System for processing a product during rotation

A system for processing a product during rotation, the system comprising:

• a tool configured to perform a process on the product;
• a rotor assembly including a rotor, the rotor being configured to support the product, and a stator including at least one actuator configured to exert magnetic torque on the rotor so as to angularly displace the rotor about a central axis;
• a tool controller configured to operate the tool, to transmit a speed request signal including a desired rotation speed of the rotor, and to transmit a control pulse having a threshold value repeating at the expiration of a pulse period, the pulse period being proportional to a desired period of rotation of the rotor at the desired rotation speed of the speed request signal;
• and
• a rotor controller configured to receive the speed request signal, to control the at least one actuator of the stator such that the rotor angularly displaces at the desired rotation speed, to transmit a rotor position pulse and/or rotor phase information to the tool controller once every predetermined angular displacement of the rotor, to calculate an expected time of position pulse transmission based on the desired speed from the speed request signal, to compare the time the rotor angular position pulse is transmitted to the expected time of position pulse transmission once every predetermined angular displacement of the rotor and to adjust the rotation speed of the rotor when there is a difference between the time the rotor angular position pulse is transmitted and the expected time of position pulse transmission.