From 95796feca9abca2a675d431238759817cb7cc708 Mon Sep 17 00:00:00 2001
From: David Ashby <delta.mu.alpha@gmail.com>
Date: Sun, 31 Jul 2022 17:35:09 -0400
Subject: [PATCH] add bobbin

---
 bobbin.scad | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 bobbin.scad

diff --git a/bobbin.scad b/bobbin.scad
new file mode 100644
index 0000000..97253d2
--- /dev/null
+++ b/bobbin.scad
@@ -0,0 +1,47 @@
+difference() {
+    union() {
+        // base object
+        cube([40, 28, 1]){}
+            
+        // four corner nubbins
+        translate([5, 0, 0]){
+            cylinder(1, 5, 5){}
+        }
+        translate([5, 28, 0]){
+            cylinder(1, 5, 5){}
+        }
+        translate([35, 0, 0]){
+            cylinder(1, 5, 5){}
+        }
+        translate([35, 28, 0]){
+            cylinder(1, 5, 5){}
+        }
+    }
+
+    // ring hook hole
+    translate([5.5, 14, -1]){
+        cylinder(3, 4, 4){}
+    }
+    
+    // thread catchers
+    translate([0, 2, -1]) {
+        rotate([0, 0, 35]){
+            cube([10, .25, 3]){}
+        }
+    }
+    translate([8.25, 20, -1]) {
+        rotate([0, 0, 145]){
+            cube([10, .25, 3]){}
+        }
+    }
+    translate([40.25, 2, -1]) {
+        rotate([0, 0, 145]){
+            cube([10, .25, 3]){}
+        }
+    }
+    translate([32.25, 20, -1]) {
+        rotate([0, 0, 35]){
+            cube([10, .25, 3]){}
+        }
+    }
+}