Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1994-11-23
1996-09-03
Psitos, Aristotelis
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 7813, 360 75, G11B 5596
Patent
active
055529453
ABSTRACT:
A system for infallibly positioning a transducer on Track Zero on a flexible magnetic disk in the face of possible sensing errors by an optical Track Zero sensor customarily build into a disk drive. The transducer has not been correctly recalibrated if it has been positioned, when the disk drive is powered on, on an invalid track existing, either virtually or actually, immediately radially outwardly of Track Zero and if the disk drive is connected to a host that commands recalibration merely by causing transducer travel radially outwardly of the disk. A recalibration control circuit is therefore provided which cancels the host command and which, instead, causes the transducer to travel a predetermined distance radially inwardly of the disk and then to travel radially outwardly until the Track Zero sensor indicates again that the transducer is positioned on Track Zero.
REFERENCES:
patent: 4594620 (1986-06-01), Shoji et al.
patent: 5283702 (1994-02-01), Tsuyuguchi et al.
patent: 5303107 (1994-04-01), Miura et al.
Miura Tohru
Tsuyuguchi Hiroshi
Faber Alan
Psitos Aristotelis
Teac Corporation
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