JPS6018814A - Control method of magnetic disk head - Google Patents

Control method of magnetic disk head

Info

Publication number
JPS6018814A
JPS6018814A JP12742683A JP12742683A JPS6018814A JP S6018814 A JPS6018814 A JP S6018814A JP 12742683 A JP12742683 A JP 12742683A JP 12742683 A JP12742683 A JP 12742683A JP S6018814 A JPS6018814 A JP S6018814A
Authority
JP
Japan
Prior art keywords
head
track
alignment
magnetic
magnetic disk
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
JP12742683A
Other languages
Japanese (ja)
Inventor
Kiyoto Owatari
尾渡 清人
Koichiro Nakagawa
康一郎 中川
Yasutaka Nakajima
康孝 中島
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP12742683A priority Critical patent/JPS6018814A/en
Publication of JPS6018814A publication Critical patent/JPS6018814A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition 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
    • G11B5/54Disposition 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 into or out of its operative position or across tracks
    • G11B5/55Track change, selection or acquisition by displacement of the head
    • G11B5/5521Track change, selection or acquisition by displacement of the head across disk tracks
    • G11B5/5526Control therefor; circuits, track configurations or relative disposition of servo-information transducers and servo-information tracks for control thereof
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition 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
    • G11B5/488Disposition of heads
    • G11B5/4886Disposition of heads relative to rotating disc

Landscapes

  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)

Abstract

PURPOSE:To control the position of a magnetic head by performing the self-writing at a position excepting for an alignment track through the read/write head part of a magnetic disk device to be controlled and then measuring the distance between the data position and the alignment track. CONSTITUTION:An alignment disk containing an alignment track A written with high accuracy by an alignment writer is loaded to a prescribed track. Then a magnetic head is shifted by a track toward the inner circumferential side, for example, from the track A by a head feed mechanism of magnetic disk device to be controlled. The disk device peforms the self-writing by itself at the position of the head. Then a track B which has performed the self-writing is read as it is by the head. The head is shifted and fixed at the inner and outer circumferential sides in case the diference between the track pitch and the (b)-(d) shift distance is positive and negative respectively by an amount equivalent to said difference. This eliminates a control error due to an assembling common difference between an R/W gap 1 of the the magnetic head and the center between E gaps 2 and 3.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は磁気ディスク装置のトラック半径方向のずれ量
、即ちオフトラック量を調整するための磁気ディスクヘ
ッド調整方法に関するものである。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic disk head adjustment method for adjusting the amount of deviation in the track radial direction of a magnetic disk device, that is, the amount of off-track.

−1− 従来例の構成とその間融点 磁気ディスク用の磁気ヘッドには、一般にトンネルイレ
ーズヘッドとストラドルイレーズヘッドとがあり、両省
はイレーズヘッドの構造により区別されている。ストラ
ドルイレーズヘッドは、リード/ライトヘッド(以下、
R/Wヘッドと称す)とイレーズヘッド(以下、Eヘッ
ドと称す)とのヘッドギャップが一直線上にあり、電気
的タイミングがとりやすくて使い易いヘッドであるが、
磁気特性にや)難点がある。
-1- Conventional configuration and melting point thereof Magnetic heads for magnetic disks generally include tunnel erase heads and straddle erase heads, and the two types are distinguished by the structure of the erase head. The straddle erase head is a read/write head (hereinafter referred to as
The head gap between the R/W head (hereinafter referred to as the R/W head) and the erase head (hereinafter referred to as the E head) is in a straight line, making it easy to use the electrical timing, but
There is a problem with magnetic properties.

近年、磁気ディスク業界は大官石化の傾向にあり、大吉
−化達成にはTPI(1インチ当りのトラック数)を上
げる方法とBPI(円周方向1インチ当りのビット数)
を上げる方法の2つがある。
In recent years, the magnetic disk industry has tended to become a big industry, and in order to achieve this, there are two ways to increase TPI (tracks per inch) and BPI (bits per inch in the circumferential direction).
There are two ways to raise it.

後者によるとフォーマットを新規に作成しなければなら
ず、また従来品との互換性もなくなるため、TPIを上
げる方法を採用するメーカが多い。TPTを上げるため
には、一般に磁気特性面よりトンネルイレーズヘッドが
採用されている。
According to the latter, a new format must be created and there is no compatibility with conventional products, so many manufacturers adopt a method of increasing the TPI. In order to increase the TPT, a tunnel erase head is generally used from the viewpoint of magnetic properties.

このトンネルイレーズヘッドは、第1図、第2− 2 
− ・図に示すようにR/Wヘッドのギャップ1(以下、R
/Wギャップと称す)とEヘッドのギャップ2゜3(以
下、Eギャップと称す)とは、ある距11111だけ離
れている。またR/Wヘッドを構成するコア4a、4b
、4cとFヘッドを構成するコア5a。
This tunnel erase head is shown in Fig. 1 and Fig. 2-2.
- ・As shown in the figure, the R/W head gap 1 (hereinafter referred to as R
/W gap) and the E head gap 2°3 (hereinafter referred to as E gap) are separated by a certain distance 11111. In addition, cores 4a and 4b that constitute the R/W head
, 4c and a core 5a forming the F head.

5b、5cおよびスペーサ6a、6bは貼り合わされて
いる。なお、7はR/W’−1イル、8はE]イルであ
る。
5b, 5c and spacers 6a, 6b are bonded together. In addition, 7 is R/W'-1yl and 8 is E]yl.

従来、磁気ディスクドライブのヘッド調整は、通常、第
3図のような記録データパターンのアライメントディス
クが用いられる。このCFディスクは、通常使用状態に
おける中心点Pから多少ずれた中心点P′によって2本
の同心円状の連続したデータ01,02が記録されてい
る。前記P点を中心とする]・ラック03を軌跡として
磁気ヘッドがa−b −c−dと移動した場合のリード
波形は第4図のa−dの様になり、ディスク1回転で1
度2つの猫の目に似た波形が得られる。この2つの波形
の振幅比A/Bが前記中心点Pによるトラック03のオ
フトラック編に相当し、これをもってヘラ−3− ド位置を調整する方法が広く一般に行われている。
Conventionally, for head adjustment of a magnetic disk drive, an alignment disk having a recorded data pattern as shown in FIG. 3 is usually used. On this CF disk, two concentric continuous data 01 and 02 are recorded at a center point P' that is slightly shifted from the center point P in normal use. The read waveform when the magnetic head moves a-b-c-d using the rack 03 as a trajectory is as shown in a-d in Fig. 4, and one revolution of the disk results in one rotation.
A waveform resembling two cat's eyes is obtained. The amplitude ratio A/B of these two waveforms corresponds to the off-track version of track 03 based on the center point P, and a method of adjusting the herald position using this is widely used.

黙しながら、トンネルイレーズヘッドは第5図に示す如
く、先づR/Wギャップ1で書込まれたデータはEギャ
ップ2,3によってその両端を消去されてデータ幅は細
くなる。この細くなったデータの中心が、このドライブ
のトラック中心であり、このトラック中心はR/Wギャ
ップ1によって決まるものではなく、Eギャップ2.3
によって決定される。なお、9は磁気ディスク回転中心
である。従って、前述の従来の調整方法によれば、R/
Wギャップ1の中心をデータの中心に合わせている事と
なり、最外周トラックと最内周トラックまでの曲率差に
よる中心ずれ、及び第6図の如くヘッド製作時にはR/
Wギャップ1の中心とEギャップ2.3間距離の中心を
A±αに管理しているが、この寸法公差αが直接誤差と
なる欠点があり、特にTPIの高いドライブにおいては
、この調整誤差は致命的な欠陥となる。
In the tunnel erase head, as shown in FIG. 5, the data first written in the R/W gap 1 is erased at both ends by the E gaps 2 and 3, and the data width becomes narrower. The center of this narrowed data is the track center of this drive, and this track center is not determined by the R/W gap 1, but by the E gap 2.3.
determined by Note that 9 is the center of rotation of the magnetic disk. Therefore, according to the conventional adjustment method described above, R/
The center of W gap 1 is aligned with the center of the data, and the center deviation due to the difference in curvature between the outermost track and the innermost track, and the R/R when manufacturing the head as shown in Figure 6.
The center of the distance between the W gap 1 and the E gap 2.3 is controlled to be A±α, but there is a drawback that this dimensional tolerance α becomes a direct error.Especially in drives with high TPI, this adjustment error is a fatal flaw.

発明の目的 本発明は同心円状に書かれたアライメントディー 4 
− スフを用いて磁気ヘッド位置を高精度に調整可能になら
しめる磁気ヘッド調整方法を提供することを目的とする
Purpose of the Invention The present invention provides an alignment dee written in concentric circles.
- It is an object of the present invention to provide a magnetic head adjustment method that allows the position of the magnetic head to be adjusted with high precision using a spoon.

発明の構成 本発明の磁気ディスクヘッド調整方法は、1つの読み出
し・書込みヘッド部と2つの消去ヘッド部を備えたトン
ネルイレーズ型磁気ヘッドの被調整ディスク装置におけ
る位置調整に際し、同心円状に書かれたアライメントト
ラックを有するアライメントディスクの前記アライメン
トトラックでない位置に被調整磁気ディスク装置の前記
読み出し・書込みヘッド部で自己書込みし、この自己書
込みしたデータ位置とを前記アライメントトラックとの
間隔を測長して磁気ヘッド位置を調整することを目的と
する。
Structure of the Invention The method for adjusting a magnetic disk head of the present invention is to adjust the position of a tunnel erase type magnetic head having one read/write head section and two erase head sections in a disk device to be adjusted. The reading/writing head section of the magnetic disk device to be adjusted self-writes data to a position other than the alignment track of an alignment disk having an alignment track, and magnetically connects this self-written data position to a position other than the alignment track by measuring the distance between the self-written data position and the alignment track. The purpose is to adjust the head position.

実施例の説明 以下、本発明の一実施例について図面を参照しながら説
明する。第7図は本発明の一実施例における被調整磁気
ディスク装置による自己書込みを示すものである。先ず
、所定のトラックにアライー 5 − メントライターによって高精度に書込まれたアライメン
トトラック八を有するアライメントディスクを、被調整
磁気ディスク装置に装填し、被調整磁気ディスク装置自
身が有するヘッド送り機構(ステッピングモータに連結
されたスチールベルト方式、スパイラルカム方式、リー
ドスクリュ一方式などであるが、ここでは−示せず)に
よって、前記アライメントトラックAより例えば内周側
に1トラツクだけヘッドを移動させ被調整磁気ディスク
装置自身でその位置に自己書込みを行なう。
DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 7 shows self-writing by the adjusted magnetic disk device in one embodiment of the present invention. First, an alignment disk having alignment tracks written in predetermined tracks with high precision by an alignment writer is loaded into the magnetic disk device to be adjusted, and the head feeding mechanism (stepping mechanism) of the magnetic disk device itself is loaded. The head is moved, for example, one track inward from the alignment track A using a steel belt system connected to a motor, a spiral cam system, a single lead screw system, etc. (not shown here), and the magnetic field to be adjusted is adjusted. The disk device itself writes to that location.

この自己書込みトラックがBである。なお、1はR/W
ギャップ、2は2つのEヘッドのうちの外周側Eギャッ
プ、3は内周側Eギャップ、9は磁気ディスク回転中心
である。次に、自己書込みを行なったトラックBをその
ま)のヘッド位置で読み取る。すなわち、第8図でR/
Wヘッド1がトラックBに対してアの様な位置間係にあ
る状態である。R/Wギャップ1をアからイ状態まで僅
かづつ移動させてもR/Wヘッドの検出するデータ幅は
同じなのでヘッド出力は不変である(ヘッド−6− 出力はデータ幅に比例するため)。さらにイ状態からつ
まで移動させるとR/Wギャップ1の検出できるデータ
幅は徐々に減少していき、その出力電圧も比例して減少
してい(。そしてつから■状態まで移動させると、アラ
イメントトラックAを読みはじめ徐々に出力電圧は増加
する。以上の過程の出力電圧の変化を示したものが第9
図である。
This self-writing track is B. In addition, 1 is R/W
The gap 2 is the outer E gap of the two E heads, 3 is the inner E gap, and 9 is the center of rotation of the magnetic disk. Next, track B on which self-writing has been performed is read at the same head position. That is, in Fig. 8, R/
The W head 1 is in a positional relationship with the track B as shown in A. Even if the R/W gap 1 is moved slightly from state A to state A, the data width detected by the R/W head remains the same, so the head output remains unchanged (because the head output is proportional to the data width). Furthermore, when moving from state A to The output voltage gradually increases after reading track A.The change in output voltage during the above process is shown in the 9th section.
It is a diagram.

ここでトラックピッチは設計的に既知であり、前記イ〜
工までの移動量と同一になれば良いちのであり、(トラ
ックピッチ)−(付間移動量)が正であればその差分だ
けヘッドを内周側に、逆に負であればその差だけ外周側
に移動させて固定すれば、被調整磁気ディスク装置は磁
気ヘッドのR/W−fセップ1とEギャップ2.3の中
心組立公差による調整狂いもなく、高精磨にトラック位
置に調整できる。
Here, the track pitch is known by design, and
If (track pitch) - (travel distance between tracks) is positive, move the head toward the inner circumference by that difference, and if it is negative, move the head by that difference. By moving it to the outer circumferential side and fixing it, the magnetic disk device to be adjusted can be adjusted to the track position with high precision without any adjustment errors due to the center assembly tolerance of the magnetic head's R/W-f sep 1 and E gap 2.3. can.

発明の詳細 な説明のように本発明の磁気ディスクヘッド調整方法は
、従来例の如くアライメントディスクを偏芯させて書く
必要がないためアライメントデー 7 − ィスクの作成が容易なばかりでなく、実際にその磁気デ
ィスク装置自身の記録位置とアライメントディスクのト
ラック位置を比較して調整するので、最外周トラックか
ら最内周トラックまで曲率差を吸収でき、又R/Wヘッ
ドとEヘッドとの組立のバラツキをも吸収できるため、
高精度のヘッド位置調整が可能となり、特に高トラツク
密度装置に要求される高精度位置調整が可能なものであ
る。
As described in the detailed description of the invention, the magnetic disk head adjustment method of the present invention does not require writing with the alignment disk eccentric as in the conventional example, so it is not only easy to create an alignment disk, but also easy to use in practice. Since the recording position of the magnetic disk device itself and the track position of the alignment disk are compared and adjusted, differences in curvature from the outermost track to the innermost track can be absorbed, and variations in the assembly of the R/W head and E head can be absorbed. Because it can also absorb
This makes it possible to adjust the head position with high precision, especially the high precision position adjustment required for high track density devices.

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

第1図と第2図は従来のトンネルイレーズヘッドの要部
斜視図と要部平面図、第3図は従来のヘッド調整方法の
説明図、第4図は第3図におけるR/Wヘッドの出力波
形図、第5図はトンネルイレーズヘッドでのデータ幅の
形成される様子を示す説明図、第6図はR/Wヘッドと
Fヘッド中心寸法を示すヘッド要部平面図、第7図は本
発明一実施例におけるアライメントトラックと自己書込
みトラックとの説明図、第8図は磁気ヘッドを自己書込
み位置から外周側へ移動させていったときのR/Wギャ
ップ1と自己書込みトラックBとア一 8 − ライメント1−ラックAどの相対情誼関係を示寸説明図
、第9図は第8図におけるヘッド出力説明図である。 1・・・R/Wギャップ、2.3・・・Eギャップ、9
・・・磁気ディスク回転中心、A・・・アライメントト
ラック、B・・・自己内込みトラック 代理人 森 本 義 弘 9− fI/!1lrI!J 第2figJ 第3図 第4図 55図 O′X? 第4図 第7図
Figures 1 and 2 are a perspective view and a plan view of the main parts of a conventional tunnel erase head, Figure 3 is an explanatory diagram of the conventional head adjustment method, and Figure 4 is an illustration of the R/W head in Figure 3. Output waveform diagram, Figure 5 is an explanatory diagram showing how the data width is formed in the tunnel erase head, Figure 6 is a plan view of the main part of the head showing the center dimensions of the R/W head and F head, and Figure 7 is an explanatory diagram showing how the data width is formed in the tunnel erase head. FIG. 8 is an explanatory diagram of an alignment track and a self-writing track in an embodiment of the present invention. FIG. 18 - A dimensional explanatory diagram showing the relative relationship between alignment 1 and rack A. FIG. 9 is an explanatory diagram of the head output in FIG. 8. 1...R/W gap, 2.3...E gap, 9
... Magnetic disk rotation center, A... Alignment track, B... Self-inclusion track agent Yoshihiro Morimoto 9- fI/! 1lrI! J 2nd figJ 3rd 4th 55th figure O'X? Figure 4 Figure 7

Claims (1)

【特許請求の範囲】[Claims] 1.1つの読み出し・書込みヘッド部と2つの消去ヘッ
ド部とを備えたトンネルイレーズ型磁気ヘッドの被調整
磁気ディスク装置における位置調整に際し、同心状に書
かれたアライメントトラックを有するアライメントディ
スクの前記アライメントトラックでない位置に被調整磁
気ディスク装置の前記読み出し・書込みヘッド部で自己
書込みし、この自己書込みしたデータ位置と前記アライ
ンメントトラックとの間隔を測長して磁気ヘッド位置を
調整する磁気ディスクヘッド調整方法。
1. When adjusting the position of a tunnel erase type magnetic head having one read/write head section and two erase head sections in a magnetic disk device to be adjusted, the alignment of an alignment disk having alignment tracks written concentrically. A magnetic disk head adjustment method in which the read/write head unit of the magnetic disk device to be adjusted self-writes data to a non-track position, and the distance between the self-written data position and the alignment track is measured to adjust the magnetic head position. .
JP12742683A 1983-07-12 1983-07-12 Control method of magnetic disk head Pending JPS6018814A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12742683A JPS6018814A (en) 1983-07-12 1983-07-12 Control method of magnetic disk head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12742683A JPS6018814A (en) 1983-07-12 1983-07-12 Control method of magnetic disk head

Publications (1)

Publication Number Publication Date
JPS6018814A true JPS6018814A (en) 1985-01-30

Family

ID=14959662

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12742683A Pending JPS6018814A (en) 1983-07-12 1983-07-12 Control method of magnetic disk head

Country Status (1)

Country Link
JP (1) JPS6018814A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4748524A (en) * 1985-12-24 1988-05-31 Oki Electric Industry Co., Ltd. Alignment disk for use in adjusting or inspecting a magnetic head in a floppy disk drive unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4748524A (en) * 1985-12-24 1988-05-31 Oki Electric Industry Co., Ltd. Alignment disk for use in adjusting or inspecting a magnetic head in a floppy disk drive unit

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