mic-table-clamp: wip, redesign

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/mic-table-clamp.scad b/mic-table-clamp.scad
index 53de47bfab5121232245fd970dbcb250e0553fb7..7ea877d83b9c8dbe6c3ccc3a3d14370b23eac972 100644 (file)
--- a/mic-table-clamp.scad
+++ b/mic-table-clamp.scad
@@ -30,4 +30,46 @@ module Base(){
   }
 }
 
-Base();
+thread_nom = 8;
+thread_act = thread_nom - 0.375;
+
+wingnut_th = 5;
+wingnut_wall = 4;
+wingnut_wing_mindia = 17.0;
+wingnut_wing_xrad = 5; // xxx 8;
+wingnut_wing_xh = 5;
+wingnut_wing_th = 3;
+
+//$test= true;
+$test= false;
+
+$fa= 3;
+$fs= 0.2;
+
+// calculated
+
+wingnut_cnr = wingnut_wing_th/2 -0.1;
+
+module Wingnut(){
+  difference(){
+    union(){
+      cylinder(r= (thread_nom+wingnut_wall)/2,
+              h= wingnut_th);
+      linear_extrude(height= wingnut_wing_xh + wingnut_th)
+       offset(r= wingnut_cnr)
+       square([wingnut_wing_mindia + wingnut_wing_xrad*2 - wingnut_cnr*2,
+               wingnut_wing_th - wingnut_cnr*2],
+              center=true);
+    }
+    translate([0,0, wingnut_th])
+      linear_extrude(height= wingnut_wing_xh+1)
+      square(wingnut_wing_mindia, center=true);
+    translate([0,0, wingnut_th])
+      rotate([180,0,0])
+      translate([0,0,-0.01])
+      metric_thread(diameter=thread_act, leadin=3, internal=true,
+                   test=$test, length=wingnut_th+3);
+  }
+}
+
+Wingnut();