The Motion Control library supplies you with a set of non-blocking functions for advanced position and speed control of servos. 

The library currently generates Linear motion profiles (constant speed, infinite acceleration/deceleration). Trapezoidal motion profiles will be added in the future (constant speed, constant acceleration/deceleration).

A HITI Servo lets you control the position and speed of 1 servo.

To use HITI Servos :

#include <HC_Servo.h>

A HITI Motor Group allows you to synchronize motions of several Servos.

To use HITI Motor Groups :

#include <HC_MotorGroup.h>