X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=filamenttrestle.scad;h=9d9e41f6a54000a16213061ee07c1b10a9804850;hp=57f52ad3f54ec173b26211063d4bf217f3de51c5;hb=47469cebb4ff8384aae1fb2f7ed2154b8ea08405;hpb=4a21d8d71430dfbb98d532b664cbfd948dec6ae2

diff --git a/filamenttrestle.scad b/filamenttrestle.scad
index 57f52ad..9d9e41f 100644
--- a/filamenttrestle.scad
+++ b/filamenttrestle.scad
@@ -22,14 +22,22 @@ trestlelegw = 10;
 trestlebaseh = 10;
 trestleplugd = 1;
 
-topcylthick = 3;
-topcylbasedepth = 4;
+topblockthick = 4;
+topblockbasedepth = 4;
+
+pinbasew = 3;
+pinminh = 1.0;
+pinmaxh = 3;
+pindh = 1.0;
+pindwidth = 1.0;
 
 module Plug(d=0){
-  a = -atan(plugslope);
-  tdx = d * cos(a);
-  tdy = d * sin(a);
-  bdx = d / cos(a);
+  dw = d;
+  dh = d;
+  a = atan(plugslope);
+  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],
@@ -64,7 +72,10 @@ module Bar(){
 module Trestle(){
   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;
 
   difference(){
     union(){
@@ -80,8 +91,8 @@ module Trestle(){
 	    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, plugl]);
 
       translate([-trestlebase/2, -trestleheight, 0])
 	ExtenderPillars(length=trestlebase, width=trestlebaseh*2, height=plugl);
@@ -91,6 +102,20 @@ module Trestle(){
 
     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]]);
+	  }
+	}
+      }
+    }
   }
 }