Tracking device using multiple piezoelectric elements for track centering

摘要

A tracking device comprises a frame having a pair of opposed legs, a magnetic head disposed midway between the pair legs and a pair of piezoelectric members sandwiching the magnetic head and clamped together with the head between the two legs of the frame. Opposite polarity voltages are applied to the piezoelectric members according to tracking information. The applied voltages cause expansion and contraction of the piezoelectric members to effect tracking control of the head.