3d printed spool

Author: TheBeachLab

V2/Hardware/structure/spool-3dp.scad

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+// Alphabets New Spool
+$fn=(50);
+
+// Parameters
+ncards=64; // number of cards
+sdiam=85; // diameter of the spool mm
+e=2; // 3d printed part thickness mm
+
+// Variables
+srad=sdiam/2;
+angle=360/ncards; // angle of rotation
+
+// define copy_mirror function
+module copy_mirror(vec=[0,1,0])
+{
+    children();
+    mirror(vec) children();
+} 
+
+// Define axis motor
+module axismotor() {
+intersection() {square(size = [3, 6], center = true); circle(2.5);}
+}
+
+// Define axis support
+module axis() {
+circle(1.5);
+}
+
+// define aro
+module aro() {
+difference(){
+    difference() { circle(srad); circle(srad-5);}
+    for (a=[0:angle:360]){
+    rotate(a) 
+    translate([srad-2.5,0,0]) circle(1.5);
+    }
+}
+}
+
+// CODE STARTS HERE
+
+linear_extrude(height = e) {
+union(){    
+aro();
+    difference() {
+        intersection() {
+            union() {
+                translate ([srad,0,0]) aro();
+                translate ([-srad,0,0])  aro();
+                circle (6.5);
+                }
+            circle(srad-5);
+        }
+
+    axismotor();
+    }
+}    
+}
+
+translate ([sdiam+5,0,0])
+        union() {
+        linear_extrude(height = 5) {circle(1.5);}
+        linear_extrude(height = e) {
+        union(){    
+        aro();
+                intersection() {
+                    union() {
+                        translate ([srad,0,0]) aro();
+                        translate ([-srad,0,0])  aro();
+                        circle (6.5);
+                        }
+                    circle(srad-5);
+                }
+
+        }    
+        }
+    }