Predictive positioning offset compensation for high TPI disk sys

Details Predictive positioning offset compensation for high TPI disk sys Predictive positioning offset compensation for high TPI disk sys

1986-11-07

1989-01-31

Cardillo, Raymond F.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 75, 360 7808, G11B 558, G11B 2110

Patent

active

048020338

ABSTRACT:
Trackwise disparity between inductive record and magneto-resistive playback heads which are built on a common support is measured and memorized. Thereafter, during head-positioning, the memorized disparity is employed as a track-address bias for proper registration of the playback head, irrespective of its widthwise disparity relative to the record head. To achieve the aforesaid measurement, the invention provides for a self-calibrating algorithmic routine that generates the aforesaid bias.

REFERENCES:
patent: 4040103 (1977-08-01), White
patent: 4207601 (1980-06-01), Desai et al.
patent: 4698702 (1987-10-01), Miyake
IBM Technical Disclosure Bulletin, vol. 17, No. 6, Nov. 1974, A. Paton, Correction of Data Track Misregistration in . . . , pp. 1781-1783.

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