temp

modules/wafer.scad

@@ -2,10 +2,17 @@
 
 
 // [TODO] try add the flat edge on to the wafer
-module wafer(d) {
+module wafer(d, exposure_size=3*25.4) {
     if ($preview) {
         color([128/255, 128/255, 128/255])
         translate([0, 0, -1])
         circle(r=d/2);
+
+        color([255/255, 128/255, 128/255, 50/255])
+        translate([0, 0, 3])
+        difference() {
+            circle(r=d/2);
+            circle(r=exposure_size/2);
+        }
     }
 }