Method and means for capturing magnetic tracks

Details Method and means for capturing magnetic tracks Method and means for capturing magnetic tracks

1976-10-26

1979-01-09

Dobeck, B.

Electricity: motive power systems

Positional servo systems

Adaptive or optimizing systems including 'bang-bang' servos

318594, 360 75, G05B 1300

Patent

active

041340531

ABSTRACT:
In a disc drive which does not have a head position sensor but does have a velocity detector and off-track error detection means for sensing the distance and direction of the displacement of the head from the nearest track center, and in which the direction signal from the error detector is of one polarity for odd numbered tracks and of the opposite polarity for even numbered tracks, a system is provided for capturing a track on a blind seek which involves detecting deceleration of the head to below capture velocity, allowing the head to drift past the next track center while sensing whether that track is odd or even, and then initiating a capture of the next following track on the basis of whether the detected track is odd or even and the direction of seek.

REFERENCES:
patent: 3663880 (1972-05-01), Gabor
patent: 3812533 (1974-05-01), Kimuba et al.
patent: 3864740 (1975-02-01), Sordello et al.
patent: 3906326 (1975-09-01), Chur
patent: 4006394 (1977-02-01), Cuda et al.
patent: 4030132 (1977-06-01), Iftikar et al.
patent: 4068267 (1978-01-01), Inouye

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