From 96ac57e13421f1af8863f61732a8d8b5c9c08155 Mon Sep 17 00:00:00 2001
From: jaseg <git-bigdata-wsl-arch@jaseg.de>
Date: Fri, 30 Oct 2020 12:39:34 +0100
Subject: Add mech bom, export 3d parts

---
 prototype/mech_pcbs/bearing_mount_bottom.scad | 46 +++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 prototype/mech_pcbs/bearing_mount_bottom.scad

(limited to 'prototype/mech_pcbs/bearing_mount_bottom.scad')

diff --git a/prototype/mech_pcbs/bearing_mount_bottom.scad b/prototype/mech_pcbs/bearing_mount_bottom.scad
new file mode 100644
index 0000000..53467c3
--- /dev/null
+++ b/prototype/mech_pcbs/bearing_mount_bottom.scad
@@ -0,0 +1,46 @@
+/* Linear units are mm */
+
+ext_dia = 32.0;
+int_dia = 8.0;
+h = 9;
+
+mnth_dia = 3.2;
+mnth_ins_dia = 6.0;
+mnth_ins_h = 2.0;
+mnth_center_r = 45.0;
+mnth_num = 5;
+
+mnta_w = 15.0;
+mnta_h = 6.0;
+
+bearing_od = 19.0;
+bearing_h = 6.0;
+
+$fn = 64;
+
+translate([0, 0, h])
+rotate(180, [0, 1, 0])
+difference() {
+    union() {
+        cylinder(d=ext_dia, h=h);
+        for (alpha = [0 : 360/mnth_num : 359.9999]) {
+            rotate(alpha-180, [0,0,1]) {
+                translate([0, -mnta_w/2, 0]) cube([mnth_center_r, mnta_w, mnta_h]);
+                translate([mnth_center_r, 0, 0]) cylinder(d=mnta_w, h=mnta_h);
+            }
+        }
+    }
+    
+    cylinder(d=int_dia, h=h);
+    
+    for (alpha = [0 : 360/mnth_num : 359.9999]) {
+        rotate(alpha, [0, 0, 1])
+        translate([-mnth_center_r, 0, 0])
+        union() {
+            cylinder(d=mnth_dia, h=mnta_h);
+            translate([0, 0, mnta_h-mnth_ins_h]) cylinder(d=mnth_ins_dia, h=mnth_ins_h);
+        }
+    }
+    
+    cylinder(d=bearing_od, h=bearing_h);
+}
-- 
cgit