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Runout Characteristics of Flexible Disks by a New Head-Pad Combination Model

Runout (dynamic deflection) of both a Co-Cr/permalloy flexible disk A, and a commercialized particulate flexible disk B, both with diameter 3.5", was studied using a disk drive with two pairs of pads arranged in series relative to the disk rotating direction, and with a photometric positioning senso... Full description

Journal Title: IEEE Translation Journal on Magnetics in Japan February 1989, Vol.4(2), pp.121-127
Main Author: Kadokura, S
Other Authors: Kamei, K , Goto, Y , Sobajima, S
Format: Electronic Article Electronic Article
Language: English
Subjects:
Quelle: IEEE Conference Publications
ID: ISSN: 0882-4959 ; E-ISSN: 2375-0545 ; DOI: 10.1109/TJMJ.1989.4563972
Link: https://ieeexplore.ieee.org/document/4563972
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recordid: ieee_s4563972
title: Runout Characteristics of Flexible Disks by a New Head-Pad Combination Model
format: Article
creator:
  • Kadokura, S
  • Kamei, K
  • Goto, Y
  • Sobajima, S
subjects:
  • Magnetic Heads
  • Disk Drives
  • Atmospheric Modeling
  • Commercialization
  • Photometry
  • Disk Recording
  • Sensor Phenomena and Characterization
  • Magnetics Society
  • Electronic Equipment Testing
  • Elasticity
  • Engineering
  • Physics
ispartof: IEEE Translation Journal on Magnetics in Japan, February 1989, Vol.4(2), pp.121-127
description: Runout (dynamic deflection) of both a Co-Cr/permalloy flexible disk A, and a commercialized particulate flexible disk B, both with diameter 3.5", was studied using a disk drive with two pairs of pads arranged in series relative to the disk rotating direction, and with a photometric positioning sensor in place of a single-pole miniature head. In the drive, the radial position of the sensor over the disk was varied between 30 and 37 mm at disk revolution rates ranging from 400 to 1200 rpm, to evaluate the effect of the pad configuration on the runout characteristics. The runout of disk A was suppressed to between 15 and 30 μm, while that of disk B was almost unchanged at more than 60 μm. Stable read/write characteristics of disk A were observed in the high-density region near 70 kfci under a head pressure of 1 gf and runout of about 20 μm.
language: eng
source: IEEE Conference Publications
identifier: ISSN: 0882-4959 ; E-ISSN: 2375-0545 ; DOI: 10.1109/TJMJ.1989.4563972
fulltext: fulltext
issn:
  • 0882-4959
  • 08824959
  • 2375-0545
  • 23750545
url: Link


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subjectMagnetic Heads ; Disk Drives ; Atmospheric Modeling ; Commercialization ; Photometry ; Disk Recording ; Sensor Phenomena and Characterization ; Magnetics Society ; Electronic Equipment Testing ; Elasticity ; Engineering ; Physics
descriptionRunout (dynamic deflection) of both a Co-Cr/permalloy flexible disk A, and a commercialized particulate flexible disk B, both with diameter 3.5", was studied using a disk drive with two pairs of pads arranged in series relative to the disk rotating direction, and with a photometric positioning sensor in place of a single-pole miniature head. In the drive, the radial position of the sensor over the disk was varied between 30 and 37 mm at disk revolution rates ranging from 400 to 1200 rpm, to evaluate the effect of the pad configuration on the runout characteristics. The runout of disk A was suppressed to between 15 and 30 μm, while that of disk B was almost unchanged at more than 60 μm. Stable read/write characteristics of disk A were observed in the high-density region near 70 kfci under a head pressure of 1 gf and runout of about 20 μm.
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Runout (dynamic deflection) of both a Co-Cr/permalloy flexible disk A, and a commercialized particulate flexible disk B, both with diameter 3.5", was studied using a disk drive with two pairs of pads arranged in series relative to the disk rotating direction, and with a photometric positioning sensor in place of a single-pole miniature head. In the drive, the radial position of the sensor over the disk was varied between 30 and 37 mm at disk revolution rates ranging from 400 to 1200 rpm, to evaluate the effect of the pad configuration on the runout characteristics. The runout of disk A was suppressed to between 15 and 30 μm, while that of disk B was almost unchanged at more than 60 μm. Stable read/write characteristics of disk A were observed in the high-density region near 70 kfci under a head pressure of 1 gf and runout of about 20 μm.

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Runout (dynamic deflection) of both a Co-Cr/permalloy flexible disk A, and a commercialized particulate flexible disk B, both with diameter 3.5", was studied using a disk drive with two pairs of pads arranged in series relative to the disk rotating direction, and with a photometric positioning sensor in place of a single-pole miniature head. In the drive, the radial position of the sensor over the disk was varied between 30 and 37 mm at disk revolution rates ranging from 400 to 1200 rpm, to evaluate the effect of the pad configuration on the runout characteristics. The runout of disk A was suppressed to between 15 and 30 μm, while that of disk B was almost unchanged at more than 60 μm. Stable read/write characteristics of disk A were observed in the high-density region near 70 kfci under a head pressure of 1 gf and runout of about 20 μm.

pubIEEE
doi10.1109/TJMJ.1989.4563972
date1989-02