From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sun, 10 May 2020 15:13:33 +0000 (+0100)
Subject: mic-table-clamp: wip, redesign
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;ds=sidebyside;h=a43c094e057b642144b632c52232454389a128b9;hp=d890d41ad34c32f2c7c62c5ead91058a6992f0f2;p=reprap-play.git

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 53de47b..7ea877d 100644
--- 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();