Patent ID: 7816881

Claim:
A servo system, comprising: a. a housing assembly; b. an energizable stator supported by the housing assembly; c. a shaft rotatably mounted within the housing assembly, the shaft being coupled to a rotor having a first magnet and which is magnetically driven, wherein rotation is imparted to the rotor and thereby to the shaft when the stator is energized; d. a rotary to linear conversion device connected to the shaft; e. a second magnet mounted on the shaft; f. a plurality of analog Hall sensors mounted on the housing assembly for sensing the second magnet, wherein the sensors each provide an output signal; g. a controller for energizing the stator and for receiving the output signals, wherein the controller determines the position of the second magnet with respect to the stator from the output signals, and the speed and position of the rotor is controlled from that information; and h. a memory for storing a user defined motion program, the motion program including a sequence of move profile instructions, wherein the controller executes the instructions from the memory in the programmed sequence to control the motion of the servo system.