From: Jan "Yenya" Kasprzak <kas@fi.muni.cz>
Date: Fri, 19 Oct 2018 16:28:32 +0000 (+0200)
Subject: pulley
X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?a=commitdiff_plain;h=a83e8f9c9fd90218c4984f4f81da3d5c5629f255;p=things.git

pulley
---

diff --git a/pulley1.scad b/pulley1.scad
new file mode 100644
index 0000000..7b024c1
--- /dev/null
+++ b/pulley1.scad
@@ -0,0 +1,26 @@
+infty = 100;
+eps = 0.01;
+
+diameter = 20;
+thick = 2;
+d_minus = thick/2; // cca 45 deg
+
+center_hole_d = 3;
+side_holes = 5;
+side_hole_d = 5;
+
+module body() {
+	cylinder(r1 = diameter/2, r2 = diameter/2-d_minus/2, h = thick/2 + eps);
+	translate([0, 0, thick/2-eps])
+		cylinder(r2 = diameter/2, r1 = diameter/2-d_minus/2, h = thick/2 + eps);
+}
+
+difference() {
+	body($fn = 128);
+	translate([0, 0, -eps])
+		cylinder(r = center_hole_d/2, h = thick + 2*eps);
+	if (side_holes > 0) 
+	for (angle = [0:360/side_holes:360]) rotate([0, 0, angle])
+		translate([diameter/4 - d_minus + center_hole_d/2, 0, -eps])
+			cylinder(r = side_hole_d/2, h = thick + 2*eps);
+}