X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=anglepoise-neck.scad;h=fc07ecd905fc7c2f97c2dd34f4401ad985fe42a6;hp=7559684faa0e1062214008e0c9cd502a0140776f;hb=e43db550cad7c9bb7f546dad902ba053457bc6c3;hpb=85cba54dbab09189eba4983b9b0dd01b9f9f322a

diff --git a/anglepoise-neck.scad b/anglepoise-neck.scad
index 7559684..fc07ecd 100644
--- a/anglepoise-neck.scad
+++ b/anglepoise-neck.scad
@@ -1,14 +1,18 @@
 // -*- C -*-
 
 arm_depth = 25;
-arm_pindepth = (16.15 + 18.00)/2;
 arm_innerwidth = 9.60 - 0.50;
 arm_innerheight = 8.90 - 0.50;
+arm_pin_depth = (16.15 + 18.00)/2;
+arm_pin_dia = 1.5;
 
 armpart_hex_rad = 15;
-armpart_hex_thick = 8;
+armpart_main_thick = 8;
 
 hingepin_dia = 3;
+hingenut_width = 6;
+hingenut_depth = 4;
+hingenut_clear = 5;
 
 headpart_main_dia = 15 - 0.3;
 headpart_main_len = 14;
@@ -19,28 +23,32 @@ headpart_flatten_angle = 45;
 
 // computed
 
+armpart_hinge_height = arm_innerheight + hingenut_width/2 + hingenut_clear;
+armpart_main_height = armpart_hinge_height + headpart_stub_width / 2;
+armpart_main_width = headpart_stub_width;
 armpart_x_unit = armpart_hex_rad * tan(30);
 headpart_flatten_z = headpart_main_dia/2 * cos(headpart_flatten_angle);
 headpart_stub_support_x = headpart_stub_width * cos(59) / 2;
 headpart_stub_len = headpart_stub_protrude + headpart_main_dia/2;
+hingenut_depth_y =
+  sqrt(headpart_main_dia*headpart_main_dia/4 - hingenut_width*hingenut_width/4)
+  - hingenut_depth;
 
 module ArmPart(){ ////toplevel
-  translate([-arm_innerwidth/2, 1, 0])
-    mirror([0,-1,0])
-    cube([arm_innerwidth, arm_depth+1, arm_innerheight]);
-  rotate([90,0,180])
-    linear_extrude(height=armpart_hex_thick)
-    for (mir=[0,1])
-      mirror([mir,0,0])
-	difference(){
-	  polygon([[-1, 0],
-		   [armpart_x_unit, 0],
-		   [armpart_x_unit*2, armpart_hex_rad],
-		   [armpart_x_unit, armpart_hex_rad*2],
-		   [-1, armpart_hex_rad*2]]);
-	  translate([0,armpart_hex_rad])
-	    circle(hingepin_dia/2, $fn=20);
-        }
+  difference(){
+    translate([-arm_innerwidth/2, 1, 0])
+      mirror([0,-1,0])
+      cube([arm_innerwidth, arm_depth+1, arm_innerheight]);
+    translate([0, -arm_pin_depth, -50])
+      cylinder(r=arm_pin_dia/2, h=100);
+  }
+  difference(){
+    translate([-armpart_main_width/2, 0, 0])
+      cube([armpart_main_width, armpart_main_thick, armpart_main_height]);
+    translate([0,50,armpart_hinge_height])
+      rotate([90,0,0])
+      cylinder(r=hingepin_dia/2, h=100, $fn=20);
+  }
 }
 
 module HeadPart(){ ////toplevel
@@ -62,8 +70,14 @@ module HeadPart(){ ////toplevel
     }
     translate([-100,-100,-100])
       cube([200,200, 100 - headpart_flatten_z]);
+    rotate([90,0,0])
+      translate([0,0, -100])
+      cylinder(r=hingepin_dia/2, h = 200, $fn=20);
+    translate([0,hingenut_depth_y,0])
+      rotate([90,0,180])
+      cylinder(r=hingenut_width/2/cos(30), h=20, $fn=6);
   }
 }
 
 //ArmPart();
-HeadPart();
+//HeadPart();