JPS6087420A - Azimuth measurement medium of magnetic head - Google Patents

Azimuth measurement medium of magnetic head

Info

Publication number
JPS6087420A
JPS6087420A JP19673983A JP19673983A JPS6087420A JP S6087420 A JPS6087420 A JP S6087420A JP 19673983 A JP19673983 A JP 19673983A JP 19673983 A JP19673983 A JP 19673983A JP S6087420 A JPS6087420 A JP S6087420A
Authority
JP
Japan
Prior art keywords
azimuth
track
magnetic head
medium
measurement
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
JP19673983A
Other languages
Japanese (ja)
Inventor
Takeshi Fujita
剛 藤田
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP19673983A priority Critical patent/JPS6087420A/en
Publication of JPS6087420A publication Critical patent/JPS6087420A/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
    • G11B5/56Disposition 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 support for the purpose of adjusting the position of the head relative to the record carrier, e.g. manual adjustment for azimuth correction or track centering

Landscapes

  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

PURPOSE:To attain measurement even for an azimuth produced by a parallel shift of a magnetic head and to ensure the accurate measurement of azimuths, by recording the azimuth measurement information of the magnetic head at least on a track at the inner circumferential side and a track at the outer circumferential side among plural tracks. CONSTITUTION:The azimuth information is recorded on a track 8 near the most outer circumference and a track 68 near the most inner circumference of an azimuth measurement medium. This medium is loaded to a floppy disk device for which an azimuth should be measured, and a magnetic head is shifted to the track 8 to measure an azimuth theta1 there. Then the magnetic head is shifted to the track 68 to measure an azimuth theta2 there. Then theta1not equal to theta2 is satisfied a position shift (x) due to a parallel shift of the magnetic head is not 0. In addition, the azimuth measurement information is recorded when necessary on an intermediate track between tracks of the inner and outer circumferential sides. Thus the accuracy is improved for measurement of azimuths.

Description

【発明の詳細な説明】 (a)発明の技術分野 本発明は、フロッピーディスク装置等の磁気へラドアジ
マス測定用媒体に係り、特にt〃気−、ノド平jテ移動
によるアジ−7スをも測定できるβり気−・ノトノアジ
マス測定媒体に関するものである。
Detailed Description of the Invention (a) Technical Field of the Invention The present invention relates to a medium for measuring magnetic field azimuth such as a floppy disk device, and particularly to a medium for measuring magnetic field azimuth such as a floppy disk device. This invention relates to a medium for measuring β-resistance and notonoazimuth.

fb)技術のV!景 媒体への記録磁化が正弦波状(波長λ)でトランクの長
さ方向に向いている理想的な場合において、第1図に示
す如く再生用磁気5ノド1の空隙2 (以下ギャップと
称する)が平行であり、ギヤノブの方向がトラックの幅
方向に対して90−0度だり領糾している場合には、)
■3生用研気・へ・ノl−からの出力は次のような出力
[0失f(θ)を生ずる。
fb) Technology V! In an ideal case where the recording magnetization on the image medium is sinusoidal (wavelength λ) and oriented in the length direction of the trunk, as shown in Fig. is parallel, and the direction of the gear knob is 90-0 degrees or opposite to the width direction of the truck)
■The output from the 3rd student's research station produces the following output [0 loss f(θ).

(8=oatミカ” 7jT’S yヒ’c L+”’
io)ここで、ν■は磁気′・ノドのコア幅、λは磁気
記録の記録波長である。
(8=oat Mika"7jT'Syhi'cL+"'
io) Here, ν■ is the core width of the magnetic node, and λ is the recording wavelength of magnetic recording.

磁気記録装置においては、媒体に記録されている磁化方
向と磁気ヘッドのギャップの作る角度は直角であるのが
理想的である。しかし、特に媒体互換正の要求されるフ
ロッピーディスク装置やディスクパンク装置等では、各
装置におりる磁気−・ノド取イリ&Jの組立誤差により
、実際には直角に対する角度誤差(アジマス)が生ずる
。従って装置の出荷時にこのアジマスが規定範囲内にあ
るかど・)か検査しなければならない。このアジマスは
アジマス測定用の媒体に記録されたアジマス測定情報を
検査対象の装置によって再生し、その出力波形の振幅を
により知ることができる。
In a magnetic recording device, ideally the direction of magnetization recorded on the medium and the angle formed by the gap between the magnetic head are at right angles. However, especially in floppy disk devices, disk puncture devices, etc. that require high media compatibility, an angular error (azimuth) with respect to the right angle actually occurs due to assembly errors of the magnetic, throat, and J in each device. Therefore, when the device is shipped, it must be inspected to see if this azimuth is within the specified range. This azimuth can be determined by reproducing the azimuth measurement information recorded on the azimuth measurement medium by the device to be inspected, and thereby knowing the amplitude of the output waveform.

ここでアジマス情報記録方法を第2図を参照しながら説
明する。アジマス情報は複数のバースト信号によって構
成されている。このバースト信号の再生出力は正弦波状
の波形・を持つ。そしてあらかじめ、−ら、1−θ/、
−”/、’θ2(1θj −、/、1よ )のアジマス
を持つ4つの磁気−\ソト°によつ°ζ同一波長λにて
4つのバースト信号をΔ、B、C,Dを記録しておく。
Here, the azimuth information recording method will be explained with reference to FIG. Azimuth information is composed of a plurality of burst signals. The reproduced output of this burst signal has a sinusoidal waveform. And in advance, -ra, 1-θ/,
Record four burst signals Δ, B, C, and D at the same wavelength λ by four magnetic −\sotho° with azimuth of −”/, 'θ2 (1θj −, /, 1) I'll keep it.

第2図はこれら4つのバースト信号の出力波形の包絡線
(出力振幅を表す)を表すものである。これらバースト
信号が記録された媒体をアンマスを測定すべき装置に挿
入し、再生出力波形をオシ1−1スコープ等で観測する
。このとき再生出力はアジマス情報記録時に媒体磁化方
向にあらかしめつuJられたアジマス1011士5と、
との装置の磁気−・ノドが個別に持つアジマス0との差
に対応し・た)′ジマス損失f(θ)(バーストと称す
る)を生ずる。従って仮にバースト八とハースIBが等
しいとすると。
FIG. 2 shows the envelopes (representing output amplitudes) of the output waveforms of these four burst signals. The medium on which these burst signals are recorded is inserted into a device for measuring unmass, and the reproduced output waveform is observed with an oscillator 1-1 scope or the like. At this time, the reproduction output is azimuth 1011 and 5, which is roughly set in the medium magnetization direction when azimuth information is recorded.
This produces an azimuth loss f(θ) (referred to as a burst) corresponding to the difference in azimuth from 0 that the magnetic node of the device has individually. Therefore, suppose Burst 8 and Hearth IB are equal.

となる。よって 髄+Q”Q+−0 であるので θ=(0,−9,)/ユ となって、この装置が個別に持つアジマス力くまる。仮
にバースI−Cとノく−ストB力く等しし)ときには 0=(臥−01)/l となる。またバースト八くノ\−スト13のH9&こし
まθ> (O,−9□)/2− バーストC〉バーストDの時に番よ 転> (8z−e+) / 2 となる。従って)′シ′7ス規格値をへと°3−ると。
becomes. Therefore, since marrow + Q"Q + -0, θ = (0, -9,) / U, which sums up the azimuth force that this device has individually. Suppose that Birth I-C and Noku-st B force, etc. (O, -9□)/2- Burst C> Burst D Rotation > (8z-e+) / 2.Therefore, if we change the standard value of )'7 to °3-.

&s=(’9−−e+)/ ’1 であるようにしておLJばノ\−ストΔ〜Dの大l」・
(又は同等)の判別だLJで、アジマスが規1各をハ)
た磁気ヘッドで記録したものであれば、 a+++定ず
べき装置のアジマスがθ−111”の時 −針−82−3ヤ 0、−〇二 3曜 となる。従ってバーストAとハーストBが一致したとき
、装置のアジマスはθ−−15゛ であることがわかる
&s=('9--e+)/'1.
(or equivalent) in LJ, azimuth is 1 each (c)
If it was recorded with a magnetic head, a +++ should be set, when the azimuth of the device is θ - 111" - the hands - 82 - 3 y 0, - 02 3 yo. Therefore, burst A and burst B match. Then, it can be seen that the azimuth of the device is θ--15゛.

第1式かられかるようにアジマス損失を決定するπWθ
/λと以上のようなアジマス損失(dB)との関係を第
3図に示す。この図からもわかるように、πWθ/λの
値が大きいところではアジマス損失変化が大きく、小さ
いところではその変化は小さい。アジマスθの値は微小
であるため、これを容易に測定するためには、θの微小
な変化に対してもアジマス損失が大きく変化するような
πWθ/λの領域で行うほうがよい。通常回転形記録媒
体では内周側では記録波長は小さく、外周側では大きい
ため、従来のアジマス測定媒体にば内周側にのみアジマ
ス情報を記録してπWθ/λの値の大きい領域でアジマ
スの測定を行っている。
πWθ determines the azimuth loss as seen from the first equation
FIG. 3 shows the relationship between /λ and the above azimuth loss (dB). As can be seen from this figure, the change in azimuth loss is large where the value of πWθ/λ is large, and the change is small where the value of πWθ/λ is small. Since the value of azimuth θ is minute, in order to easily measure it, it is better to measure it in the range of πWθ/λ, where the azimuth loss changes greatly even with a minute change in θ. In a normal rotating recording medium, the recording wavelength is small on the inner circumference side and large on the outer circumference side, so in a conventional azimuth measurement medium, azimuth information is recorded only on the inner circumference side and the azimuth is measured in the region where the value of πWθ/λ is large. Taking measurements.

しかし、第4図に示す如く媒体4の半i蚤方向(0は中
心)に対して磁気へノド1のギヤ・ノブ2が媒体4の磁
化方向3にたいして傾く原因としては2つ考えられる。
However, as shown in FIG. 4, there are two conceivable reasons why the gear knob 2 of the magnetic nozzle 1 is tilted with respect to the magnetization direction 3 of the medium 4 with respect to the half-i direction (0 is the center) of the medium 4.

1つは磁気−・ノドの取イ1り時の組立誤差。もう1つ
iよ磁気−・21月の平行移動によるズレがある。即ち
、磁気ヘッド■が矢印yの方向に平行移動して、磁気ヘ
ット1”の位置にくればギャップ2° と媒体4の磁化
方向3゛の成す角度はθ2となる。磁気−・ノドlと磁
化方向3との成す角度を07とすると、磁気−・ノ1の
平行移動の方向が媒体の半(¥方向よりXだけズして取
付けられていれば、θ、NO!Lとなってしま・)。
One is the assembly error when removing the magnetic throat. One more thing: magnetic field - there is a shift due to the parallel movement of the 21st month. That is, when the magnetic head (2) moves in parallel in the direction of the arrow y and comes to the position of the magnetic head 1'', the angle formed by the gap 2° and the magnetization direction 3'' of the medium 4 becomes θ2. If the angle formed with the magnetization direction 3 is 07, then the direction of parallel movement of magnetism 1 is half of the medium (if it is installed offset by X from the \ direction, θ, NO!L).・).

したがって従来のアジマス測定用媒体を用いて内周側の
トラックでアジマスを測定しても、磁気ヘッドが外周側
に平行移動すればアジマスが異な−、たちのになってし
まう。
Therefore, even if the azimuth is measured on the inner track using a conventional azimuth measurement medium, the azimuth will be different if the magnetic head moves parallel to the outer track.

(d)発明の目的 本発明の目的はアジマス1jllJ定情報を外周側や中
間のトラックにも記録することによって〔〃気ヘットの
平行移動によるアジーマスをも測定できるようになアジ
マス測定媒体を提供ずろごとにある。
(d) Object of the Invention The object of the present invention is to provide an azimuth measurement medium that can also measure azimuth due to parallel movement of a head by recording constant azimuth information on the outer circumferential side and intermediate tracks. There is one for each.

(e1発明の構成 そしてこの発明の目的は、同心円状の1友数のトランク
を有する回転形磁気記録媒体において。
(el) The structure of the invention and the object of the invention are a rotating magnetic recording medium having one concentric trunk.

前記複数のトラックのうち、少なくとも内周側の1トラ
ツクと外周側の1トラックとに磁気・\7ドのアジマス
測定用の情報が記録されているご占を特徴とする磁気ヘ
ノ]のアジマス測定媒体を1足供することによって達成
される。
Azimuth measurement of a magnetic hexagon, characterized in that information for azimuth measurement of a magnetic field is recorded in at least one track on the inner circumference side and one track on the outer circumference side among the plurality of tracks. This is accomplished by providing a pair of media.

(f)発明の実施例 以下本発明の一実施例をフに1ノビ−ディスク装置を例
に説明する。
(f) Embodiment of the Invention An embodiment of the present invention will be described below by taking a Novy disk device as an example.

前記したようなアジマス情(i[i記録方法にjif=
−:Jてアジマス測定媒体の最外周(;J近のトランク
(1ラツク8)と最内周付近のトラック(トシノク6;
))にアジマス情報を記録する。
The azimuth information (i[i recording method jif=
-: The outermost circumference of the azimuth measurement medium at J (; the trunk near J (1 rack 8) and the track near the innermost circumference (toshinoku 6;
)) Record the azimuth information.

このアジマス測定媒体をアジマスの測定すべきフロンピ
ーディスク装置に装填し、磁気ヘッドをせて、この位置
におけるアジマス0Σを測定する。
This azimuth measuring medium is loaded into a floppy disk device whose azimuth is to be measured, a magnetic head is placed thereon, and the azimuth 0Σ at this position is measured.

磁気ヘッドの平行移動による位置ズレXが0てないとき
、n1\r〜とノ1yる。
When the positional deviation X due to parallel movement of the magnetic head is not zero, n1\r~.

なお、必要におうして、内周側のトラ・ツクと外周側の
トラックの間の中間のトラックにアンマス測定情報を記
録しておりば、より正確なアジマスの測定が可能になる
It should be noted that if necessary, the unmass measurement information is recorded on a track intermediate between the track on the inner circumference side and the track on the outer circumference side, thereby making it possible to measure the azimuth more accurately.

なお2本発明はフロッピーディスク装置だのでなくその
他の互換性のある装置(ディスクパンク装置等)にも同
様の効果がある。
Note that the present invention has similar effects not only on floppy disk devices but also on other compatible devices (disk puncture devices, etc.).

+g+発明の効果 以上のように本発明によれは、磁気へ・ノドの平行移動
による位置ズレによ−ってηユするアジマスをも測定で
きるため、より正確なアジマスの測定が可能になった。
+g+Effects of the Invention As described above, according to the present invention, it is possible to measure azimuth that changes η due to positional deviation due to parallel movement of the throat due to magnetism, making it possible to measure azimuth more accurately. .

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

第1図はアジマスについて説明するだめの図。 第2図は従来のアジマス測定情報記録方法を説明するた
めの図、第3図はアジマス情報失とθ/ A l/、/
関係を表すグラフ、第4図は磁気ヘッドの平行移動によ
るアジマスの変化につい°ζ説明するための図面の浄書
(内容1こ変更なし) 第 1 菌 第 4 図 手続補正書(方式) 昭和6?+1λ IIノ011 1事f1の表ボ 3Illi正を−(−る古
Figure 1 is a diagram for explaining azimuth. Fig. 2 is a diagram for explaining the conventional azimuth measurement information recording method, and Fig. 3 shows azimuth information loss and θ/A l/, /
A graph showing the relationship, Figure 4 is an engraving of a drawing to explain the change in azimuth due to parallel movement of the magnetic head (content 1 remains unchanged). 1. Figure 4. Procedure amendment (method) 1932? +1λ IIノ011 1 thing f1 table 3Illi positive -(-ru old

Claims (1)

【特許請求の範囲】 1ン同心円伏の複数のトランクを有する回転形磁気記録
媒体において。 前記複数のトラックのうち、少なくとも内周側の1トラ
ンクと外周側の1トランクとに磁気′・7ト′のアジマ
ス測定用の清報が記録されているご上を特徴とする磁気
ヘッドのアジマス測定媒体。
[Scope of Claim] A rotating magnetic recording medium having a plurality of concentric trunks. An azimuth of a magnetic head characterized in that, among the plurality of tracks, at least one trunk on the inner circumferential side and one trunk on the outer circumferential side are recorded with information for measuring the azimuth of magnetic '7'. Measuring medium.
JP19673983A 1983-10-20 1983-10-20 Azimuth measurement medium of magnetic head Pending JPS6087420A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19673983A JPS6087420A (en) 1983-10-20 1983-10-20 Azimuth measurement medium of magnetic head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19673983A JPS6087420A (en) 1983-10-20 1983-10-20 Azimuth measurement medium of magnetic head

Publications (1)

Publication Number Publication Date
JPS6087420A true JPS6087420A (en) 1985-05-17

Family

ID=16362792

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19673983A Pending JPS6087420A (en) 1983-10-20 1983-10-20 Azimuth measurement medium of magnetic head

Country Status (1)

Country Link
JP (1) JPS6087420A (en)

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