Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1979-06-15
1981-03-17
Eddleman, Alfred H.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
318561, 318653, 360 77, G11B 2108, G05B 1300
Patent
active
042570743
ABSTRACT:
A time optimal function generator in a coarse positioning system for magnetic heads in a magnetic disc device is designed to accelerate the magnetic heads as rapidly as possible to the exact point at which they must decelerate as rapidly as possible to stop at the new track location when moving from an old track location. This device uses as an input the output of a difference register which contains the difference between the present track address and the new track address. The system is designed to control the servo transducer positioning system in a generally linear fashion as it approaches the new track address but in a square root fashion when the difference is large. The system contains a square root response portion and a linear response portion with weighting devices to control the proportional response of the system.
REFERENCES:
patent: 3209338 (1965-09-01), Romuari
patent: 3399391 (1968-08-01), Barrosse
patent: 3699555 (1972-10-01), Du Vall
patent: 4030132 (1977-06-01), Iftikar
patent: 4168457 (1979-09-01), Rose
Eddleman Alfred H.
Magnetic Peripherals Inc.
McGinnis William J.
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