Servo-rotatable Cat Head with slot for Distance Sensor

I initially made this as an alternative head for Petoi's robot dog Bittle, but it is equally compatible with standard hobby servos. The head has a diameter of 6 cm, and the collar is designed to be positioned at a 30 degree angle.

This model has 3 parts: 

- The collar has a 12 x 23 mm slot for a servo motor shaft to fit through, and gaps for wires at both sides of the servo. 
Compatible with SG90 hobby servos and Petoi servos.

- The head has hollow eyes and space to fit an ultrasonic distance sensor in. The head can be screwed onto the collar with 2 servo motor screws, or glued. 
Compatible with Ultrasonic Distance Sensors HC-SR04, HY-SRF05, and RUS-04.

- A detachable panel closes up the back of the head while keeping the sensor wires accessible.


Printing recommendations:

• Layer height 0.15 looks pretty good
• 3 walls for strength
• Wall printing order inside to outside for the sake of overhangs.
• 10% cubic infill or less: If you are going to mount it on the Bittle robot, you want it to be light, and position the robot's battery backwards as counterweight.
• Retraction on
• Combing on
• Support overhang angle 60 degrees
• 17% lines support for the head, everywhere. Set the support direction such that minimal support ends up in the eye sockets, because that is difficult to clean. A single wall of support is enough to print the eyes.
• The back panel does not require support.
• The collar only needs a little support for the ring
  
  

Hollow head and eyes to accommodate distance sensor, collar made to fit servo, removable back of head.