From d19f5d70c29b9ef988ffc648aceb789d14ff1e0a Mon Sep 17 00:00:00 2001
From: dakkar <dakkar@thenautilus.net>
Date: Fri, 25 Mar 2022 17:56:00 +0000
Subject: threaded holes!

---
 enclosure/enclosure.scad | 43 +++++++++++++++++++++++++++++++++++++------
 1 file changed, 37 insertions(+), 6 deletions(-)

diff --git a/enclosure/enclosure.scad b/enclosure/enclosure.scad
index c3424f7..52fef36 100644
--- a/enclosure/enclosure.scad
+++ b/enclosure/enclosure.scad
@@ -10,11 +10,15 @@
   * bottom, for battery and pm sensor
  */
 
+use <threads-scad/threads.scad>
+
 WALL_THICKNESS=1;
 
 SCREW_DIAM=4;
 SCREW_PAD=0;
 
+BOLT_STEM_Z=24.7;
+
 PM_X=40.8;
 PM_Y=40.8;
 PM_Z=12.5;
@@ -104,31 +108,58 @@ module screw_hole() {
   cylinder(h=200,d=SCREW_DIAM,center=true,$fs=0.1);
 }
 
-module screw_holes() {
+module myScrew(outer_diam, height, position=[0,0,0], rotation=[0,0,0], pitch=0, tooth_angle=30, tolerance=0.4, tooth_height=0) {
+  extra_height = 0.001 * height;
+
+  translate(position)
+    rotate(rotation)
+    translate([0, 0, -extra_height/2])
+    ScrewThread(1.01*outer_diam + 1.25*tolerance, height + extra_height,
+                pitch, tooth_angle, tolerance, tooth_height=tooth_height);
+}
+
+module screw_hole_threaded() {
+  H=BOLT_STEM_Z-TOP_Z-MIDDLE_Z;
+  myScrew(
+          outer_diam=SCREW_DIAM,
+          height=H,
+          position=[0,0,BOTTOM_Z-H]
+          );
+}
+
+module place_screw_holes() {
   OFF=WALL_THICKNESS + SCREW_DIAM/2 + SCREW_PAD;
 
   translate([
              TOTAL_X/2 - OFF,
              TOTAL_Y/2 - OFF,
-             0]) screw_hole();
+             0]) children();
 
   translate([
              -(TOTAL_X/2 - OFF),
              TOTAL_Y/2 - OFF,
-             0]) screw_hole();
+             0]) children();
 
   translate([
              TOTAL_X/2 - OFF,
              -(TOTAL_Y/2 - OFF),
-             0]) screw_hole();
+             0]) children();
 
   translate([
              -(TOTAL_X/2 - OFF),
              -(TOTAL_Y/2 - OFF),
-             0]) screw_hole();
+             0]) children();
              
 }
 
+module screw_holes() {
+  place_screw_holes() screw_hole();
+}
+
+module screw_holes_threaded() {
+  place_screw_holes() screw_hole_threaded();
+}
+
 module pm_sensor() {
   box([PM_X,PM_Y,PM_Z]);
 }
@@ -284,7 +315,7 @@ module bottom() {
 
   difference() {
     box([TOTAL_X, TOTAL_Y, BOTTOM_Z]);
-    screw_holes();
+    screw_holes_threaded();
     translate([PM_X_OFF, 0, WALL_THICKNESS]) pm_sensor();
     translate([CABLE_X_OFF, CABLE_Y_OFF, CABLE_Z_OFF]) bottom_cable_well();
     translate([BATT_X_OFF, 0, BATT_Z_OFF]) battery();
-- 
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