Mechanisms for a closed loop head positioner for streaming tape

Details Mechanisms for a closed loop head positioner for streaming tape Mechanisms for a closed loop head positioner for streaming tape

1992-08-06

1994-12-06

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7712, 360 7802, G11B 2102, G11B 5584

Patent

active

053716361

ABSTRACT:
Apparatus for fine positioning a tape head relative to a head carriage that is coarsely positionable by a lead screw. The fine positioning apparatus includes parallel first and second resilient support beams oriented generally parallel to the direction of tape travel and having their ends fixedly secured to the head carriage so as to be deflectable in a direction transverse to the direction of tape travel. The centers of the parallel first and second support beams have their centers secured to a tape head frame which contains the tape. A linear motor drives the tape head frame against the resilience of the first and second resilient support beams in response to a drive signal which, for example, is derived from tracking error information produced pursuant to reading of servo information on tape. Pursuant to the displacement of the tape head frame against the resilience of the support beams, the magnetic tape head is moved along a linear path transverse to the tape travel direction. For operation with tapes without servo information on tape, a piezoelectric transducer detects the deflection of one of the support beams and provides an output which is utilized to provide damping of the natural resonance the spring/mass system that includes the first and second resilient support beams and the tape head and tape head frame supported thereby. Alternatively, the operation with tapes without servo tracks can be open-loop with the damping being provided by damping members disposed symmetrically on either side of the tape head frame.

REFERENCES:
patent: 3526726 (1970-09-01), Corbett et al.
patent: 3575422 (1971-04-01), Peltz
patent: 3769467 (1973-10-01), Gabor
patent: 4924165 (1990-05-01), Kohno
patent: 5191492 (1993-03-01), Nayak et al.

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