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Rotary Actuator Hda With Servo and Data Arm Designs

IP.com Disclosure Number: IPCOM000099198D
Original Publication Date: 1990-Jan-01
Included in the Prior Art Database: 2005-Mar-14
Document File: 2 page(s) / 73K

Publishing Venue

IBM

Related People

Best, JS: AUTHOR [+2]

Abstract

The figure illustrates the plan view of a disk and rotary actuator wherein the actuator contains a arm of different design than the data-head arms. data-head arms are longer than the servo- head arm. The arms are made the appropriate length to minimize skew angle (and/or the variation in skew angle across data band) between the data heads and the tracks on the The design of the data arms and the attachment of the sliders to the arms are done so as to make the head and the magnetoresistive (MR) read head (of an write/MR-read head-slider-device) both aligned over the data tracks to the best practical, such that the separation between the read write elements the skew of the heads to the track causes the practical contribution to misregistration of the track to the write track.

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Rotary Actuator Hda With Servo and Data Arm Designs

       The figure illustrates the plan view of a disk and rotary
actuator wherein the actuator contains a arm of different design than
the data-head arms. data-head arms are longer than the servo- head
arm.  The arms are made the appropriate length to minimize skew angle
(and/or the variation in skew angle across data band) between the
data heads and the tracks on the  The design of the data arms and the
attachment of the sliders to the arms are done so as to make the head
and the magnetoresistive (MR) read head (of an write/MR-read
head-slider-device) both aligned over the data tracks to the best
practical, such that the separation between the read write elements
the skew of the heads to the track causes the practical contribution
to misregistration of the track to the write track.  This head/arm
design and will maximize the linear bit density and signal by
minimizing skew, and will tend to maximize density by minimizing the
track misregistration due to separation between the read and write
elements on the

      The above design and assembly will cause a servo however,
because as such a head/arm assembly sweeps the recording band, there
will be a phase difference transitions on adjacent tracks (sometimes
called This phase difference would cause an erroneous signal to a
servo channel because the servo signal is from the read head as the
read head straddles two tracks.

      On a dedicated servo surface, h...