 
 <prompt> Wetin dey make di system work? Based on di previous question, write a context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: "A servo system dey different from some stepper motor applications because the position feedback dey continuous while the motor dey run; a stepper system dey rely on the motor not to "miss steps" for short term accuracy, although a stepper system fit include a "home" switch or other element to provide long-term stability of control. For example, when a typical dot matrix computer printer dey start up, its controller go make the print head stepper motor drive go its left-hand limit, where a position sensor go define home position and stop stepping. As long as power dey on, a bidirectional counter for the printer's microprocessor go dey keep track of print-head position." 