipcount = 3;
+
+plugl = 12;
+plugwmin = 3;
+plugh = 10;
+plugslope = 0.5;
+plugwmax = plugwmin + plugh * plugslope * 2;
+
+trestlelegw = 10;
+trestlebaseh = 10;
+trestleplugd = 1;
+
+topcylthick = 3;
+topcylbasedepth = 4;
+
+module Plug(d=0){
+  a = -atan(plugslope);
+  tdx = d * cos(a);
+  tdy = d * sin(a);
+  bdx = d / cos(a);
+  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]]);
+  }
+}
 
 module Bar(){
   spoolw = spoolwidth + spoolwidthgap*2;
@@ -26,11 +52,8 @@ module Bar(){
 	  translate([spoolw/2,0,0])
 	    rotate([0,90,0]) cylinder(r=guiderad, h=guidewidth, $fn=60);
 	}
-	translate([spoolw/2 + guidewidth +
-		   DoveClipPairSane_width(clipcount)/2 - 0.1,
-		   clipdepth/2, -0.01])
-	  rotate([90,90,0])
-	    DoveClipPairSane(h=clipdepth, count=clipcount, baseextend=barrady);
+	translate([spoolw/2 + guidewidth, 0, 0])
+	  Plug();
       }
     }
     translate([-biggestw/2, -50, 0])
@@ -38,4 +61,48 @@ module Bar(){
   }
 }
 
-Bar();
+module Trestle(){
+  legang = atan2(trestlebase/2, trestleheight);
+  eplen = sqrt(trestleheight*trestleheight + trestlebase*trestlebase*0.25);
+  topcylr = max(plugwmax/2,
+		trestlelegw/2,
+		sqrt(plugwmin*2/4 + plugh*plugh)
+		) + topcylthick + trestleplugd;
+
+  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);
+	}
+      }
+      intersection(){
+	translate([0, 3, 0])
+	  cylinder(r=topcylr, h=plugl);
+	translate([-50, -topcylbasedepth, -1])
+	  cube([100, 50, plugl+2]);
+      }
+
+      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);
+  }
+}
+
+//Bar();
+Trestle();
+
+//Plug(d=1);
+//ExtenderPillars(80,12,8, baseweb=true);