JPS6258471A - Slider floating characteristic measuring method for magnetic disk - Google Patents

Slider floating characteristic measuring method for magnetic disk

Info

Publication number
JPS6258471A
JPS6258471A JP19911585A JP19911585A JPS6258471A JP S6258471 A JPS6258471 A JP S6258471A JP 19911585 A JP19911585 A JP 19911585A JP 19911585 A JP19911585 A JP 19911585A JP S6258471 A JPS6258471 A JP S6258471A
Authority
JP
Japan
Prior art keywords
disk
slider
sensor
floating
revolutions
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP19911585A
Other languages
Japanese (ja)
Other versions
JPH0363152B2 (en
Inventor
Shoichi Nagamura
長村　正一
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP19911585A priority Critical patent/JPS6258471A/en
Publication of JPS6258471A publication Critical patent/JPS6258471A/en
Publication of JPH0363152B2 publication Critical patent/JPH0363152B2/ja
Granted legal-status Critical Current

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  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

PURPOSE:To estimate the slider floating characteristic concerning the whole surface of a magnetic disk by shifting a floating slider of a magnetic head over the whole of the radius of the disk while the slider is rotated by the low number of revolutions, measuring the output of an acoustic emission sensor fitted to a magnetic head arm and next, executing the same measurement to rotate the magnetic disk successively by the higher number of revolutions. CONSTITUTION:A disk 1 is low rotated by a rotating shaft 7. Then, a moving stage 5 is shifted at the range of the radius as a whole of the disk in the direction of an arrow 8, the vibration of a floating slider 2 is detected through an arm 3 by an AE sensor 4 and the signal processing is executed by a signal processing device 6. Further, the number of revolutions is raised and the same operation is executed. When the relation of the size of the output signal of the AE sensor 4 and the floating height is obtained by using the glass disk, etc., beforehand, the number of revolutions is gradually raised, the measurement of the AE sensor output is repeated, and thereby, the floating characteristic of the whole of the surface of the disk 1 can be measured.

Description

【発明の詳細な説明】[Detailed description of the invention] 【発明の属する技術分野】[Technical field to which the invention pertains]

本発明は、非磁性基板上に磁性層を有し、磁気ヘッドの
浮動スライダによって高密度記録を行う磁気ディスクの
浮動スライダの浮上特性を測定する方法に関する。The present invention relates to a method for measuring the flying characteristics of a floating slider of a magnetic disk that has a magnetic layer on a nonmagnetic substrate and performs high-density recording using the floating slider of a magnetic head.

【従来技術とその問題点】[Prior art and its problems]

従来磁気ディスクの浮上特性を測定するには、磁気ヘッ
ドアームにアコースティック・エミツシヨン・センサ（
以下ＡＥセンサと記す）を取り付け、ディスクの回転数
を徐々に上げて、先端に取付けられた浮動スライダへの
ディスクの接触あるいはディスクの回転により生ずる気
流の作用によってアームが振動することに基づ＜ＡＥセ
ンサからの出力信号を、実効値電圧計等で読むことによ
って行っていた。しかしこのようにして得られる浮上特
性は、浮動スライダの幅に相当するディスク部分のみに
ついての評価しか行えないため、ディスク面全体の評価
ができないという欠点があった。Conventionally, to measure the flying characteristics of magnetic disks, an acoustic emission sensor (
(hereinafter referred to as AE sensor) is attached, the rotation speed of the disk is gradually increased, and the arm vibrates due to the contact of the disk with the floating slider attached to the tip or the action of the airflow generated by the rotation of the disk. This was done by reading the output signal from the AE sensor with an effective value voltmeter or the like. However, the flying characteristics obtained in this manner can only be evaluated for a portion of the disk corresponding to the width of the floating slider, and therefore have the disadvantage that the entire disk surface cannot be evaluated.

【発明の目的】[Purpose of the invention]

本発明は、上述の欠点を除去して磁気ディスク全面につ
いてのスライダ浮上性が評価できる浮上特性測定方法を
提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a method for measuring flying characteristics that can eliminate the above-mentioned drawbacks and evaluate the flying characteristics of a slider over the entire surface of a magnetic disk.

【発明の要点】[Key points of the invention]

本発明によれば、磁気ディスクを低い回転数で回転させ
ながら磁気ヘッドの浮動スライダをディスクの半径全体
にわたって移動させて磁気ヘソドアームに取り付けられ
たＡＥセンサの出力を測定し、次いで磁気ディスクを順
次より高い回転数で回転させて同様の測定を行う操作を
繰り返すことにより、ディスク面全体についての浮上特
性の評価をすることが可能となって上記の目的を達成す
る。According to the present invention, the floating slider of the magnetic head is moved over the entire radius of the disk while rotating the magnetic disk at a low rotational speed, and the output of the AE sensor attached to the magnetic head arm is measured, and then the magnetic disk is sequentially rotated. By repeating the operation of rotating at a high rotational speed and making similar measurements, it becomes possible to evaluate the flying characteristics of the entire disk surface, thereby achieving the above objective.

【発明の実施例】[Embodiments of the invention]

第１図は本発明の一実施例のための装置を示し、測定す
べき磁気ディスクｌは回転軸７に取り付けられている。 ディスク１の面に対向配室された磁気ヘッドの浮動スラ
イダ２を支持するアーム３には、ＡＥセンサ４が取付け
られている。ＡＥセンサ４は信号処理装置６に接続され
ている。アーム３は可動ステージ５に固定されており、
矢印８で示すようにディスクｌの半径方向に移動させる
ことができる。このような装置を用い、ディスクｌを回
転軸７により低回転させる。その時に可動ステージ５を
矢印８の方向にディスクの半径全体の範囲で移動させ、
浮動スライダ２の振動をアーム３を介してＡＥセンサ４
で検出し、信号処理装置６で信号処理を行う、さらに回
転数を上げ同様の操作を行う、ＡＥセンサ４の出力信号
の大きさと浮上高さとの関係を予めガラスディスクなど
を用いて求めておけば、回転数を次第に上げてＡＥセン
サ出力の測定を繰り返すことによりディスク１の面全体
の浮上特性測定が行える。その際ある回転数以上で浮動
スライダ２は低浮上となり、アーム３をディスク半径方
向に移動させるとディスク１の面に浮上量販上の突起が
存在すれば浮動スライダ２が接触するので突起の検出も
ディスク面全体について行うことができる。FIG. 1 shows an apparatus for an embodiment of the invention, in which a magnetic disk l to be measured is attached to a rotating shaft 7. In FIG. An AE sensor 4 is attached to an arm 3 that supports a floating slider 2 of a magnetic head, which is arranged opposite to the surface of the disk 1. The AE sensor 4 is connected to a signal processing device 6. The arm 3 is fixed to a movable stage 5,
It can be moved in the radial direction of the disk l as shown by arrow 8. Using such a device, the disk 1 is rotated at a low speed by the rotating shaft 7. At that time, move the movable stage 5 in the direction of the arrow 8 over the entire radius of the disk,
The vibration of the floating slider 2 is transmitted to the AE sensor 4 via the arm 3.
The relationship between the magnitude of the output signal of the AE sensor 4 and the flying height must be determined in advance using a glass disk or the like. For example, the flying characteristics of the entire surface of the disk 1 can be measured by gradually increasing the rotational speed and repeating the measurement of the AE sensor output. At that time, the floating slider 2 becomes low in the air above a certain number of rotations, and when the arm 3 is moved in the disk radial direction, if there is a protrusion on the surface of the disk 1 due to the flying height, the floating slider 2 will come into contact with it, making it possible to detect the protrusion. This can be done on the entire disk surface.

【発明の効果】【Effect of the invention】

本発明は、浮動スライダを磁気ディスクが同一回転数で
回転している間にディスクの半径方向に移動させること
によりディスク面全体の浮上特性の測定を可能にするも
ので、また浮動スライダが低浮上にある回転数において
浮動スライダを半径方向に移動させることにより、ディ
スク面全体の突起の検出も同時に行うことができる効果
を存する。The present invention makes it possible to measure the flying characteristics of the entire disk surface by moving the floating slider in the radial direction of the disk while the magnetic disk is rotating at the same rotation speed. By moving the floating slider in the radial direction at a certain rotation speed, there is an effect that protrusions on the entire disk surface can be detected at the same time.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の一実施例のための装置の断面図である
。 １：Ｍ１気ディスク、２：浮動スライダ、３：アーム、
４：ＡＥセンサ、５：可動ステージ、６：ＡＥセンサ信
号処理装！。 １．１１、；、＋’　１．’４　、、Ｌ、、　　−ｔ’
＋　′今ア、−￥１　図FIG. 1 is a cross-sectional view of an apparatus for one embodiment of the invention. 1: M1 disk, 2: floating slider, 3: arm,
4: AE sensor, 5: movable stage, 6: AE sensor signal processing device! . 1.11,;,+' 1. '4,,L,,-t'
＋ ′Nowa、−￥1 Figure

Claims (1)

【特許請求の範囲】[Claims] １）磁気ディスクを低い回転数で回転させながら磁気ヘ
ッドの浮動スライダをディスクの半径全体にわたって移
動させて磁気ヘッドアームに取り付けられたアコーステ
ィック・エミッション・センサの出力を測定し、次いで
磁気ディスクを順次より高い回転数で回転させる同様の
測定を行う操作を繰り返すことを特徴とする磁気ディス
クのスライダ浮上特性測定方法。1) While rotating the magnetic disk at a low rotation speed, the floating slider of the magnetic head is moved over the entire radius of the disk to measure the output of the acoustic emission sensor attached to the magnetic head arm, and then the magnetic disk is rotated one after another. A method for measuring slider flying characteristics of a magnetic disk, which is characterized by repeating a similar measurement operation of rotating at a high rotational speed.
JP19911585A 1985-09-09 1985-09-09 Slider floating characteristic measuring method for magnetic disk Granted JPS6258471A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19911585A JPS6258471A (en) 1985-09-09 1985-09-09 Slider floating characteristic measuring method for magnetic disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19911585A JPS6258471A (en) 1985-09-09 1985-09-09 Slider floating characteristic measuring method for magnetic disk

Publications (2)

Publication Number Publication Date
JPS6258471A true JPS6258471A (en) 1987-03-14
JPH0363152B2 JPH0363152B2 (en) 1991-09-30

Family

ID=16402378

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19911585A Granted JPS6258471A (en) 1985-09-09 1985-09-09 Slider floating characteristic measuring method for magnetic disk

Country Status (1)

Country Link
JP (1) JPS6258471A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006259466A (en) * 2005-03-18 2006-09-28 Ricoh Co Ltd Cleaning device, process unit, and image forming apparatus
US7692888B2 (en) 2006-12-12 2010-04-06 Hitachi Global Storage Technologies Netherlands B.V. Apparatus, system, and method for detection of fly height margin using controlled excitation of air bearing mode
JP2011053408A (en) * 2009-09-01 2011-03-17 Ricoh Co Ltd Cleaning unit and image forming apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006259466A (en) * 2005-03-18 2006-09-28 Ricoh Co Ltd Cleaning device, process unit, and image forming apparatus
US7692888B2 (en) 2006-12-12 2010-04-06 Hitachi Global Storage Technologies Netherlands B.V. Apparatus, system, and method for detection of fly height margin using controlled excitation of air bearing mode
JP2011053408A (en) * 2009-09-01 2011-03-17 Ricoh Co Ltd Cleaning unit and image forming apparatus

Also Published As

Publication number Publication date
JPH0363152B2 (en) 1991-09-30

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