JPS59213069A - Magnetic head positioning device - Google Patents

Magnetic head positioning device

Info

Publication number
JPS59213069A
JPS59213069A JP8574883A JP8574883A JPS59213069A JP S59213069 A JPS59213069 A JP S59213069A JP 8574883 A JP8574883 A JP 8574883A JP 8574883 A JP8574883 A JP 8574883A JP S59213069 A JPS59213069 A JP S59213069A
Authority
JP
Japan
Prior art keywords
head
data
servo
zone
output
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.)
Pending
Application number
JP8574883A
Other languages
Japanese (ja)
Inventor
Yosuke Seo
瀬尾　洋右
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP8574883A priority Critical patent/JPS59213069A/en
Publication of JPS59213069A publication Critical patent/JPS59213069A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks

Landscapes

  • Moving Of The Head To Find And Align With The Track (AREA)

Abstract

PURPOSE:To position a data head with a high accuracy by placing the data head and a servo-head so that the servo-head exists in a specified area against other data zone, when the data head coincides with a data. CONSTITUTION:A data head 12 and a servo-head 13 are loaded on a slider 11, and a data recording zone 14 and an erasing zone 15 are shown on the disk surface. Also, when the data head coincides with on the data recording zone, the servo-head is placed so as to be laid across the erasing zone and the data zone. Therefore, at the time of a track following operation, an output of the servo-head is servo-operated so as to hold a constant voltage. In this case, when correcting an output variation of a film thickness variation, a radial position, etc., an output of an automatic gain adjusting circuit of a signal of the data head 12 can be utilized since the servo-head 13 exists in the vicinity of the data head 12. In this way, a servo-signal having a linear relation against a position shift is obtained without requiring a special servo-pattern, therefore, the head is positioned with a high accuracy.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は、移動可能な磁気ヘッドを有する磁気ディスク
装置の磁気ヘッド位置決め装置に係り、特に１つのスラ
イダーに二つ以上の電磁変換器すなわちヘッドを有する
場合に好適なヘッド位置決め装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a magnetic head positioning device for a magnetic disk drive having a movable magnetic head, and in particular to a magnetic head positioning device for a magnetic disk drive having a movable magnetic head, and particularly to a magnetic head positioning device for a magnetic disk drive having a movable magnetic head. The present invention relates to a head positioning device suitable for use when the present invention has a head positioning device.

〔発明の背景〕[Background of the invention]

従来のディスク装置では、第１図に示す様に、サーボ専
用のヘッド５ヤ−１多数のデータヘッド４を同時に位置
付けているため、温度変化等に伴うデータヘッドの位置
ずれが生じていた。この位置ずれを補正するために、特
公昭５５−２０３０２号公報に提示されている方法があ
るが、データ面に多くのセクターを要し、データの利用
面積が減少すること、データ面からの間欠的なサーボ信
号とサーボ面からの連続的なサーボ信号を合成するため
、振動による位置ずれが増大する欠点があった。In a conventional disk device, as shown in FIG. 1, a large number of data heads 4 per servo-dedicated head 5 are simultaneously positioned, resulting in displacement of the data heads due to temperature changes and the like. In order to correct this positional shift, there is a method proposed in Japanese Patent Publication No. 55-20302, but this method requires many sectors on the data surface, reduces the area used for data, and has the disadvantage that Since the conventional servo signal and the continuous servo signal from the servo surface are combined, there is a drawback that positional deviation due to vibration increases.

また、特公昭５７−３２４０４号公報には、データその
ものを利用する方法が提示されているが、特許に示され
ているＭＲヘッドでは書き込みが出来ないため、書き込
み専用のヘッドを別に用意する必要があり、実装上の問
題も提示されていない。Furthermore, Japanese Patent Publication No. 57-32404 proposes a method that uses the data itself, but since the MR head shown in the patent cannot write, it is necessary to prepare a separate head for writing only. Yes, and no implementation issues have been presented.

〔発明の目的〕[Purpose of the invention]

本発明の目的は、データヘッドの高精度位置決め装置を
提供することにある。An object of the present invention is to provide a highly accurate positioning device for a data head.

〔発明の概要〕[Summary of the invention]

位置決め装置の最も好ましい態様は、データ領域が、そ
のままサーボ用にも使えることである。The most preferable aspect of the positioning device is that the data area can be used as is for servo purposes.

データ信号をサーボ信号として用いる場合には、位置ず
れと出力変化が、線型関係にあることが必要であるが、
通常、同一ヘッドで書き込み、読み出し出力と位置ずれ
の関係を調べると第４図の様に位置ずれ叶Ｘが小さい範
囲Ａでは出力減少量は、位置ずれ量と線型関係にならな
い。位置ずれ量Ｘが大きくなり、Ｂの領域では出力と位
置ずれ量との間に線型関係が成立する。本発明はとのＢ
領域を用いて、データ信号をサーボ信号として用いるこ
とを特徴とする。When using a data signal as a servo signal, it is necessary that there is a linear relationship between positional deviation and output change.
Normally, when examining the relationship between write and read output and positional deviation using the same head, as shown in FIG. 4, in range A where positional deviation X is small, the amount of output reduction does not have a linear relationship with the amount of positional deviation. The amount of positional deviation X increases, and in region B, a linear relationship is established between the output and the amount of positional deviation. The present invention is with B.
It is characterized in that a data signal is used as a servo signal using a region.

即ち、データヘッドの近傍にサーボヘッドを設け、デー
タヘッドがデータと一致した時に、サーボヘッドが、他
のデータゾーンに対して、Ｂの領域にある様に、データ
ヘッド、サーボヘッドを配置することを特徴としている
。That is, a servo head is provided near the data head, and the data head and servo head are arranged so that when the data head matches the data, the servo head is in area B with respect to other data zones. It is characterized by

〔発明の実施例〕 以下、本発明の一実施例全第２図、第３図によシ説明す
る。本実施例では第２図に示すように、スライダー１１
にデータヘッド１２、サーボヘッド１３が搭載されてお
り、ディスク面上には、データ記録ゾーン１４、消去ゾ
ーン１５が示されている。またスライダー１１には書込
み後両側をイレーズするだめのイレーズヘッドが、例え
ば積層される形で搭載されている。データヘッドがデー
タ記録ゾーン上に一致したとき、サーボヘッドは第２図
に見られる様に、消去ゾーンとデータゾーンに股がる様
に配置されている。こ′の関係を第５図を用いて詳しく
説明する。データへンドコア巾Ｔｏ、イレーズ領域Ｔｇ
）サーボへラドコア巾Ｔｓとする。データヘッドがデー
タ記録領域Ｔ。[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be explained with reference to FIGS. 2 and 3. In this embodiment, as shown in FIG.
A data head 12 and a servo head 13 are mounted on the disk, and a data recording zone 14 and an erasing zone 15 are shown on the disk surface. Further, erase heads for erasing both sides after writing are mounted on the slider 11, for example, in a stacked manner. When the data head is aligned over the data recording zone, the servo head is positioned so as to straddle the erase zone and the data zone, as seen in FIG. This relationship will be explained in detail using FIG. Data hand core width To, erase area Tg
) The rad core width to the servo is Ts. The data head is the data recording area T.

に完全に一致した時、サーボヘッドの中心位置が、Ｄの
領域のとき位置すれと出力が線型関係を持つこのＤの範
囲はＳｌを中心にする場合と８２を中心とする場合があ
る。Ｄの領域は と表わせる。従ってデータヘッドとサーボヘッド間の距
離ｔは 又は となる。ｎけｎ≧１の整数を示す。When the center position of the servo head is in the region D, there is a linear relationship between the positional deviation and the output when the servo head completely coincides with the servo head. The area of D can be expressed as. Therefore, the distance t between the data head and the servo head is or. n represents an integer of n≧1.

望ましくは、 ／Ｌ＝ｎ　（ＴＤ　＋Ｔｉ　） ｒ ｔ＝ｎ　（Ｔｎ　＋Ｔｉ　）　＋Ｔｉ＋である。Preferably, /L=n (TD + Ti) r t=n (Tn+Ti)+Ti+.

従って正確な測定領域はＤである。トラツク７オロイン
グ動作時にはサーボヘッド出力が一定電圧を保つ様にサ
ーボされる。この際、膜厚変化、半径位置等の出力変動
に対する補正は、データヘッドの近傍にサーボヘッドが
あることからデータヘッドの信号の自動利得調整回路の
出力が利用できる。あるいは、第６図２１の様に半径方
向に連続した、比較パターンを円周に多数設けるなどし
て補正するデータば２２に記録する。また、サーボヘッ
ド１３の近傍に第２図に示す様に別のサーボヘッド１３
′を設け、二つのサーボヘッド出力の差を用いて、サー
ボすることにより、膜厚差や、半径位置での出力差を補
正することも可能である。Therefore, the accurate measurement area is D. During the track 7 rolling operation, the servo head output is servoed to maintain a constant voltage. At this time, since the servo head is located near the data head, the output of the automatic gain adjustment circuit of the signal of the data head can be used to correct output fluctuations such as changes in film thickness and radial position. Alternatively, as shown in FIG. 6, a large number of comparison patterns that are continuous in the radial direction are provided around the circumference, and are recorded in the correction data field 22. Further, as shown in FIG. 2, another servo head 13 is provided near the servo head 13.
It is also possible to correct film thickness differences and output differences at radial positions by providing servo using the difference in the outputs of the two servo heads.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、データヘッド近傍にサーボヘッドを配
置することが出来、しかも、特別なサーボパターンを必
要とせず、位置ずれに対して、線型関係を持つサーボ信
号が得られるので、高精度ヘッド位置付けが可能になる
。また、ヘッドは、同一スライダー上の平面上に取り付
けられ、データヘッドとサーボヘッドの間隔はトラック
ピッチに関する制限はあるが、製作上容易な様に広げる
ことも可能なため、薄膜形成技術が容易に利用できる効
果がちム製作の点で極めて有利である。According to the present invention, the servo head can be placed near the data head, and a servo signal having a linear relationship with positional deviation can be obtained without requiring a special servo pattern. positioning becomes possible. In addition, the heads are mounted on a flat surface on the same slider, and although the distance between the data head and the servo head is limited by the track pitch, it can be widened for easy manufacturing, making thin film formation technology easy. The available effects are extremely advantageous in terms of gimbal fabrication.

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

第１図は、従来のディスク装置の説明図、第２図は、本
発明の実施例を示す図、第３図は第２図の一部分の拡大
図、第４図はその動作の説明図、第５図はデータヘッド
とサーボヘッドの配置を説明する図、第６図は、ディス
ク面内に書き込まれた比較パターンの配置を説明する図
である。 １・・・ディスク、２・・・キャリッジ、４・・・デー
タヘッド、５・・・サーボヘッド、１１・・・スライダ
ー、１２・・データヘッド、１３．１３”・・・サーボ
ヘッド、χ　１　図 第２　図 第　４　図 箇３図 第　６　（２） １FIG. 1 is an explanatory diagram of a conventional disk device, FIG. 2 is a diagram showing an embodiment of the present invention, FIG. 3 is an enlarged view of a portion of FIG. 2, and FIG. 4 is an explanatory diagram of its operation. FIG. 5 is a diagram for explaining the arrangement of the data head and the servo head, and FIG. 6 is a diagram for explaining the arrangement of comparison patterns written within the disk surface. 1... Disk, 2... Carriage, 4... Data head, 5... Servo head, 11... Slider, 12... Data head, 13.13"... Servo head, χ 1 Figure 2 Figure 4 Figure 3 Figure 6 (2) 1

Claims (1)

【特許請求の範囲】[Claims] １、　回転する磁気ディスク上の指定位置に磁気ヘッド
を位置付ける磁気ヘッド位置決め装置において、スライ
ダーに、データ用ヘッドとサーボ用ヘッドを設はデータ
ヘッドが正しく位置付けされる時、サーボヘッドがデー
タゾーンを股がる様に配置し、上記サーボ用ヘッドが、
データ信号からサーボ信号を得ることを特徴とする磁気
ヘッド位置決め装置。1. In a magnetic head positioning device that positions a magnetic head at a specified position on a rotating magnetic disk, a data head and a servo head are installed on a slider so that when the data head is correctly positioned, the servo head crosses the data zone. The above servo head is
A magnetic head positioning device characterized by obtaining a servo signal from a data signal.
JP8574883A 1983-05-18 1983-05-18 Magnetic head positioning device Pending JPS59213069A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8574883A JPS59213069A (en) 1983-05-18 1983-05-18 Magnetic head positioning device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8574883A JPS59213069A (en) 1983-05-18 1983-05-18 Magnetic head positioning device

Publications (1)

Publication Number Publication Date
JPS59213069A true JPS59213069A (en) 1984-12-01

Family

ID=13867468

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8574883A Pending JPS59213069A (en) 1983-05-18 1983-05-18 Magnetic head positioning device

Country Status (1)

Country Link
JP (1) JPS59213069A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017021876A (en) * 2015-07-10 2017-01-26 株式会社東芝 Disk device, controller and control method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017021876A (en) * 2015-07-10 2017-01-26 株式会社東芝 Disk device, controller and control method

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