From 7ddb7df8e6a11e13bc78a5a9fbbe8f00a9fa3a6f Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Thu, 5 Nov 2020 17:56:34 +0000
Subject: [PATCH] scaffold-clamp: wip

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 scaffold-clamp.scad | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 scaffold-clamp.scad

diff --git a/scaffold-clamp.scad b/scaffold-clamp.scad
new file mode 100644
index 0000000..5d669ed
--- /dev/null
+++ b/scaffold-clamp.scad
@@ -0,0 +1,25 @@
+// -*- C -*-
+
+tube_dia = 48.3;
+
+th = 6;
+
+pin_gap = 1.0; // around
+
+// calculated
+
+pin_dia = th;
+hole_dia = th + pin_gap;
+
+hinge_o_r = 0.5 * hole_dia + th;
+
+hinge_x = -0.5 * tube_dia - hinge_o_r;
+
+module Plan() {
+  union(){
+    translate([hinge_x, 0]) circle(r= hinge_o_r);
+    circle(r = tube_dia/2 + th);
+  }
+}
+
+Plan();
-- 
2.30.2