JPS59113523A - Track holder for magnetic tape device - Google Patents

Track holder for magnetic tape device

Info

Publication number
JPS59113523A
JPS59113523A JP58233793A JP23379383A JPS59113523A JP S59113523 A JPS59113523 A JP S59113523A JP 58233793 A JP58233793 A JP 58233793A JP 23379383 A JP23379383 A JP 23379383A JP S59113523 A JPS59113523 A JP S59113523A
Authority
JP
Japan
Prior art keywords
head
track
magnetic
magnetic tape
deflection member
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
JP58233793A
Other languages
Japanese (ja)
Inventor
ハンス−ヨアヒム・キリマン
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of JPS59113523A publication Critical patent/JPS59113523A/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
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/46—Controlling, regulating, or indicating speed
    • G11B15/467—Controlling, regulating, or indicating speed in arrangements for recording or reproducing wherein both record carriers and heads are driven
    • G11B15/473—Controlling, regulating, or indicating speed in arrangements for recording or reproducing wherein both record carriers and heads are driven by controlling the speed of the heads
    • G11B15/4731—Controlling, regulating, or indicating speed in arrangements for recording or reproducing wherein both record carriers and heads are driven by controlling the speed of the heads control of headwheel rotation
    • G11B15/4733—Controlling, regulating, or indicating speed in arrangements for recording or reproducing wherein both record carriers and heads are driven by controlling the speed of the heads control of headwheel rotation with provision for information tracking, e.g. for time base correction
    • 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
    • G11B5/584—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 tapes
    • G11B5/588—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 tapes by controlling the position of the rotating heads
    • G11B5/592—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 tapes by controlling the position of the rotating heads using bimorph elements supporting the heads

Landscapes

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

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 発明の関連する技術分野 本発明は、傾斜トラックが少くとも２つの回転する磁気
ヘッドによって走査され、該磁気ヘッドのヘッドギャッ
プが回転軸線に対して逆のアジマス角を成しており、か
つ該ヘッドギャップが、ヘッドがトラックに保持される
ようにするため実質的に半径方向に延在している電気機
械偏向部材上に配置されている、傾斜トラックに記録さ
れたビデオ信号を再生する場合の磁気テープ装置におけ
るトラック保持装置に関する。時間軸の誤差及びトラッ
ク走行の誤差を同時に補償するために、再生された信号
から相互に垂直な２つのベクトル方向に対する誤差信号
を取出し、磁気ヘッドを圧電偏向装置に固定することは
既に公知である（米国特許第４２６８８７４号明細書）
。前記偏向装置の偏向方向は、２つの誤差ベク）／Ｖの
方向を合成した方向となっている。こうした装置を用い
ることにより、包絡線信号の評価によって誤差の大きさ
を求めることができろ。この評価は、トラックの偏位を
表わしている。同時に、取出された信号に含−４ｉｚろ
クロック信号の位相と、基準信号源によって供給される
クロック信号の位相とを比較することにより、時間軸誤
差の必要な補償に対する尺度を求めることができる。公
知の装置の欠点は、圧電偏向装置を用いての磁気ヘッド
の相対運動の際に、２つの相互に独立した誤差量によっ
て同時に悪影響を受けろ点にある。存在する時間誤差の
補償は、それゆえ場合によってはトラック誤差を増大さ
せ逆効果となってしまう雑誌［Ｆｕｎｋｓｃｈａｕ　Ｊ
　、１９７９年、第２号、第７１頁〜第７４頁より１次
の点は公知である。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method in which an inclined track is scanned by at least two rotating magnetic heads, the head gaps of the magnetic heads forming opposite azimuth angles with respect to an axis of rotation. and the head gap is disposed on a substantially radially extending electromechanical deflection member to ensure that the head is retained in the track. The present invention relates to a track holding device in a magnetic tape device for reproducing signals. In order to simultaneously compensate for errors in the time axis and errors in track running, it is already known to extract error signals in two mutually perpendicular vector directions from the reproduced signal and to fix the magnetic head to a piezoelectric deflection device. (U.S. Patent No. 4,268,874)
. The deflection direction of the deflection device is a direction that is a combination of the two error vectors)/V. By using such a device, it is possible to determine the magnitude of the error by evaluating the envelope signal. This evaluation represents the deviation of the track. At the same time, by comparing the phase of the clock signal included in the extracted signal with the phase of the clock signal provided by the reference signal source, a measure for the necessary compensation of time base errors can be determined. A disadvantage of the known device is that the relative movement of the magnetic head using the piezoelectric deflection device is affected simultaneously by two mutually independent error quantities. Compensation for existing time errors can therefore in some cases increase the tracking error and be counterproductive [Funkschau J.
, 1979, No. 2, pp. 71-74, the first-order point is known.

即ち、直接に隣接している磁気トラックにおける漏話を
低減するために、連続する磁気ヘッドのヘッドギャップ
のアジマス角が相互にずれている磁気テープ装置におい
ては、誤差走査によって同時に時間誤差が生じ、この時
間誤差は電子技術により補償しなければならない。That is, in a magnetic tape device in which the azimuth angles of the head gaps of successive magnetic heads are shifted from each other in order to reduce crosstalk in directly adjacent magnetic tracks, time errors occur simultaneously due to error scanning, and this Time errors must be compensated for electronically.

発明の効果 こオｔに反し、特許請求の範囲第１項に記載の特徴を備
えた本発明による磁気テープ装置におけるトラック保持
装置は、発生するトラック誤差の補償のために圧電偏向
部材を用いることができるという利点を有する。その際
、使用される磁気ヘッドは異なるアジマス角度を有する
にもかかわらず、トラック保持誤差の補償の際、いかな
る付加的時間誤差も再生信号に生ずることはない。Contrary to the above advantages of the invention, the track holding device in the magnetic tape device according to the present invention, which has the features set forth in claim 1, uses a piezoelectric deflection member to compensate for tracking errors that occur. It has the advantage of being able to In this case, even though the magnetic heads used have different azimuth angles, no additional time errors occur in the reproduced signal during the compensation of track-keeping errors.

実施例の説明 図に磁気テープ１の略図を示す。この磁気テープは、作
動の際には磁気テープ装置の走査装置に公知のように螺
旋状に巻きつけられる。その際、走査装量のヘッドドラ
ム又はヘッドディスク上″に設けられた数個の磁気ヘッ
ド（それらのうちの１つを図において２で示しである）
は、磁気テープ１の長手軸線に対して斜めに形成された
平行なトラック３，４を描（。磁気テープ１は、記録又
は再生過程の間は矢印５の方向に定行する。一方磁気テ
ープ上のトラックは、矢印６の方向に描かれる。各トラ
ックは、テレビフレーム画、又はフィールド画、又はそ
オｔらの一部の内容を記録している。その結果、各トラ
ックにおいて、実際のテレビジョン走査線の画像内容に
相応する磁化状態７と同期信号を表わす磁化状態８とが
交互に現われる。A schematic diagram of the magnetic tape 1 is shown in the explanatory diagram of the embodiment. During operation, this magnetic tape is wound in a spiral manner in a known manner around the scanning device of a magnetic tape device. In this case, several magnetic heads (one of which is designated by 2 in the figure) are provided on the head drum or head disk of the scanning unit.
depicts parallel tracks 3, 4 formed obliquely to the longitudinal axis of the magnetic tape 1 (the magnetic tape 1 moves normally in the direction of the arrow 5 during the recording or reproducing process. The upper tracks are drawn in the direction of arrow 6. Each track records the content of a television frame picture, or field picture, or a portion thereof. As a result, in each track, the actual A magnetization state 7 corresponding to the picture content of the television scan line and a magnetization state 8 representing a synchronization signal alternate.

できるだけ記録密度を高くするために、本発明による実
施例においては、公知のように、トラックは、隙間なし
に相並んで形成される。その際、漏話を抑圧するために
、同期信号をま、隣接する走査線において順次数べて配
置されている。漏話を抑圧するための他の方法として、
ヘッド輪の周囲に直径方向に対向して配置された２つの
磁気ヘッド（この２つのうちの１つを図中の２に示す）
のヘッドギャップ９のアジマス角度を異ならせである。In order to obtain as high a recording density as possible, in an embodiment according to the invention, the tracks are formed next to each other without gaps, as is known in the art. At this time, in order to suppress crosstalk, synchronizing signals are also sequentially arranged in a number of adjacent scanning lines. Another way to suppress crosstalk is to
Two magnetic heads are arranged diametrically opposite each other around the head ring (one of these two is shown at 2 in the figure).
The azimuth angle of the head gap 9 is made different.

さらに、磁気へ・ノド（まヘッドディスク上に直接に固
定さ２ｔておらず、公知の偏向部材、例えば２つの条片
１０，１１より構成されたアーム１３を介挿して固定さ
れている。前記アームは、相互に逆に分十至さＪｔて連
結さＪｔだ圧電セラミック材料より成る。その際、充填
部分１２を磁気へ・ノド２と、この磁気ヘッド側の圧電
セラミック材料１１との１用に設けろことにより、ヘッ
ドギヤ・ノブ９の方向と圧電偏向部材１１との間の角度
γが９０°となることが保証される。同様にして、同一
の又（ま類似の充填部分（図示しない）により、圧電偏
向部材１３は、ヘッド輪、又はへ・ノドディスク、又は
ヘッドドラム上に、磁気へ・ノド２のへ・ノド鏡面の主
要延在方向が矢印６の方向と一致するような角度で固定
さＪ”Ｌろ。図示されていない第２の磁気ヘッドは、ト
ラック４を記録するための他のアジマス角を有している
ので、磁気ヘッドを圧電偏向部材上に固定するため、お
よびこの偏向部材をヘッド輸上に固定するため充填部分
を、上述の構成とは鏡像対称に実施することも可能であ
る。Furthermore, the magnetic throat (2t) is not directly fixed on the head disk, but is fixed by interposing a known deflection member, for example, an arm 13 composed of two strips 10 and 11. The arms are made of piezoelectric ceramic material and are connected to each other at a distance Jt in opposite directions.In this case, the filling part 12 is connected to the magnetic nod 2 and the piezoelectric ceramic material 11 on the side of the magnetic head is connected to the filling part 12. This ensures that the angle γ between the direction of the headgear knob 9 and the piezoelectric deflection member 11 is 90°. Similarly, the same or similar filling part (not shown) Accordingly, the piezoelectric deflection member 13 is placed on the head ring, throat disk, or head drum at an angle such that the main extending direction of the mirror surface of the magnetic throat 2 coincides with the direction of the arrow 6. A second magnetic head, not shown, has a different azimuth angle for recording track 4, so it is necessary to fix the magnetic head on the piezoelectric deflection member and this It is also possible to implement the filling part for fixing the deflection element on the head in mirror symmetry with respect to the above-described configuration.

再生作動の際に磁気ヘッド、例えば磁気ヘッド２が所定
のトラック３からそれると、磁気テープ装置が正常に作
動している際には、圧電偏向部材１３は、相応する誤信
号の評価に従って、磁気ヘッド２を再びトラック３と一
致させようとする。磁気ヘッド２がトラック３の傍へ移
動する結果、ヘッドギャップ９がアジマス角αを成して
傾斜していることにより、時間誤差が生じる。この時間
誤差は、前記アジマス角αの余弦によって定まる。磁気
テープ装置のヘッド輸用及びテープ駆動用のサーボ制御
回路は、時間誤差が現われる際に、例えばヘッド輸の位
相を、時間誤差ができるだけ消去されろように制御する
。圧電偏向部材１３が、ヘッドディスク上においてヘッ
ドディスクの周方向ベクトルに苅してアジマス角αを成
して傾斜していることにより、トラックからそれた磁気
ヘッド２をトラック３に復帰させる際には時間誤差の操
作は行われない。なぜなら、ヘッドギャップ０の延在方
向が、圧電偏向装置１３の偏向方向と一致するからであ
る。従って時間誤差を補償するために設けられたサーボ
制御回路は、トラック追従−サーボ制御回路の存在及び
作用に依存することなく最適化することができる。さら
にこのサーボ制御回路は一層有利に設計することができ
ろ。なぜなら、磁気ヘッドのトラック追従変化運動によ
り生ずる突然の時間軸誤差が生じないからである。If a magnetic head, for example magnetic head 2, deviates from a predetermined track 3 during a playback operation, during normal operation of the magnetic tape device, the piezoelectric deflection element 13, according to the evaluation of a corresponding error signal, An attempt is made to bring the magnetic head 2 into alignment with the track 3 again. As a result of the movement of the magnetic head 2 to the side of the track 3, a time error occurs because the head gap 9 is tilted at an azimuth angle α. This time error is determined by the cosine of the azimuth angle α. A servo control circuit for the head transfer and tape drive of a magnetic tape device controls, for example, the phase of the head transfer when a time error appears so that the time error is eliminated as much as possible. Since the piezoelectric deflection member 13 is tilted at an azimuth angle α in the circumferential vector of the head disk on the head disk, when the magnetic head 2 which has deviated from the track is returned to the track 3, No time error manipulation is performed. This is because the direction in which the head gap 0 extends coincides with the deflection direction of the piezoelectric deflection device 13. The servo control circuit provided to compensate for time errors can therefore be optimized independently of the presence and operation of the track following servo control circuit. Furthermore, this servo control circuit could be designed even more advantageously. This is because there is no sudden time axis error caused by the track following change movement of the magnetic head.

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

図は、磁気テープの略図である。 The figure is a schematic diagram of a magnetic tape.

Claims (1)

【特許請求の範囲】 土　傾斜トラックが少くとも２つの回転する磁気ヘッド
によって走査され、該磁気ヘッドのヘッドギャップが、
回転軸線に対して逆のアジマス角を成しており、かつ該
ヘッドギャップが、ヘッドがトラックに保持されるよう
にするため実質的に半径方向に延在している電気機械偏
向部材上に配置されている、傾斜トラックに記録された
ビデオ信号を再生する場合の磁気テープ装置におけるト
ラック保持装置において、電気機械偏向部材（１３）を
、その偏向方向が磁気ギャップ（９）の延在方向と一致
するように、アジマス角（α）を成してヘッドディスク
上に配置したことを特徴とする、磁気テープ装置におけ
るトラック保持装置。 ２、電気機械偏向部材（１３）を、相互に逆に分極した
圧電セラミック材料より成る２つの相互に連結された条
片（１１，１２）で構成した、特許請求の範囲第１項に
記載の装置。 ３、＜さび角αを有する喫形の充填部分を、ヘッド輪と
電気機械偏向部材（１３）との間、及び偏向部材（１３
）と磁気ヘッド（２）との間に、偏向部材（１３）が走
査方向に対して角度αだけ傾斜するようにして配置した
、特許請求の範囲第１項又は第２項に記載の装置。[Claims] An inclined track is scanned by at least two rotating magnetic heads, and the head gap of the magnetic heads is
disposed on an electromechanical deflection member that is at an opposite azimuth angle to the axis of rotation and that the head gap extends substantially radially to maintain the head in track; In a track holding device in a magnetic tape device for reproducing a video signal recorded on an inclined track, the electromechanical deflection member (13) is arranged so that its deflection direction coincides with the extending direction of the magnetic gap (9). A track holding device for a magnetic tape device, characterized in that the track holding device is arranged on a head disk at an azimuth angle (α) such that 2. The electromechanical deflection element (13) is constituted by two interconnected strips (11, 12) of mutually oppositely polarized piezoceramic material. Device. 3. A curved filling portion having a rust angle α is placed between the head wheel and the electromechanical deflection member (13) and between the deflection member (13).
3. The apparatus according to claim 1, wherein the deflecting member (13) is arranged between the magnetic head (2) and the magnetic head (2) so as to be inclined at an angle α with respect to the scanning direction.
JP58233793A 1982-12-18 1983-12-13 Track holder for magnetic tape device Pending JPS59113523A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE32469896 1982-12-18
DE19823246989 DE3246989A1 (en) 1982-12-18 1982-12-18 Tracking arrangement in a magnetic tape device

Publications (1)

Publication Number Publication Date
JPS59113523A true JPS59113523A (en) 1984-06-30

Family

ID=6181093

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58233793A Pending JPS59113523A (en) 1982-12-18 1983-12-13 Track holder for magnetic tape device

Country Status (2)

Country Link
JP (1) JPS59113523A (en)
DE (1) DE3246989A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53119011A (en) * 1977-03-26 1978-10-18 Sony Corp Automatic tracking device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4165523A (en) * 1976-03-19 1979-08-21 Ampex Corporation Automatic scan tracking using an additional sensing means on a bimorph
DE2713194A1 (en) * 1977-03-25 1978-10-05 Basf Ag SYSTEM FOR THE TRACK CONTROL OF MAGNETIC HEADS
JPS54117627A (en) * 1978-03-06 1979-09-12 Sony Corp Video signal reproducing device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53119011A (en) * 1977-03-26 1978-10-18 Sony Corp Automatic tracking device

Also Published As

Publication number Publication date
DE3246989A1 (en) 1984-06-20
DE3246989C2 (en) 1990-07-12

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