commit 99419942de2fae1e234ef097093b4560fb8df3d1
Author: LongHairedHacker <sebastian@sebastians-site.de>
Date:   Tue Jul 5 17:11:32 2016 +0200

    initial commit

diff --git a/.gitignore b/.gitignore
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--- /dev/null
+++ b/.gitignore
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+*.stl
+
diff --git a/QFH_dimensions.jpg b/QFH_dimensions.jpg
new file mode 100644
index 0000000..b276917
Binary files /dev/null and b/QFH_dimensions.jpg differ
diff --git a/constants.scad b/constants.scad
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index 0000000..3f6610b
--- /dev/null
+++ b/constants.scad
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+tube_inner_diameter = 13.5;
+insert_length = 20;
+insert_hole_dia = 5;
+
+top_inner_diameter = 20;
+top_outer_diameter = 30;
+top_height = 15;
+top_inner_depth = 10;
+
+
+arm_dia = 10;
+arm_hole_dia = 3;
+arm_radius = 25;
diff --git a/top.scad b/top.scad
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--- /dev/null
+++ b/top.scad
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+include <constants.scad>;
+
+$fn = 90;
+
+module top() {    
+    difference() {
+        
+        union() {
+            cylinder(r = top_outer_diameter/2,
+                h = top_height);
+            
+            for(angle = [0, 90, 180, 270]) {
+                rotate([0, 0, angle])
+                    translate([arm_radius / 2, 
+                                0,
+                                top_height - arm_dia / 2])
+                
+                        rotate([0, 90, 0])
+                            cylinder(r = arm_dia / 2, 
+                                h = arm_radius,
+                                center = true); 
+            }
+            
+            translate([0, 0, -insert_length])
+                cylinder(r = tube_inner_diameter/2, 
+                        h = insert_length);
+        }
+        
+        union()  {
+            translate([0, 0, top_height - top_inner_depth])
+                cylinder(r = top_inner_diameter/2,
+                        h = top_inner_depth);
+            
+            for(angle = [0, 90, 180, 270]) {
+                rotate([0, 0, angle])
+                    translate([arm_radius / 2, 
+                                0,
+                                top_height - arm_dia / 2])
+                
+                        rotate([0, 90, 0])
+                            cylinder(r = arm_hole_dia / 2, 
+                                h = arm_radius,
+                                center = true); 
+            }
+            
+            translate([0, 0, -insert_length])
+                cylinder(r = insert_hole_dia / 2, 
+                        h = insert_length + top_height);
+        }
+    }
+    
+    
+};
+
+
+top();
\ No newline at end of file