anglepoise-neck.scad

   1 // -*- C -*-
   2
   3 arm_depth = 25;
   4 arm_pindepth = (16.15 + 18.00)/2;
   5 arm_innerwidth = 9.60 - 0.50;
   6 arm_innerheight = 8.90 - 0.50;
   7
   8 armpart_hex_rad = 15;
   9 armpart_hex_thick = 8;
  10
  11 hingepin_dia = 3;
  12
  13 // computed
  14
  15 armpart_x_unit = armpart_hex_rad * tan(30);
  16
  17 module ArmPart(){ ////toplevel
  18   translate([-arm_innerwidth/2, 1, 0])
  19     mirror([0,-1,0])
  20     cube([arm_innerwidth, arm_depth+1, arm_innerheight]);
  21   rotate([90,0,180])
  22     linear_extrude(height=armpart_hex_thick)
  23     for (mir=[0,1])
  24       mirror([mir,0,0])
  25         difference(){
  26           polygon([[-1, 0],
  27                    [armpart_x_unit, 0],
  28                    [armpart_x_unit*2, armpart_hex_rad],
  29                    [armpart_x_unit, armpart_hex_rad*2],
  30                    [-1, armpart_hex_rad*2]]);
  31           translate([0,armpart_hex_rad])
  32             circle(hingepin_dia/2, $fn=20);
  33         }
  34 }
  35
  36 ArmPart();