Super-8 to 16mm reel adapter. Used to hold Super-8 reels on the square reel holders of the JK optical printer. Will also work on rewinds.

models/s8_16mm_reel_adapter/s8_16mm_reel_adapter.scad

@@ -0,0 +1,49 @@
+
+time = 0;
+
+module s8_16mm_reel_adapter () {
+    BOTTOM_D = 20.53;
+    BOTTOM_H = 2;
+    D = 12.72;
+    H = 13;
+    SQUARE = 8;
+    TAPER = 1.4;
+    PEG_H = 4.9;
+    PEG_L = 3.18;
+    PEG_W = 1.5;
+    
+    $fn = 200;
+    
+    difference () {
+        union () {
+            cylinder(r = BOTTOM_D / 2, h = BOTTOM_H, center = true);
+            translate([0, 0, (BOTTOM_H / 2) + H / 2]) cylinder(r = D / 2, h = H, center = true);
+            translate([0, 0, (BOTTOM_H / 2) + H + (TAPER / 2)]) cylinder(r1 = D / 2, r2 = (D / 2) - TAPER, h = TAPER, center = true);
+        }
+        cube([SQUARE, SQUARE, 60], center = true);
+    }
+    for (i = [0 : 2]) {
+        rotate([0, 0, i * 120]) translate([0, (D / 2) + (PEG_L / 2) - (PEG_W / 2), (BOTTOM_H / 2) + (PEG_H / 2)]) cube([PEG_W, PEG_L, PEG_H], center = true);
+        rotate([0, 0, i * 120]) translate([0, (D / 2) + (PEG_L / 2) + (PEG_W / 2), (BOTTOM_H / 2) + (PEG_H / 2)]) cylinder(r = PEG_W / 2, h = PEG_H, center = true, $fn = 40);
+    }
+}
+
+module reel_reference () {
+    SQUARE = 7.95;
+    translate([0, 0, 12.3 - 1]) {
+        difference() {
+            union() {
+                translate([0, 0, -(12.3 / 2)]) cube([SQUARE, SQUARE, 12.3], center = true);
+                rotate([0, 90, 0]) cylinder(r = SQUARE / 2, h =8, center = true);
+                rotate([0, 90, 90]) cylinder(r = SQUARE / 2, h =8, center = true);
+            }
+            for (i = [0 : 4]) {
+                rotate([0, 0, i * 90]) translate([0, 4.9, 1]) rotate([12, 0, 0]) cube([SQUARE, 2, 10], center = true);
+            }
+        }
+        
+    }
+    translate([0, 0, (39 / 2)]) cylinder(r = 6.57 / 2, h = 39, center = true, $fn = 60);    
+}
+rotate([0, 0, time]) s8_16mm_reel_adapter();
+//color("red") translate([0, 0, -2])  reel_reference();