Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1981-03-04
1984-04-24
Hecker, Stuart N.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360109, G11B 556, G11B 2110
Patent
active
044451539
ABSTRACT:
A read/write head is fed to the location over a desired track by a usual access operation. Subsequently, the head undergoes an incremental movement from a base point where the head has been initially stopped, and in the course of such movement, a read operation is performed at each of any selected positions. An output level form each reading operation is stored in a memory in a patterned form. The stored pattern is then compared against a given reference which is chosen to serve as the criterion, and the head position throughout the incremental movement where the best output is read is detected. The read/write head is again moved to the detected position, followed by a normal read/write operation.
Head feed means is provided on which the read/write head is mounted and which is adapted to permit a usual access operation. The head feed means is itself a substantially integral form and is constructed to be incrementally movable in a direction to traverse the track. An apparatus for correcting a track misalignment of a floppy disc includes a cam which is driven by an intermittent feed mechanism and which has a cam surface disposed in abutment against a member (on which the read/write head is mounted) defining the support for the head feed means. The intermittent feed mechanism is operated each time the plunger associated with a solenoid moves in the vertical direction, thereby rotating the cam to cause an incremental movement of the read/write head in accordance with the displacement of the cam surface.
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Fujimoto Sakae
Hatsuno Masahiro
Hecker Stuart N.
Ricoh & Company, Ltd.
Shoup Guy W.
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