Rotary head type magnetic recording/reproducing apparatus employ

Details Rotary head type magnetic recording/reproducing apparatus employ Rotary head type magnetic recording/reproducing apparatus employ

1994-07-21

2000-09-05

Loomis, Paul

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

G11B 5588

Patent

active

061152048

ABSTRACT:
A rotary head type magnetic recording/reproduction apparatus according to the present invention includes a recording format in which a plurality of pilot signals of different frequencies are recorded to be superimposed sequentially on a main signal for every other track. The magnetic recording/reproduction apparatus includes a single head structure where a plurality of magnetic heads are attached to a plurality of actuators in a one-to-one correspondence. For one magnetic head detecting a relative position error signal out of the plurality of magnetic heads, dynamic tracking under closed loop control is carried out. For another magnetic head that does not detect a relative position error signal, open loop control or semi-closed loop control is carried out according to information concerning the amount of displacement of the one magnetic head. Thus, a magnetic recording/reproduction apparatus is provided that allows highly accurate dynamic tracking without providing many pilot signal generation means and without reducing the manufacturing yield of a head drum.

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patent: 5404252 (1995-04-01), Nagasawa et al.
patent: 5404255 (1995-04-01), Kobayashi et al.

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