// https://gitorious.org/ozzloy/challenge-bot
// https://github.com/waynegramlich/challenge-bot
-// sonar sensor measurements from https://www.thingiverse.com/thing:92869,
-
// 3/8 inch in mm
deck_depth = 4.7625;
sonar_plate_width = 20;
sonar_plate_length = 45;
-sonar_sensor_radius = 8;
+// sonar sensor measurements taken with calipers:
+// 9.6 in between, 41.33 outside, 15.82 diameter
+// measured diameter of 15.82 with calipers,
+// but when printed ends up being too small
+sonar_sensor_radius = 15.82 / 2 + 0.3;
sonar_sensor_height = 13.8;
+between_sensor_centers = 15.82 + 9.6;
+
sonar_holder_length = sonar_plate_length + 10;
sonar_holder_width = sonar_plate_width + 3;
sonar_holder_depth = 3;
-between_sensor_centers = 27;
+
module sensors(){
translate([between_sensor_centers / 2, 0, 0]){