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Isolation of Actuator Arm From Coil in a Disk File Voice Coil Motor for Reduction of Radial Resonances

IP.com Disclosure Number: IPCOM000061606D
Original Publication Date: 1986-Aug-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Tamhane, SK: AUTHOR

Abstract

In a data recording disk file which uses a voice coil motor (VCM) as a linear actuator for moving the read/write head to the selected data tracks, the movable coil is attached to a carriage/arm assembly which supports the read/write heads and moves through a fixed magnetic armature assembly. The carriage/arm assembly is attached to the coil along the central axis of the coil, which corresponds to the direction of track accessing, by a central column and to the coil periphery by side braces. The primary force component is transmitted to the carriage/arm assembly through the central column along the central axis of the coil.

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Isolation of Actuator Arm From Coil in a Disk File Voice Coil Motor for Reduction of Radial Resonances

In a data recording disk file which uses a voice coil motor (VCM) as a linear actuator for moving the read/write head to the selected data tracks, the movable coil is attached to a carriage/arm assembly which supports the read/write heads and moves through a fixed magnetic armature assembly. The carriage/arm assembly is attached to the coil along the central axis of the coil, which corresponds to the direction of track accessing, by a central column and to the coil periphery by side braces. The primary force component is transmitted to the carriage/arm assembly through the central column along the central axis of the coil. The transmission of the primary force component through the central column can be increased and the resonant frequency at the outer periphery side braces reduced by using damping material at the locations where the side braces of the carriage/arm assembly attach to the coil. The use of damping tape or other suitable damping material at the side brace connections reduces the radial resonance and improves actuator performance, especially when used with coils which have a rectangular cross section.

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