| 摘要 |
<p>An apparatus for centering a transducer (24) over a track (16) of a magnetic disk (12), comprises an arm (10) having a first end (20) attached to an actuator for rotating the arm and a second end (18) attached to a slider (23) which carries the transducer (24). The arm has first and second arm portions (26, 28) extending between the first and second ends (18, 20) and being spaced apart at the first end. Heating elements (30, 32) selectively apply thermal energy to the first and second arm portions (26, 28) to cause selected thermal expansion in the first and second arm portions causing the arm portions to bend and move the slider (23) along an arcuate path in a plane substantially parallel to that of the disk (12) and substantially transverse to the track (16) to position the transducer (24) over the centre of the track.</p> |
