Polar Scanner

This is a ultrasonic sensor mount. Intended use is to build a 3D model of the environment around it from polar coordinates.

I'm re-using models for the following sensor and motors, simplified and made slightly larger so they can fit in the printed frame.
* 28BYJ-48 Stepper
* TowerPro SG90 Servo
* HC-SR04 Ultrasonic sensor

This is work in progress. There are 4 modules that should be printed separately, and screwed to the sensor or motor they hold.
* **base** holds the stepper
* **tigeservo** supports the servo holder
* **servoholder** holds the servo
* **sensorholder** holds the sensor

The [arduino controller](https://github.com/lyriarte/polar-scanner) and [esp-01 chatbot](https://github.com/lyriarte/wifi-serial) code is on GitHub.