improved 15mm firework launcher

firework_15mm/firework_15mm.scad

@@ -1,51 +1,93 @@
 
 charge_dia = 16.2;
-charge_height = 55.0;
+charge_height = 42.0;
 charge_wall = 2.5;
 
-ignite_dia = 6.8;
-ignite_height = 17.0;
+base_add = 2.5;
+bottom_pins = 3.0;
+
+ignite_dia = 7.0;
+ignite_height = 20.0;
 ignite_wall = 1.2;
 
 cable_dia = 5.0;
+cable_width = 2.0;
 
-base_width = 25;
-base_height = 10.0;
-base_wall = 3.0;
-
-hole_dia = 5.0;
-hole_len = 8.0;
+hole_dia = 7.0;
+hole_len = 15.0;
 hole_angle = 45.0;
-hole_off = 2.0;
-hole_off2 = 5.0;
+hole_off = 4.0;
+hole_off2 = 2.0;
+
+mount_height = 2.0;
+mount_width = 6.0;
+mount_len = 10.0;
+mount_hole = 3.2;
 
 $fn = 42;
 
-module charge() {
-    difference() {
-        cylinder(d = charge_dia + (2 * charge_wall), h = charge_height + charge_wall);
-        
-        translate([0, 0, charge_wall])
-        cylinder(d = charge_dia, h = charge_height + 1);
-        
-        translate([0, 0, -1])
-        cylinder(d = cable_dia, h = charge_wall + 2);
-        
+module gas_holes() {
         translate([charge_dia / 2 + charge_wall + hole_off, 0, hole_off2])
         rotate([0, -hole_angle, 0])
         cylinder(d = hole_dia, h = hole_len);
-        
         translate([-charge_dia / 2 - charge_wall - hole_off, 0, hole_off2])
         rotate([0, hole_angle, 0])
         cylinder(d = hole_dia, h = hole_len);
-        
         translate([0, charge_dia / 2 + charge_wall + hole_off, hole_off2])
         rotate([hole_angle, 0, 0])
         cylinder(d = hole_dia, h = hole_len);
-        
         translate([0, -charge_dia / 2 - charge_wall - hole_off, hole_off2])
         rotate([-hole_angle, 0, 0])
         cylinder(d = hole_dia, h = hole_len);
+}
+
+module mount_tabs() {
+    for (i = [0 : 90 : 360]) {
+        rotate([0, 0, i + 45])
+        translate([charge_dia / 2, -mount_width / 2, 0])
+        difference() {
+            union() {
+                cube([mount_len, mount_width, mount_height]);
+                
+                translate([mount_len, mount_width / 2, 0])
+                cylinder(d = mount_width, h = mount_height);
+            }
+            
+            translate([mount_len, mount_width / 2, -1])
+            cylinder(d = mount_hole, h = mount_height + 2);
+        }
+    }
+}
+
+module charge() {
+    difference() {
+        // outer shell
+        cylinder(d = charge_dia + (2 * charge_wall), h = charge_height + charge_wall + base_add);
+        
+        // bore hole
+        translate([0, 0, charge_wall + base_add])
+        cylinder(d = charge_dia, h = charge_height + 1);
+        
+        // cable hole
+        translate([0, 0, -1])
+        cylinder(d = cable_dia, h = charge_wall + base_add + 2);
+        
+        // cable cut on bottom
+        translate([0, -cable_dia / 2, -1])
+        cube([charge_dia, cable_dia, cable_width + 1]);
+        
+        translate([0, 0, base_add])
+        gas_holes();
+        
+        translate([0, 0, charge_height / 2 + base_add])
+        gas_holes();
+    }
+    
+    // pins to hold up long charges
+    for (i = [0 : 90 : 360]) {
+        rotate([0, 0, i + 45])
+        translate([(charge_dia - bottom_pins) / 2, 0, charge_wall + base_add])
+        sphere(d = bottom_pins);
     }
 }
 
@@ -64,55 +106,10 @@ module ignite() {
 module top() {
     charge();
 
-    translate([0, 0, charge_wall])
+    translate([0, 0, charge_wall + base_add])
     ignite();
-}
-
-module pillars() {
-    hull() {
-        cube([base_wall, base_wall, base_wall]);
-        
-        translate([base_width / 2, base_width / 2, base_height + base_wall])
-        cylinder(d = charge_dia + (2 * charge_wall), h = 1);
-    }
-    
-    hull() {
-        translate([base_width - base_wall, 0, 0])
-        cube([base_wall, base_wall, base_wall]);
-        
-        translate([base_width / 2, base_width / 2, base_height + base_wall])
-        cylinder(d = charge_dia + (2 * charge_wall), h = 1);
-    }
-    
-    hull() {
-        translate([0, base_width - base_wall, 0])
-        cube([base_wall, base_wall, base_wall]);
-        
-        translate([base_width / 2, base_width / 2, base_height + base_wall])
-        cylinder(d = charge_dia + (2 * charge_wall), h = 1);
-    }
-    
-    hull() {
-        translate([base_width - base_wall, base_width - base_wall, 0])
-        cube([base_wall, base_wall, base_wall]);
-        
-        translate([base_width / 2, base_width / 2, base_height + base_wall])
-        cylinder(d = charge_dia + (2 * charge_wall), h = 1);
-    }
-}
-
-module base() {
-    cube([base_width, base_width, base_wall]);
-    
-    difference() {
-        pillars();
-        
-        translate([base_width / 2, base_width / 2, base_wall + 1])
-        cylinder(d = cable_dia, h = base_height + 2);
-    }
     
-    translate([base_width / 2, base_width / 2, base_height + base_wall])
-    top();
+    mount_tabs();
 }
 
-base();
+top();