From 8e8a38be5129a03519493213693b8af7428fecae Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sun, 10 May 2020 21:07:29 +0100
Subject: [PATCH] mic-table-clamp: wip stem etc.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 mic-table-clamp.scad | 57 +++++++++++++++++++++++++-------------------
 1 file changed, 33 insertions(+), 24 deletions(-)

diff --git a/mic-table-clamp.scad b/mic-table-clamp.scad
index 17c0ba8..d358569 100644
--- a/mic-table-clamp.scad
+++ b/mic-table-clamp.scad
@@ -9,26 +9,11 @@ include <camera-mount.scad>
 positive_dia = inch * 3/8. - 0.375;
 positive_l = inch * 1/2.;
 
-stem_l = 7;
+stem_l = 20;
 stem_dia = 12;
-
-base_th = 3;
-base_dia = 60;
-
-module Base(){
-  translate([0,0,-0.1])
-    english_thread(diameter=positive_dia/inch, threads_per_inch=16,
-		   leadin=1, test=$test,
-		   length= (positive_l + 0.1) / inch);
-
-  rotate([180,0,0]) {
-    cylinder(r= stem_dia/2 * 1/(0.5 * sqrt(3)),
-	     h = stem_l + 1,
-	     $fn=6);
-    translate([0,0, stem_l])
-      cylinder(r= base_dia/2, h= base_th);
-  }
-}
+stem_th = 3;
+stem_ceil = 2;
+stem_base_dia = 30;
 
 thread_nom = 8;
 thread_pitch = 1.25;
@@ -51,6 +36,32 @@ $fs= 0.2;
 
 wingnut_cnr = wingnut_wing_th/2 -0.1;
 
+module OurThread(l){
+  translate([0,0,-0.01])
+    metric_thread(diameter=thread_act, pitch=thread_pitch,
+		  leadin=3, internal=true,
+		  test=$test, length=l);
+}
+
+module Stem(){
+  translate([0,0, stem_l -0.1])
+    english_thread(diameter=positive_dia/inch, threads_per_inch=16,
+		   leadin=1, test=$test,
+		   length= (positive_l + 0.1) / inch);
+
+  difference(){
+    union(){
+      cylinder(r= stem_dia/2 * 1/(0.5 * sqrt(3)),
+	       h = stem_l,
+	       $fn=6);
+      cylinder(r= stem_dia/2 * 1/(0.5 * sqrt(3)),
+	       h = stem_l,
+	       $fn=6);
+    }
+    OurThread(stem_l - stem_ceil);
+  }
+}
+
 module Wingnut(){
   difference(){
     union(){
@@ -71,14 +82,12 @@ module Wingnut(){
       square(wingnut_wing_mindia, center=true);
     translate([0,0, wingnut_th])
       rotate([180,0,0])
-      translate([0,0,-0.01])
-      metric_thread(diameter=thread_act, pitch=thread_pitch,
-		    leadin=3, internal=true,
-		    test=$test, length=wingnut_th+3);
+      OurThread(wingnut_th+3);
     mirror([0,0,1])
       linear_extrude(height=5)
       square(center=true, wingnut_wing_mindia*2);
   }
 }
 
-Wingnut();
+//Wingnut();
+Stem();
-- 
2.30.2