Abstract
A conventional spin-stand system which used to evaluate read-write performance of magnetic recording heads and media can not allow thermal drift of its mechanism and NRRO (non-repeatable run out) of its air spindle motor. Therefore, we proposed a precise track following actuator which was a piggyback style for the spin-stand system. The actuator consists of a piezoelectric element (PZT) and a stroke amplifying mechanism. We propose the design method of a PID controller to realize a specified servo bandwidth and improve the property of the high frequency region of the PID controller. The effectiveness of the proposed method is illustrated by the simulation and experiment results.
