Interactive servo control system for use with a rotating-head ma

Details Interactive servo control system for use with a rotating-head ma Interactive servo control system for use with a rotating-head ma

1976-10-05

1977-08-23

Wolff, John H.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Synchronizing moving-head moving-record recorders

360 36, 360 73, 360 77, 360 84, H04N 5795, G11B 2104

Patent

active

040443884

ABSTRACT:
A servo control system provides interactive correction for both tracking and time base errors in a signal reproduced by a rotating playback head from magnetic tape. A tracking control head overlapping adjacent slant tracks provides a signal to a capstan servo for correcting positional errors. Time base errors are corrected by controlling a head servo with respect to variations in the incoming signal time base sensed by the playback head. By mounting both heads on the same head wheel, the head servo control provided by the playback signal has an interactive effect on the tracking sensor: with the playback head wheel moving at the correct speed to eliminate time base error, the tracking sensor will "pull" the tape into precise tracking alignment by adjustment of the capstan servo. With the tape and head replicating their exact counterpart speeds obtained during record, skew at the point of head switching is automatically eliminated.

REFERENCES:
patent: 3375331 (1968-03-01), Masatoshi et al.
patent: 3549797 (1970-12-01), Dann
patent: 3838453 (1974-09-01), Buslik
patent: 3959815 (1976-05-01), Rotter

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