JPS6332774A - Disk device - Google Patents

Disk device

Info

Publication number
JPS6332774A
JPS6332774A JP17605786A JP17605786A JPS6332774A JP S6332774 A JPS6332774 A JP S6332774A JP 17605786 A JP17605786 A JP 17605786A JP 17605786 A JP17605786 A JP 17605786A JP S6332774 A JPS6332774 A JP S6332774A
Authority
JP
Japan
Prior art keywords
heads
servo
track
positioning signal
disks
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
JP17605786A
Other languages
Japanese (ja)
Inventor
Kuniaki Shirai
白井 国明
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to JP17605786A priority Critical patent/JPS6332774A/en
Publication of JPS6332774A publication Critical patent/JPS6332774A/en
Pending legal-status Critical Current

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

Abstract

PURPOSE:To simplify the constitution of the titled device by totalizing off-track information obtained from plural servo heads so as to position R/W heads to an optimum position under respective environments. CONSTITUTION:Disks 21-25 are supported to a spindle 1 of a disk device while they are centered. A servo pattern is recorded magnetically on the inner face of the disks 21-25. Further, head support arms 41-44 are provided to a carriage 3 and two magnetic heads each among heads 51-58 are supported to each arm (41-44). After the disks 21-25 reach the steady-state rotation, the carriage 3 uses the servo information obtained from the heads 51-58 to position the heads 51-58. The circuit generating the positioning signal consists of an operational amplifier 8 processing the steady-state positioning signal 6 and an adder 10 processing the output of off-track quantity detectors 91, 92, judges the off-track information from the heads 51-58 synthetically to position each of the R/W heads to the optimum position.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、情報処理分野における外部記憶装置の一つで
あるディスク装璧に関し、特にそのヘッドの位置決め方
式に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disk mounting, which is one of external storage devices in the information processing field, and particularly to a head positioning method thereof.

〔従来の技術〕[Conventional technology]

ディスク装置は、近年ますますその記憶容量の増大が期
待され、その実現のために情報の記録がディスクの円周
方向及び生鰻方向に高密度化さえてきており、特に後者
の場合には、トラック密度が究極近くまで高められた結
果、高度の位置決め精度が必要さなれ、かつ温度上昇に
よる熱膨張偏差でのトラックとヘッドの位置ずれ(オフ
・トラック)の問題が顕着化している。
In recent years, the storage capacity of disk devices has been expected to increase more and more, and in order to achieve this, information has been recorded at higher density in the circumferential direction and in the direction of the disk, especially in the latter case. As the track density has been increased to near the ultimate level, a high degree of positioning accuracy is required, and the problem of misalignment between the track and the head (off-track) due to thermal expansion deviation due to temperature rise has become a serious problem.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

従来は、この解決にあたシ温度補正回路を取り付ける等
の手段がとられたが、構成が複雑であり、温度上昇の度
合も使用環境によシ著しく異なシ、オフトラックの状態
も装置により特性が異なるため、必ずしも充分の補正が
なされていないのが現状であった。
Conventionally, measures such as installing a temperature compensation circuit have been taken to solve this problem, but the configuration is complicated, the degree of temperature rise varies significantly depending on the usage environment, and the off-track state also varies depending on the equipment. At present, sufficient correction has not always been made because the characteristics are different.

〔問題点を解決するための手段〕[Means for solving problems]

本発明のディスク装鐙は、ディスク上にデータ書き込み
及び読み出し用ヘッドを位置決めするためのサーボヘッ
ドを複数個有し、それらサーボヘッドから得られるオフ
トラック量を加算する加算器と、その加算結果をオフセ
ット値として定常の位置決め信号に加味し、オフトラッ
ク量を補正する位置決め信号を送出する演算増幅器とを
備えることを特徴とする。
The disk stirrup of the present invention includes a plurality of servo heads for positioning data writing and reading heads on the disk, an adder for adding up the amount of off-track obtained from the servo heads, and an adder for adding up the amount of off-track obtained from the servo heads, and an adder for adding up the amount of off-track obtained from the servo heads. The present invention is characterized by comprising an operational amplifier that sends out a positioning signal that is added to the steady positioning signal as an offset value and corrects the amount of off-track.

〔実施例〕〔Example〕

次に1本発明について図面を参照して説明する。 Next, one embodiment of the present invention will be explained with reference to the drawings.

第1図は、本発明忙よるディスク装置の側面図である。FIG. 1 is a side view of a disk device according to the present invention.

スピンドル1は、ディスク媒体21〜25を回転軸の中
心として支えている。この場合ディスク媒体21及び2
5は、サーボディスクであり、その面内忙は、サーボ・
パターンが磁気記録されている。
The spindle 1 supports disk media 21 to 25 as a center of rotation. In this case disk media 21 and 2
5 is a servo disk, and its in-plane busyness is determined by the servo disk.
The pattern is magnetically recorded.

残りの媒体21〜24は、データディスクである。キャ
リッジ3は、ヘッド支持アーム41〜44を有し、各ヘ
ッド支持アームは、それぞれ2個ずつの磁気ヘッド51
〜58を支えている。
The remaining media 21-24 are data disks. The carriage 3 has head support arms 41 to 44, and each head support arm supports two magnetic heads 51.
It supports ~58.

サーボ・ディスク21及び25に対向する磁気ヘッド5
1及び58は、サーボ・ヘッドであシ、他の52〜57
は、データの書き込み及び読み出し用のり−ド/ライト
(R/W)ヘッドである。
Magnetic head 5 facing servo disks 21 and 25
1 and 58 are servo heads, the other 52 to 57
is a read/write (R/W) head for writing and reading data.

スピンドル1は、ディスク媒体21〜25をそれ自身を
中心として回転させ、キャリッジ3は、磁気ヘッド51
〜58をディスク媒体21〜25の手縫方向に移動させ
る。
The spindle 1 rotates the disk media 21-25 about itself, and the carriage 3 rotates the magnetic head 51.
-58 are moved in the hand sewing direction of the disk media 21-25.

次に1上記構成を有するディスク装置の動作について説
明する。
Next, the operation of the disk device having the above configuration will be explained.

第1図において、ディスク媒体21〜25が定常回転速
度に達っした後、キャリッジ3は、サーボヘッド51及
び58より得られるサーボ・ディスク21及び22のサ
ーボ情報により、磁気ヘッド51〜58の位置決めを行
う。
In FIG. 1, after the disk media 21 to 25 reach a steady rotational speed, the carriage 3 uses the servo information of the servo disks 21 and 22 obtained from the servo heads 51 and 58 to position the magnetic heads 51 to 58. I do.

第2図は、上記磁気ヘッドの位置決めを行う際に必要な
情報を生成する回路のブロック図である。
FIG. 2 is a block diagram of a circuit that generates information necessary for positioning the magnetic head.

入力線10は、オフトラック量を含まない定常の位置決
め信号、出力線7は、オフトラック量を加味された位置
決め信号である。8はかかる位置決め信号を発生する演
算増幅器である。91及び92はそれぞれ第1図のサー
ボ・ヘッド51及び58から得られるサーボ信号から、
オフトラックの量に比例した電位差を発生する検出器で
あり、定常より中心側へずれている場合にはプラス、外
周側にずれている場合にはマイナスの電圧を発生する。
The input line 10 is a steady positioning signal that does not include the off-track amount, and the output line 7 is a positioning signal that takes the off-track amount into consideration. 8 is an operational amplifier that generates such a positioning signal. 91 and 92 are servo signals obtained from the servo heads 51 and 58 in FIG. 1, respectively;
This is a detector that generates a potential difference proportional to the amount of off-track, and generates a positive voltage when the deviation is toward the center from the steady state, and a negative voltage when the deviation is toward the outer circumference.

10は、前記位置ずれ電圧を加算する加算器である。10 is an adder that adds the positional deviation voltages.

磁気ヘッド51〜58の位置決めを行う際にけ、最初下
方のサーボヘッド58から得られるサーボ信号【よって
のに行い、所定のトラックに第1次の位置決めをする。
When positioning the magnetic heads 51 to 58, a servo signal obtained from the lower servo head 58 is first used to perform primary positioning on a predetermined track.

しかる後1(、もう一方のサーボ・ヘッド、51から得
られるサーボ信号をオフトラック量検出器91に入力し
、第1次位置決めにおいて、サーボ・ヘッド51のオフ
トラック量を得る。オフトラック量検出器92は、サー
ボ・ヘッド58により位置決めされているので、この時
はゼロである。したがって加算器10の出力は、サーボ
ヘッド51のオフトラック量に比例した値となり、それ
が演算増幅器8のオフセラ)11として、前記サーボヘ
ッド51のオフトラックを補正する方向に定常の位置決
め信号6に加味され、オフトラック羅を含んだ位置決め
信号7が出力され、キャリッジ3に作用することによっ
て、最終的には、サーボヘッド51及び58双方のオフ
トラック量が釣り合う点に位置決めがなされることにな
り、サーボ・ヘッド51及び58の間に6るR/wヘッ
ド52〜57は、最少の位置ずれ量で位置決めされる。
After that, the servo signal obtained from the other servo head 51 is input to the off-track amount detector 91, and the off-track amount of the servo head 51 is obtained in the first positioning.Off-track amount detection Since the adder 92 is positioned by the servo head 58, it is zero at this time. Therefore, the output of the adder 10 is a value proportional to the off-track amount of the servo head 51, which is the off-track amount of the operational amplifier 8. ) 11, the steady positioning signal 6 is added to the steady positioning signal 6 in the direction of correcting the off-track of the servo head 51, and the positioning signal 7 including the off-track is output, and by acting on the carriage 3, the final result is , positioning is performed at a point where the off-track amounts of both servo heads 51 and 58 are balanced, and the R/W heads 52 to 57 located between the servo heads 51 and 58 are positioned with the minimum amount of positional deviation. be done.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、本発明複数個のサーボ・ヘッドか
ら得たオフトラック情報を総合することにより、R/W
ヘッドをそれぞれの環境下で最適の位置への位置決め全
可能ならしめる効果を有する。
As explained above, by integrating off-track information obtained from a plurality of servo heads according to the present invention, R/W
This has the effect of making it possible to position the head at the optimum position under each environment.

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

第1図は本発明のディスク装置の一実施例の側面図、第
2図は該ディスク装置の位置決め信号生成回路のブロッ
ク図である。 1・・・・・・スピンドル、21〜25・・・・・・デ
ィスク、3・・・・・・キャリッジ、41〜44・・・
・・・ヘッド支持アーム、51〜58・・・・・・磁気
ヘッド、6・・−・・・定常の位置決め信号、7・・・
・・・オフトラック号の加味された位置決め信号、8・
・・・・・演算増幅器、91.92・・・・・・オフ・
トラック量検出器、10・・・・・・加算器。 こ−・′
FIG. 1 is a side view of an embodiment of a disk device of the present invention, and FIG. 2 is a block diagram of a positioning signal generation circuit of the disk device. 1... Spindle, 21-25... Disc, 3... Carriage, 41-44...
. . . Head support arm, 51-58 . . . Magnetic head, 6 . . . Steady positioning signal, 7 . . .
...Off-track positioning signal, 8.
...Operation amplifier, 91.92...Off.
Track amount detector, 10...Adder. Ko-・'

Claims (1)

【特許請求の範囲】[Claims] ディスク上にデータ書き込み及び読み出し用ヘッドを位
置決めするための複数のサーボヘッドと、前記サーボヘ
ッドから得られるオフ・トラック量を加算する加算器と
、その加算結果をオフセット値として位置決め信号に加
味えオフトラック量を補正する位置決め信号を送出する
演算増幅器とを有することを特徴とするディスク装置。
A plurality of servo heads for positioning the data writing and reading heads on the disk, an adder for adding the off-track amount obtained from the servo heads, and adding the addition result to the positioning signal as an offset value for off-tracking. 1. A disk device comprising: an operational amplifier that sends a positioning signal for correcting a track amount.
JP17605786A 1986-07-25 1986-07-25 Disk device Pending JPS6332774A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17605786A JPS6332774A (en) 1986-07-25 1986-07-25 Disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17605786A JPS6332774A (en) 1986-07-25 1986-07-25 Disk device

Publications (1)

Publication Number Publication Date
JPS6332774A true JPS6332774A (en) 1988-02-12

Family

ID=16006964

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17605786A Pending JPS6332774A (en) 1986-07-25 1986-07-25 Disk device

Country Status (1)

Country Link
JP (1) JPS6332774A (en)

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