Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
Patent
1994-08-30
1996-05-28
Tupper, Robert S.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Drum record
360109, G11B 555, G11B 556
Patent
active
055217788
ABSTRACT:
A secondary actuator for increased positional resolution of a read/write head for a DASD is disposed on the distal end of an actuator arm and acts to pivotally move the load beam about the attachment axis. The actuator is comprised of a ring structure on the end of the load beam with the ring structure attached to a central hub through a plurality of spokes. The central hub is fixedly attached to the distal end of the actuator arm for the DASD. Relative motion between the actuator arm and the load beam is accomplished by causing a deflection in one or more of the spokes. The deflection may be caused by piezo-electric transducer elements which are attached to the sides of at least two spokes. Signals sent to the piezo-electric transducer elements will cause bending of the piezoelectric transducer elements and the attached spoke and thus rotationally displace the junction of the spoke and the ring about the central hub. This arrangement permits increasing the fine resolution of the recording tracts on a DASD disk by accommodating the stiction forces which limit the resolution of the actuator and eliminating stiction forces as a factor for the secondary actuator.
REFERENCES:
patent: 4374402 (1983-02-01), Blessom et al.
patent: 4764829 (1988-08-01), Makino
patent: 4814908 (1989-03-01), Schmitz
patent: 4858040 (1989-08-01), Hazebrouck
patent: 5189578 (1993-02-01), Mori et al.
IBM Technical Disclosure Bulletin, vol. 31, No. 2, Jul. 1988, pp. 220-221 Head Access Mechanism.
Boutaghou Zine-Eddine
Ottesen Hal H.
Davis David D.
International Business Machines - Corporation
Letson Laurence R.
Tupper Robert S.
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