4 arm_pindepth = (16.15 + 18.00)/2;
5 arm_innerwidth = 9.60 - 0.50;
6 arm_innerheight = 8.90 - 0.50;
15 armpart_x_unit = armpart_hex_rad * tan(30);
17 module ArmPart(){ ////toplevel
18 translate([-arm_innerwidth/2, 1, 0])
20 cube([arm_innerwidth, arm_depth+1, arm_innerheight]);
22 linear_extrude(height=armpart_hex_thick)
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);