Method for generating digital actual velocity signals

Details Method for generating digital actual velocity signals Method for generating digital actual velocity signals

1979-07-25

1981-08-04

Wolff, John H.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 53, G11B 2102

Patent

active

042825539

ABSTRACT:
A method for generating digital actual velocity signals in a positioning system for the write/read heads of a magnetic disk storage utilizes a position signal received from a servo-head to derive digital signals having edges marking the data track centers. Reset signals for a digital counter counted up by clock pulses are formed from the digital position signals and, upon recognition of a zero passage of the position signal, the content of the counter is sampled and the counter is reset. The position signal is then compared with a stored optimum deceleration curve and a coil is operated through a series of gates to appropriately position the write/read heads.

REFERENCES:
patent: 3511151 (1970-05-01), Hillman
patent: 3820712 (1974-06-01), Oswald

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