From 9eeb7724efed6a8f960713120b3ffd002950049d Mon Sep 17 00:00:00 2001
From: Jan Huwald <jh@sotun.de>
Date: Tue, 4 Feb 2014 12:42:54 +0100
Subject: add nut hole on bottom

Otherwise the structure would stand on a single nut.

diff --git a/connector_front.scad b/connector_front.scad
index 413f90b..56c7431 100644
--- a/connector_front.scad
+++ b/connector_front.scad
@@ -33,6 +33,10 @@ module half() difference() {
   translate([0, bar_thickness * 1.5, tray_height - bar_thickness / 2]) rotate([0, 90, 0])
     cylinder(h = tray_width / 2, r = (rod_diameter + pla_epsilon) / 2, $fs=0.1);
 
+  // hole for nut on the bottom of the vertical rod
+  translate([0, bar_thickness / 2, 0])
+    cylinder(h=nut_height, r=nut_diameter/2 + pla_epsilon, $fs=0.1);
+
   // female downward positioning nippel
   translate([rail_width, bar_thickness / 2, tray_height]) nipple(pla_epsilon);
 }
diff --git a/parameters.scad b/parameters.scad
index f95d757..cd4f964 100644
--- a/parameters.scad
+++ b/parameters.scad
@@ -4,8 +4,10 @@ cooling_height = 10;
 // thickness of the support bar
 bar_thickness = 10;
 
-// diameter of thread rod used for support
+// outer diameter of thread rod and nut used for support
 rod_diameter = 4;
+nut_diameter = 6;
+nut_height = 3;
 
 // dimensions of HDDs; not model-specific; current values are fake
 hdd_width = 80;
-- 
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