Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1987-02-13
1991-02-12
Psitos, Aristotelis M.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 75, 360 7704, 360135, 360 76, G11B 555, G11B 5596, G11B 2336
Patent
active
049928937
ABSTRACT:
An alignment disk having an adjust signal recorded thereon to maintain data interchangeability of a magnetic disk drive apparatus and loadable and unloadable to and from the magnetic disk drive apparatus, and method and apparatus for verifying a tracking errors of the magnetic disk drive apparatus are disclosed; the magnetic disk drive apparatus including magnetic head means for recording and reproducing data on and from a magnetic recording medium, a head carriage for carrying the magnetic head means, and drive means for driving the head carriage radially of a track of the magnetic recording medium; the alignment disk having a set of track diameter adjust signal pairs recorded on tracks equal to or larger in number than the number of phases of a stepping motor for driving the head carriage and corresponding to at least the excitation phases of the stepping motor; the set of track diameter adjust signal pairs each having an inner track signal and an outer track signal extending inward and outward from a center of the track; and the set of track diameter adjust signal pairs being arranged symmetrically about a rotation axis of the disk.
REFERENCES:
patent: 4084201 (1978-04-01), Hack et al.
patent: 4325134 (1982-04-01), Langley et al.
patent: 4371904 (1983-02-01), Brooke
patent: 4458274 (1984-07-01), Charlson et al.
patent: 4513331 (1985-04-01), Baker et al.
patent: 4542428 (1985-09-01), Yanagi
patent: 4623942 (1986-11-01), Kraus et al.
patent: 4694359 (1987-09-01), Oya
patent: 4775902 (1988-10-01), Trouato et al.
IBM TDB, vol. 17, No. 11 "Eccentricity Tolerant Head Alignment Check", Sibbers, 4/75, pp. 3415-3416.
Enomoto Junichi
Hatakeyama Tetsuro
Hayashi Sei-ichi
Ishida Hitoshi
Kanai Hiroshi
Garland Steven R.
Hitachi , Ltd.
Psitos Aristotelis M.
LandOfFree
Alignment disk for magnetic disk driving apparatus and method an does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Alignment disk for magnetic disk driving apparatus and method an, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Alignment disk for magnetic disk driving apparatus and method an will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-24645