Vacuum pick and place head for 3-axis machine v0.0

This is a vacuum pick-and-place head design for automated electronic assembly. It features a stepper-driven rotary head with Luer-Lock port for interchangeable needles, and a feature for attachment of an \"eyeball\" style Webcam for optical placement (you can modify to support your own favorite camera). Vacuum is provided to the head via flex (fishpump) tubing.