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Method-and-arrangement-for-precise-positioning-of-a-magnetic-head-to-various-tracks-of-a-magnetic-tape

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Method and arrangement for precise positioning of a magnetic head to various tracks of a magnetic tape

Details

Inventors: Rudi, Guttorm;
Assignee: Tandberg Data A/S (Oslo, NO)
Primary Examiner: Faber; Alan
Assistant Examiner: Garland; Steven R.
Attorney, Agent or Firm: Hill, Van Santen, Steadman & Simpson

For precise positioning of a magnetic head to various tracks of a magnetic tape, deviations occur as a consequence of manufacturing tolerances of the magnetic head, or as a consequence of the adjustment thereof. Correction values are identified wherein a read head identifies a center of a track recorded by a write head. A moving direction of the magnetic tape is reversed and the center of the track is identified again. The read head identifies the center of a track recorded by a neighboring write head. Positional values allocated to the center of the tracks are subtracted from the positional value of the write head.

DETAILED DESCRIPTION It is an object of the invention to specify a method and an arrangement given the employment of which a precise positioning of the magnetic head to various tracks of the magnetic tape is also possible when the magnetic head has small imprecisions in the arrangement of at least one write head and of a corresponding read head, and, under given conditions, is likewise not precisely adjusted.
In the method of the type initially cited, this object is achieved by recording signals in one track by use of the write head on the moving magnetic tape without having the write head moving.
A first positional value of the magnetic head is stored.
By use of the read head, a center of said one track is identified by moving the magnetic head perpendicular to a moving direction of the magnetic tape.
A corresponding second positional value of the magnetic head is identified.
A first correction value is identified from a difference of the first and second positional values.
The first correction value is utilized for positioning the magnetic head to the various tracks.

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