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Spatial Flexure Mechanism

IP.com Disclosure Number: IPCOM000046291D
Original Publication Date: 1983-Jun-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 58K

Publishing Venue

IBM

Related People

Nishihira, HS: AUTHOR

Abstract

The structure described provides a means of counterbalancing an air bearing slider used in magnetic recording which aids in the reduction of pitch, roll, and vertical excursions during track-seek operations and jitter-mode suspension excitations.

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Spatial Flexure Mechanism

The structure described provides a means of counterbalancing an air bearing slider used in magnetic recording which aids in the reduction of pitch, roll, and vertical excursions during track-seek operations and jitter-mode suspension excitations.

It is desirable to locate the pivot point about which gimbaling occurs at the slider's center of mass. This counterbalancing of the slider will provide for any inertia force to act through the pivot point. The elimination of the moment arm (distance between pivot and center of mass) acts to delete the potential torque which could have caused roll, pitch, and vertical excursions from the slider's steady- state flying attitude. Minimizing these excursions reduces the probability of slider-disk contact, thus improving disk file reliability.

The present structure counterbalances a slider by means of a spatial (three-dimensional) flexure mechanism, as shown schematically in Fig. 1. The linkage mechanism is composed of an articulating plate and a fixed plate connected by four rigid links tied at each of the eight corners by a flexible joint. The 12 segments (R1, R2,....R12) are sized such that the mechanism's instantaneous center of rotation coincides with the slider's center of mass attached to the articulating plate in the neutral position (roll=pitch=0). The slider is thus counterbalanced since the mechanism acts to project a phantom pivot point within the slider at the center of mass (Fig. 2).

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