Method and apparatus to improve the positioning accuracy of a tr

Details Method and apparatus to improve the positioning accuracy of a tr Method and apparatus to improve the positioning accuracy of a tr

1983-06-30

1985-12-03

Cardillo, Jr., Raymond F.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 78, G11B 2110, G11B 2108

Patent

active

045569215

ABSTRACT:
An apparatus to improve the positioning accuracy of an actuator in a disc system. The apparatus provides for accelerating and braking the actuator at appropriate times during positioning operations in order to accurately position the actuator at a selected track on the disc. In addition, in order to maintain positioning accuracy in the presence of run-out, provision is made for detecting the occurrence of run-out by comparing positioning accuracy at spaced time intervals and blocking actuator braking at those times when it would be counter-productive to positioning accuracy.

REFERENCES:
patent: 3808486 (1974-04-01), Cuda et al.
patent: 4030132 (1977-06-01), Iftikar et al.
patent: 4072990 (1978-02-01), Case et al.
patent: 4135217 (1979-01-01), Jacques et al.
patent: 4149201 (1979-04-01), Card
patent: 4268785 (1981-05-01), Svendsen

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