From: Jan "Yenya" Kasprzak <kas@fi.muni.cz>
Date: Thu, 27 Oct 2016 09:56:21 +0000 (+0200)
Subject: solar-powered turtle toy leg
X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?a=commitdiff_plain;h=2c388885c4115021f101a20f0b0d7e699160f2ae;p=things.git

solar-powered turtle toy leg
---

diff --git a/turtle_leg.scad b/turtle_leg.scad
new file mode 100644
index 0000000..93dba01
--- /dev/null
+++ b/turtle_leg.scad
@@ -0,0 +1,113 @@
+eps = 0.01;
+infty = 100;
+
+
+beam_len = 36;
+beam_w = 8;
+beam_h = 4.5;
+
+leg_h = 8;
+leg_d = 10;
+leg_asym = 1.5;
+leg_wall = 1.5;
+
+tail_w1 = 4;
+tail_w2 = 2;
+tail_h = 2;
+tail_len = 11;
+
+screw_d = 4;
+screw_head_d = 6;
+screw_head_h = 3;
+
+screw_bot_d = 5;
+screw_bot_h = 2;
+
+lever_hole_d = 5;
+lever_hole_x = 6;
+lever_space_d = 6.5;
+lever_space_d2 = 8;
+lever_h = 1;
+
+module body() {
+	// main beam
+	translate([-beam_len/2, -beam_w/2, 0])
+		cube([beam_len, beam_w, beam_h]);
+	// legs
+	for (x = [-1, 1]) {
+		scale([x, 1, 1]) translate([beam_len/2, 0, 0]) scale([1, leg_asym, 1])
+			cylinder(r1 = beam_w/(2*leg_asym), r2 = leg_d/(2*leg_asym), h = leg_h);
+	}
+
+	// reinforcement for the screw hole
+	cylinder(r = screw_bot_d/2 + 2, h = beam_h);
+	
+	// reinforcement for the lever hole
+	intersection() {
+		translate([lever_hole_x, 0, 0]) 
+			cylinder(r = lever_space_d/2 + 2, h = beam_h);
+		translate([-infty/2, -infty, 0]) cube(infty);
+	}
+
+/*
+	// tail
+	hull() {
+		translate([-tail_w1/2, -beam_w/2, 0])
+			cube([tail_w1, eps, tail_h]);
+		translate([-tail_w2/2, -beam_w/2-tail_len, 0])
+			cube([tail_w2, eps, tail_h]);
+	}
+*/
+}
+
+module leg() {
+	difference() {
+		body();
+
+		// legs hole
+		hull() for (x = [-1, 1])
+			scale([x, leg_asym, 1])
+				translate([beam_len/2, 0, beam_h+eps])
+				cylinder(r1 = (beam_w-2*leg_wall)/(2*leg_asym),
+					 r2 = (leg_d-2*leg_wall)/(2*leg_asym),
+					h = leg_h - beam_h + eps);
+		// legs side cut
+		for (x = [-1, 1]) scale([x, 1 ,1])
+			translate([beam_len/2, 0, 0])
+			rotate([0, 45, 0])
+			translate([0, -infty/2, -infty/2])
+				cube(infty);
+
+		// screw hole
+		rotate([0, 0, 45])
+		cylinder(r = screw_d/2, h = infty, $fn = 4);
+		// screw head
+		
+		translate([0, 0, screw_head_h])
+			cylinder(r = screw_head_d/2, h = infty);
+
+		// screw bottom
+		difference() {
+			translate([0, 0, -eps])
+				cylinder(r = screw_bot_d/2, h = screw_bot_h+eps);
+			translate([screw_d/2, -infty/2, -infty/2])
+				cube(infty);
+		}
+
+		// lever hole
+		translate([lever_hole_x, 0, -eps])
+			rotate([0, 0, 45])
+			cylinder(r = lever_hole_d/2, h = infty, $fn = 4);
+
+		// lever space
+		hull() {
+			translate([lever_hole_x, 0, -eps])
+				cylinder(r = lever_space_d/2, h=beam_h-lever_h+eps);
+			translate([lever_hole_x - lever_space_d2/2, beam_w/2, -eps])
+				cube([lever_space_d2, infty, beam_h-lever_h+eps]);
+		}
+	}
+}
+
+leg();
+