Pan Tilt Mechanism - Version B

## Pan Tilt Mechanism - Version B

A lightweight and a less bulkier version of [Pan Tilt Mechanism - Version A](https://www.thingiverse.com/thing:4683961)

For Raspberry Pi Camera V2.

### Why ?
It's predecessor ["Version" A](https://github.com/inertiarobotics/Pan-Tilt-Camera-A) was more bulky. Needed a lightweight design, with some compromise on stability.

### Why [Version A](https://github.com/inertiarobotics/Pan-Tilt-Camera-A) ?
The widely available pan tilt mechanism kits sold by adafruit, sparkfun or piromoni (https://www.sparkfun.com/products/14391) are quite cheap and handy to setup - which is great, but lack to offer stability, when the weight of the camera is raised due to additional lense attachments. The servo necks rattles and wiggles under motion. This design uses bearings at pan and tilt positions to offer a stabler design. The 1" bearing at the pan level secures the pan servo neck in place and prevents vertical jerky motions - suitable for robotic application