X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=splitpin.scad;h=9631c95e0e453823b87c1ac228116655fd07e646;hp=7120037a088668db33445931418bfc84bae03438;hb=54bd06ca91fcf2679a90004d5fa7e0b4fbfebc74;hpb=38148b180154faadec3c3ce111836ecf1d88c31b

diff --git a/splitpin.scad b/splitpin.scad
index 7120037..9631c95 100644
--- a/splitpin.scad
+++ b/splitpin.scad
@@ -6,45 +6,76 @@ tau = 6.28318530718;
 function deg2rad(deg) = deg/360 * tau;
 function rad2deg(rad) = rad/tau * 360;
 
-module SplitPin(w=1.5, holeminrad=4, thick=3, deviationrad=1.5,
-		mainlen=20, handlerad=10, handlelen=7){
-  spare = holeminrad - deviationrad - w;
+module SplitPin(w=1.5, holeminrad=2.50, thick=3, deviationrad=1.5,
+		mainlen=15, handlerad=20, handlelen=12) {
+  spare = holeminrad*2 - deviationrad - w*2;
   echo("splitpin spare",spare);
   %translate([0,mainlen+handlelen,0]) cylinder(r=spare, h=thick);
   %translate([0,mainlen,thick/2]) rotate([90,0,0])
      cylinder(r=holeminrad, h=thick);
 
-  bent_x0 = w*1.5;
-  bent_x1 = holeminrad;
-  bent_dx = bent_x1 - bent_x0;
-  bent_y1 = mainlen;
-  bent_dy = bent_y1;
-  bent_rad = (bent_dy / bent_dx) * bent_dy;
-  bent_subang = atan(bent_dx / bent_dy);
-  actual_mainlen = bent_rad * deg2rad(bent_subang);
-
+  bent_dx = holeminrad;
   unbent_dx = bent_dx + deviationrad;
-  unbent_subang = atan(unbent_dx / actual_mainlen);
-  unbent_rad = actual_mainlen / deg2rad(unbent_subang);
 
-  main_cx = w*1.5 + unbent_rad;
+  unbent_subang = atan(unbent_dx / mainlen);
+  unbent_rad = mainlen / deg2rad(unbent_subang);
+
+  corner_x = unbent_rad * (1 - cos(unbent_subang));
+  corner_y = unbent_rad * sin(unbent_subang);
+
+  main_cx = unbent_rad;
 
-  for (xmir=[0,1]) mirror([xmir,0,0]) {
-    linear_extrude(height=thick) {
+//  translate([w*1.5, 0, 0]) {
+//    translate([corner_x, corner_y, 10]) %cube([10,10,10]);
+//    translate([bent_dx, 0, 10]) %cube([10,10,10]);
+//    translate([unbent_dx, 5, 10]) %cube([10,10,10]);
+//  }
+
+  linear_extrude(height=thick) {
+    for (xmir=[0,1]) mirror([xmir,0,0])
       FlatArc(0,0, w*0.5, w*1.5, 270-1,360);
+    translate([w*1.5, 0, 0]) {
       FlatArc($fa=1, main_cx,0, unbent_rad, unbent_rad+w,
 	      180-unbent_subang, 180);
-      translate([unbent_rad * (1 - cos(unbent_subang)) + w*1.5,
-		 unbent_rad * sin(unbent_subang)])
-	rotate([0,0,-unbent_subang]) {
-	translate([-(w + deviationrad), -0.1])
+      translate([corner_x, corner_y]) rotate([0,0,-unbent_subang]) {
+	rotate([0,0,10])
+	  translate([w*0.2,0,0])
+	  translate([-(w + deviationrad), -0.1])
 	  square(size=[w + deviationrad, w+0.1]);
 	FlatArc(-deviationrad + handlerad, w,
 		handlerad, handlerad+w,
-		180-rad2deg(handlelen/handlerad), 180);
+		180-rad2deg(handlelen/handlerad), 180+rad2deg(w/handlerad),
+		$fa=0.25, $fn=60);
+      }
+    }
+    mirror([1,0,0]) translate([w*1.5, 0, 0])
+      FlatArc($fa=1, main_cx,0, unbent_rad, unbent_rad+w,
+	      180-(unbent_subang + rad2deg((handlelen+w)/unbent_rad)), 180);
+  }
+}
+
+module SplitPinCavity(w=1.5, holeminrad=2.50, thick=3, deviationrad=1.5,
+		      mainlen=15, slop=0.5, insertby = 5) {
+  smallgap2 = holeminrad;
+  biggap2 = smallgap2 + deviationrad + slop;
+  toegap2 = w*1.5 + slop;
+  toeend = -mainlen-insertby;
+
+  translate([0,thick/2,0]) rotate([90,0,0]) {
+    linear_extrude(height = thick + slop*2) {
+    for (xmir=[0,1]) mirror([xmir,0]) {
+	polygon([[-0.1, 1],
+		 [(smallgap2+biggap2)/2, 1],
+		 [smallgap2, -insertby],
+		 [biggap2, -insertby],
+		 [toegap2, toeend-1],
+		 [-0.1, toeend-1]]);
       }
     }
   }
 }
 
 SplitPin();
+translate([0,15+5,-10])
+  rotate([-90,0,0])
+  SplitPinCavity();