JPS5930269A - Feed device of magnetic head - Google Patents
Feed device of magnetic headInfo
- Publication number
- JPS5930269A JPS5930269A JP13896382A JP13896382A JPS5930269A JP S5930269 A JPS5930269 A JP S5930269A JP 13896382 A JP13896382 A JP 13896382A JP 13896382 A JP13896382 A JP 13896382A JP S5930269 A JPS5930269 A JP S5930269A
- Authority
- JP
- Japan
- Prior art keywords
- head
- magnetic head
- circuit
- pulse motor
- phase current
- 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.)
- Granted
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
- G11B5/59605—Circuits
- G11B5/59611—Detection or processing of peak/envelop signals
-
- 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
- G11B5/54—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 into or out of its operative position or across tracks
- G11B5/55—Track change, selection or acquisition by displacement of the head
- G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
- G11B5/5565—Track change, selection or acquisition by displacement of the head across disk tracks system adaptation for compensation of variations of physical parameters, e.g. temperature
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Moving Of The Head To Find And Align With The Track (AREA)
- Control Of Stepping Motors (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、ディスク状の記録媒体を用いた磁気記録再生
装置における磁気ヘッドの送り装置に関するもので、そ
の目的とするところは、信号記録時（書き込み時）のヘ
ッドの位置に対して、再生時（読み出し時）のヘッド位
置のズレを補正するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic head feeding device in a magnetic recording/reproducing device using a disk-shaped recording medium, and its purpose is to feed a magnetic head during signal recording (writing). This is to correct the deviation of the head position during reproduction (reading) with respect to the position.
従来、この種の磁気記録再生装置に使われているヘッド
位置決め装置（ポジショナ−）には、通常閉ループ系に
よって位置決めをするものと、開ループ系で位置決めを
するものがある。Conventionally, head positioning devices (positioners) used in this type of magnetic recording/reproducing apparatus include those that normally perform positioning using a closed loop system and those that perform positioning using an open loop system.
開ループ方式による従来のヘッド位置決め方式を第１図
に示す。図示の如く、駆動源としてパルスモータ６を使
・い、所定位置巡会ノドを移動させるに必要なだけコン
トロール回路１でパルスを発生し、パルスモータドライ
ブ回路２によってパルスモータの各相に電流を供給した
り、その方向を切りかえることにより、パルスモータを
所定の量だけ回転させている。A conventional head positioning method using an open loop method is shown in FIG. As shown in the figure, a pulse motor 6 is used as a drive source, a control circuit 1 generates pulses as many times as necessary to move the gutter to a predetermined position, and a pulse motor drive circuit 2 applies current to each phase of the pulse motor. The pulse motor is rotated by a predetermined amount by supplying it or switching its direction.
パルスモータの軸力回転することにより、モータのシャ
フトにα状に巻付は固定され、なお両端が移動台に固定
されている金属ベルト４が、どちら側かへ巻き付き、そ
れに従って、移動台５の一端がベルトに引き寄せられて
一方側（ディスク側かその反対方向）に移動し、それに
よって磁気ヘッド６の位置も移動するという構成であっ
た。As the axial force of the pulse motor rotates, the metal belt 4, which is fixedly wound around the shaft of the motor in an α-shape and whose both ends are fixed to the moving table, wraps around to either side, and accordingly, the moving table 5 One end of the magnetic head 6 was pulled by the belt and moved to one side (toward the disk or the opposite direction), and the position of the magnetic head 6 was thereby moved.
この方式による位置決め精度は、パルスモータの停止角
度精度とか、機構上の間隙、温度変化による各素子・各
部品の寸法変化等を総合したもので決定され、ヘッド信
号をフィードバックしてサーボをかける閉ループ位置決
め方式に比べて、位置決め精度が悪いという欠点があっ
た。しかし、閉ループ方式に比べてかなり低価格でかつ
小型の位置決め機構が実現できると（・うことで広く使
われてし・る。The positioning accuracy of this method is determined by a combination of factors such as the stopping angle accuracy of the pulse motor, gaps in the mechanism, and dimensional changes in each element and component due to temperature changes, and is a closed loop that feeds back the head signal and applies the servo. Compared to the positioning method, this method has the disadvantage of poor positioning accuracy. However, compared to the closed-loop method, it is possible to realize a positioning mechanism that is much cheaper and more compact, so it has become widely used.
本発明は、この開ループ方式による従来の欠点に鑑みな
されたもので、簡単な構成で、従来にない位置決め精度
を得ることができる磁気へノドの送り装置を提供しよう
とするものである。The present invention has been made in view of the drawbacks of the conventional open-loop system, and it is an object of the present invention to provide a magnetic nod feeding device that has a simple configuration and can obtain positioning accuracy that has never been seen before.
従来の磁気記録再生装置は、ディスク上にすでに記録し
であるデータの必要な箇所を読み出したとき、データに
工、ラーが含まれているか否かを常にホストシステムで
チェックしながら、データの送受をしており、もしもエ
ラーがあると判断した時には、磁気記録再生装置はその
箇所について再度読み出しを繰り返し、数回読み出しを
し直しても尚、正しい読出し信号が得られないときは、
システムエラーとして処理している。When a conventional magnetic recording/reproducing device reads out a necessary part of data that has already been recorded on a disk, the host system constantly checks whether the data contains any errors or errors while transmitting and receiving the data. If it is determined that there is an error, the magnetic recording/reproducing device repeats the readout of that location, and if the correct readout signal is still not obtained even after rereading several times,
It is treated as a system error.
本発明は、このようなときヘッド位置を小刻みにそして
次第に大刻みに動がして、正しくデータをリード可能と
なる位置迄補正を行うための具体的方法である。The present invention is a specific method for correcting the head position in such a case by moving the head position in small steps and then gradually in large steps until it reaches a position where data can be read correctly.
以下図面によって本発明の詳細な説明する。The present invention will be explained in detail below with reference to the drawings.
第２図は、オフトラックしているヘッドを本発明により
正しくトラック上へ補正するための、パルスモータ軸の
動がし方を示すものである。FIG. 2 shows how the pulse motor shaft is moved in order to correctly correct an off-track head onto the track according to the present invention.
第３屋は、第２図で示したような動がし方を実現するた
めの具体的な実施方法を示すブロック図である。The third part is a block diagram showing a specific implementation method for realizing the movement shown in FIG. 2.
従来の開ループによるヘッド位置決めで、モータが１ス
テツプ（１トラック間隔）分送られ、第２図のＯの位置
で停止したとする。しがしその停止位置が、前記のよう
な理由により書き込み時のトラック位置とは少しズした
所であったとしても、そのズした位置において再生する
しか仕方がなかった。従って比較的大きなオフトラック
の場合には、再生レベルが小さくなったり、隣接トラッ
クの信号をも再生してしまったりして、信号を正しく読
み出すことが不可能になることがしばしば生じた。Assume that in conventional open-loop head positioning, the motor is advanced by one step (one track interval) and stopped at position O in FIG. However, even if the stop position is slightly shifted from the track position at the time of writing due to the above-mentioned reasons, there is no choice but to reproduce the data at the shifted position. Therefore, in the case of a relatively large off-track, the reproduction level becomes low or the signal of an adjacent track is also reproduced, making it often impossible to read out the signal correctly.
本発明は、このような時パルスモータの相電流を少し変
えて、まず第２図で示すならばＯの位置から■の位置ヘ
モータ軸を移動し、その位置で再度ディスク上のデータ
を読み出し、まだ再生信号にエラーが含まれる場合は、
角を■の位置へ移動しまたデータを読み出す。それでも
まだエラーが含まれている場合は、さらに次々と角■→
角５■・・・・・・と所定量づつ停止角を次第に増加さ
せながら、前記ヘッドが、前後進する如くパルスモータ
の軸を振動させることにより、トラック上の信号を正し
く読み出せる位置までパルスモータの相電流を小刻みに
変えることを提案するものである。In such a case, the present invention slightly changes the phase current of the pulse motor, first moves the motor shaft from the position O to the position ■ as shown in Fig. 2, and reads the data on the disk again at that position. If the playback signal still contains errors,
Move the corner to the ■ position and read the data again. If the error still exists, continue to
By vibrating the shaft of the pulse motor so that the head moves back and forth while gradually increasing the stop angle by a predetermined amount such as angle 5■..., the pulse is increased until the signal on the track can be read correctly. This proposal proposes changing the motor phase current in small increments.
第２図（ａ）は、最初の停止位置Ｏを基準に、前後に交
互に所定量モータ軸を動かす方法を示し、第２図（ｂ）
は、第２図（ａ）をさらに改良した方法で、位置Ｏ′を
基準にするけれども、どちらか一方向へいったん所定量
動かしてその位置で正しく信号を読めないときは、同じ
方向のそのすぐ隣へ所定量動かし、それでも両正しい信
号を読めない場合には今度は、０′を基準に反対側へ軸
を動かすとり・う方法で、第２図（ａ）に示す方法より
も、モータ軸を小刻みに動かすに要する時間が少な（て
済む方法である。Fig. 2(a) shows a method of moving the motor shaft by a predetermined amount alternately back and forth based on the initial stop position O, and Fig. 2(b)
This method is a further improvement on the method shown in Fig. 2 (a). Although position O' is used as a reference, if the signal cannot be read correctly at that position after moving a certain amount in one direction, move the position immediately next in the same direction. If you move the shaft a predetermined amount to the next side, and still cannot read both correct signals, then move the shaft to the opposite side based on 0'. This is a method that requires less time to make small movements.
このような考え方を具体的に実現する方法を、第３図に
よって説明する。本発明を実現する第３図は、パルスモ
ータドライブ回路、パルスモータ、ヘッド移動台、磁気
ヘッドおよび、アンプ・録再信号処理回路・ディスクド
ライブ回路等からなる信号処理回路からなる従来の開ル
ープによるヘッド位置決め装置に、新もなｘ補正信号コ
ントローラ２０、補正信号発生回路２１、相電流可変回
路２２を附加してなるヘッド位置決め構成である。A method for concretely realizing such a concept will be explained with reference to FIG. FIG. 3 which realizes the present invention is based on a conventional open loop consisting of a pulse motor drive circuit, a pulse motor, a head moving table, a magnetic head, and a signal processing circuit consisting of an amplifier, a recording/reproducing signal processing circuit, a disk drive circuit, etc. This is a head positioning configuration in which a new x correction signal controller 20, a correction signal generation circuit 21, and a phase current variable circuit 22 are added to the head positioning device.
通常の状態では、信号処理回路１８からの指、令により
、目的のトラックまでバルスモ〜タドライブ回路１２よ
り供給される相電流の切りかえによって、パルスモータ
１６は所定の角度回転し、それ（Ｃ従ってヘッドキャリ
ッジ１５がスライドし、磁気ディスク上の所定の位置へ
磁気ヘッド１６が移動し停止する。Under normal conditions, the pulse motor 16 rotates by a predetermined angle by switching the phase current supplied from the pulse motor drive circuit 12 to the target track in response to commands from the signal processing circuit 18. The head carriage 15 slides, and the magnetic head 16 moves to a predetermined position on the magnetic disk and stops.
磁気ヘッド１６の位置決めが完了すると、ディスク上の
信号を磁気ヘッド１６で読み出し、信号処理回路１８で
処理してホストシステム（ホストコンヒュータ）１９へ
送る。ホストシステム１９では、送られて来た読み出し
信号の中のＩＤフィールドあるいはＤ Ａ ＴＡフィー
ル１．ドの中に、エラーかあるか否か絶えずチェックし
ていて、もしもエラーが含まれているときには、ホスト
７ステム１９から、再読み出しの要求またはエラーあり
を伝える信号が、信号処理回路１８へ戻される。When the positioning of the magnetic head 16 is completed, signals on the disk are read by the magnetic head 16, processed by a signal processing circuit 18, and sent to a host system (host computer) 19. The host system 19 uses the ID field or DATA field 1. in the read signal sent. The host 7 stem 19 constantly checks whether there is an error in the code, and if an error is found, a signal is sent back to the signal processing circuit 18 from the host 7 stem 19 to request rereading or to indicate that there is an error. It will be done.
信号処理回路１８は、再読み出し要求あるいはエラーあ
りの信号を受けると、直ちに補正信号コントローラ２０
へこｎを伝える。Upon receiving a reread request or an error signal, the signal processing circuit 18 immediately sends a correction signal controller 20 to the correction signal controller 20.
Convey the dent.
このとき補正信号コントローラ２０では、第２図の如く
パルスモータ軸を動かすためには、Ａ相とＢ相のどちら
側の相の電流をどの程度可変すべきかの信号を、補正信
号発生回路のＡ相側２１ａかＢ相体２１ｂのいづれかを
選択して出力する。At this time, in order to move the pulse motor shaft as shown in FIG. Either the phase side 21a or the B phase body 21b is selected and output.
この信号により該当する補正信号発生回路は、所定量パ
ルスモータ軸が微少回転するに要する相電流を減少させ
る信号を発生し該当する相電流可変回路２２ａまたは２
２ｂへ伝える。該当した相電流可変回路２２は補正信号
に従って相電流を可変する。This signal causes the corresponding correction signal generation circuit to generate a signal to reduce the phase current required for the pulse motor shaft to slightly rotate by a predetermined amount.
Tell 2b. The corresponding phase current variable circuit 22 varies the phase current according to the correction signal.
２相のうち一方の相電流量が変わると、それに従ってモ
ータのロータの静止安定点が変わり、モータシャフトの
停止位置が変わる。この動きに比例してヘッドキャー、
リッジ１５が微少に動き、ヘッド位置も所定量移動して
前回読み出したトラックとは少しズレだ位置の信号を読
み出し、信号処理回路１８で再び処理してホストシステ
ム１９へ信号を送る。このようにしてデータが正しく読
み出せるようになる迄、以上のような動作を繰り返し進
めていくことによって、オフトラックによって正しく読
み出されなかったデータは、正しく読み出されるように
なるまでヘッド移置を補正することが可能となる。エラ
ーありの判断は、上記のようにホスト７ステム１９で行
わなくても、信号処理回路１８内部で判断回路を設けて
もよいし、あるいは、リードデータのエラーをチェック
する方法をとらなくても、リード信号の再生レベルが異
常に小さいか否かで補正の必要ありと判断して、上記ヘ
ッド位置補正操作をすることも可能である。When the amount of current in one of the two phases changes, the stationary stable point of the motor rotor changes accordingly, and the stopping position of the motor shaft changes accordingly. In proportion to this movement, the head carries,
The ridge 15 moves slightly and the head position also moves by a predetermined amount, reading out a signal at a position slightly shifted from the previously read track, processing it again in the signal processing circuit 18, and sending the signal to the host system 19. In this way, by repeating the above operations until the data can be read correctly, data that was not read correctly due to off-track can be moved by moving the head until it can be read correctly. It becomes possible to make corrections. The determination of whether there is an error does not need to be performed by the host 7 stem 19 as described above, but a determination circuit may be provided within the signal processing circuit 18, or the method of checking read data for errors may not be used. It is also possible to perform the head position correction operation by determining that correction is necessary depending on whether the reproduction level of the read signal is abnormally low.
小刻みにモータの相電流を可変するための、相電流可変
回路の具体的な回路構成を、第４図、第５図、第６図及
び第７図にそれぞれ示す。Specific circuit configurations of a phase current variable circuit for varying the motor phase current in small increments are shown in FIGS. 4, 5, 6, and 7, respectively.
第４図は、モータの相と並列に分流量が少しづつ異なる
分流回路を設けておき、次第に分流量が大きくなる回路
を順次選択゛することにより、モータの相電流を小刻み
に減少させる回路方式である。Figure 4 shows a circuit system in which shunt circuits with slightly different shunt flows are installed in parallel with the motor phases, and circuits with gradually increasing shunt flows are sequentially selected to gradually reduce the motor phase current. It is.
第４図で、ブリッジ状に接続されている各４個のトラン
ジスタＱ Ａ Ｉ〜Ｑ Ａ４およびＱ ｅ １〜Ｑ Ｂ
４は、パルスモータをバイポーラ駆動するためのスイノ
チングトランジスクであり、パルスモータの軸を通常の
ステップ送りさせるための各トランジスタの動作′状］
態１を表１に示す。In FIG. 4, four transistors Q A I to Q A4 and Q e 1 to Q B are connected in a bridge configuration.
4 is a switching transistor for bipolar driving the pulse motor, and the operation of each transistor is for normal step feeding of the shaft of the pulse motor.]
Condition 1 is shown in Table 1.
■→■→■→■・・・・・・とし、反時計回転させるに
は逆に■→■→■→■→■→■・・・・・・とすればよ
（・。■→■→■→■...... To rotate counterclockwise, do the opposite: ■→■→■→■→■→■...... (・.
分流招電流量選択用トランジスタＱＡ５〜Ｑ 人１０、
Ｑ Ｂ５〜ＱＢ１ｏ と、分流用トランジスタを選択回
路６１．６２．６６．６４は、本発明を実現するために
付加した回路である。トランジスタ選択回路は、実際に
はデコーダ回路あるいはマイクロブ凸セッサの■０ポー
ト回路で実現できる。Transistors QA5 to Q for selecting the amount of shunt induced current 10,
Q B5 to QB1o and the shunt transistor selection circuits 61, 62, 66, and 64 are circuits added to realize the present invention. The transistor selection circuit can actually be realized by a decoder circuit or a 0 port circuit of a microb convex processor.
第４図に示す回路で、モータ励磁コイル−相のみに電流
を流す回路を例にとって、ヘッド位置を補正するために
、相電流を微少ステップずつ可変する方法を第５図によ
って説明する。Taking as an example the circuit shown in FIG. 4 in which current flows only through the phases of the motor excitation coil, a method of varying the phase current in small steps in order to correct the head position will be described with reference to FIG.
通常の電流ループは、電源からトランジスタＱ Ａ１を
通ってモータコイルに流れ、トランジスタＱ Ａ４を径
由してＧＮＤへ流れる。もしあるトラック上でリードし
たデータにエラーありと判断されＡ相電流を可変させる
には、電源から供給される電流の一部をコイルの手前で
分流させればよい。A typical current loop flows from the power supply through transistor Q A1 to the motor coil, through transistor Q A4 to GND. If it is determined that there is an error in the data read on a certain track, and the A-phase current is to be varied, a portion of the current supplied from the power supply may be shunted before the coil.
そのためにはトランジスタＱ Ａ ｓ、Ｑ Ａ６、ＱＡ
□のうち℃・づれか１つをＯＮさせればよい。コレクタ
に接続する抵抗なＲ＋ ＞ Ｒ２＞ Ｒ３と段階的に選
んでおけば、Ｑ Ａ５よりＱＡ６、Ｑ Ａ６よりＱＡ□
が選択されたときの方が、より分流電流が多くなり、そ
れにつれて相電流が減少し、モータの静止位置は最初の
停止位置から所定量のズレな生ずる。各トランジスタは
、完全にＯＮかＯＦ” Ｉ”かのスイッチング動作をさ
せているので、各分流電流は抵抗のみで決めることがで
き、従ってかなり精度よく分流電流を決めることができ
るという特長がある。For that purpose, transistors QA s, QA6, QA
It is sufficient to turn on one of the □℃ and □. If you select the resistance connected to the collector in stages such as R+ > R2 > R3, QA6 will be smaller than QA5, and QA□ will be smaller than QA6.
When is selected, the shunt current increases, the phase current decreases accordingly, and the rest position of the motor deviates from the initial stop position by a predetermined amount. Since each transistor performs a completely ON or OF "I" switching operation, each shunt current can be determined only by the resistor, and therefore has the advantage that the shunt current can be determined with considerable accuracy.
トランジスタＱ Ａ ５、Ｑ Ａ６、Ｑ Ａ７の選択は
、分流量をどの程度にすべきかの２進コードをデコーダ
等でデコードすれば容易に可能であり、補正信号コント
ローラは、マイクロコンピュータ等で容易に実現できる
。The selection of transistors QA5, QA6, and QA7 can be easily made by decoding the binary code indicating how much the divided amount should be with a decoder, etc., and the correction signal controller can be easily selected with a microcomputer, etc. realizable.
同様に、相電流を可変するための他の実施例を第６図、
第７図に示す。Similarly, other embodiments for varying the phase current are shown in FIG.
It is shown in FIG.
第６図は、相電流をトランジスタＱＡ２で制御する方法
で、Ｑ Ａ Ｉ Ｉ −Ｑ Ａ ＋ ２、Ｑ Ａ ＋
３はそれぞれバイアス電流切換え用トランジスタ、Ｒ５
、Ｉ（２、Ｒ３は、バイアス電流を決める抵抗である。FIG. 6 shows a method of controlling the phase current with transistor QA2.
3 is a bias current switching transistor, R5
, I(2, R3 is a resistor that determines the bias current.
第７図は、相電流の流通時間を変えるもので、４１は基
準となる何段階かの設定電圧と相電流の積分′値とを比
較する比較回路、４２は単安定マルチバイブレークで、
相電流が所定時間以上になったら一定時間ＱＡ１のトラ
ンジスタをカットオフさせる。４６は相電流量検出用抵
抗、容量４４および抵抗４５は、相電流量検出用抵抗４
６で検出した値をレベルに変えるための積分回路を形成
している。In Fig. 7, the flow time of the phase current is changed. 41 is a comparator circuit that compares the set voltage of several stages as a reference and the integral' value of the phase current, 42 is a monostable multi-bi break,
When the phase current exceeds a predetermined time, the transistor QA1 is cut off for a predetermined time. 46 is a resistor for detecting phase current amount, and capacitor 44 and resistor 45 are resistor 4 for detecting phase current amount.
6 forms an integration circuit for converting the detected value into a level.
以上の如くの本発明の構成によれば、高級なサーボ系を
構成しなくても、正しくデータをリードできるようなヘ
ッド位置決めが実現可能である。According to the configuration of the present invention as described above, head positioning that allows correct data reading can be realized without configuring a high-grade servo system.
第１図は、従来使用されて（・る開ル−プの磁気ヘッド
の送り装置の構成を示す説明図、第２図（ａ）、（ｂ）
は本発明により、正しくトラック上へヘッドを補正させ
るためのノ＜ルースモーク軸の動かし方を示す説明図、
第３図は、第２図の具体的な駆動方法を示すブロック図
、第４図（ま第３図の具体的な実施例を示す回路図、第
５１．第６及び第７図は、パルスモータの一相だけの駆
動をｆｌＪにとった具体的実施例を示す回路図である。
１・・・・コントロール回路、
２・・・・・・パルスモータドライブ回路、６・・・・
・パルスモータ、４・・・・・・ベルト、５・・・・・
移動台、６・ ・・磁気ヘッド、７・・・・・ディスク
、
１２・・・・・・パルスモータドライブ回路、１ろ・・
・・・・パルスモータ、
１５・・・・・・ヘットキャリッジ、
１６・・・・・磁気ヘッド、１８・・・・・・信号処理
回路、１９・・・・・・ホストシステム、
２０・・・・・・補正信号コントローラ、２１・・・・
・・相補正信号発生回路、２２・・・・・・相電流可変
回路、
６１．６２．６６．６４・・・・・・分流用トランジス
タ選択回路、
４１・・・・・・比較回路、
４２・・・・・・単安定マルチバイブレーク、４６・・
・・・・相電流検出抵抗、
４５・・・・・・積分用抵抗、
第７図FIG. 1 is an explanatory diagram showing the configuration of a conventionally used open-loop magnetic head feeding device, and FIGS. 2(a) and (b)
is an explanatory diagram showing how to move the loose smoke axis in order to correctly correct the head onto the track according to the present invention;
3 is a block diagram showing the specific driving method of FIG. 2, FIG. 4 is a circuit diagram showing a specific example of the driving method shown in FIG. It is a circuit diagram showing a specific example in which only one phase of the motor is driven by flJ. 1... Control circuit, 2... Pulse motor drive circuit, 6...
・Pulse motor, 4...Belt, 5...
Moving table, 6...Magnetic head, 7...Disk, 12...Pulse motor drive circuit, 1ro...
... Pulse motor, 15 ... Head carriage, 16 ... Magnetic head, 18 ... Signal processing circuit, 19 ... Host system, 20 ... ...Correction signal controller, 21...
... Phase correction signal generation circuit, 22 ... Phase current variable circuit, 61.62.66.64 ... Shunt transistor selection circuit, 41 ... Comparison circuit, 42・・・・・・Monostable multi-bi break, 46...
...Phase current detection resistor, 45... Integral resistor, Fig. 7
Claims (1)
て、前記磁気ヘッド送り装置は、パルスモータドライブ
回路、相電流可変回路、補正信号発生回路、補正信号コ
ントローラ、パルスモータ、ヘッド移動台、磁気ヘット
等を備え、パルスモータを回転させ、所定の位置まで磁
気ヘッドを移動後、その位置で読出し時のデータにエラ
ーがあるときは、最初の停止位置を基準にして走査範囲
を所定量づつ増加させながら前記磁気へノドがトラック
上を前、後進する如くパルスモータの相電流を可変する
ことを特徴とする磁気ヘッドの送り装置。In a magnetic head feeding device in a magnetic recording/reproducing device, the magnetic head feeding device includes a pulse motor drive circuit, a variable phase current circuit, a correction signal generation circuit, a correction signal controller, a pulse motor, a head moving table, a magnetic head, etc. After rotating the pulse motor and moving the magnetic head to a predetermined position, if there is an error in the data read at that position, the scanning range is increased by a predetermined amount based on the initial stop position. A magnetic head feeding device characterized in that the phase current of a pulse motor is varied so that the magnetic head moves forward and backward on a track.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13896382A JPS5930269A (en) | 1982-08-10 | 1982-08-10 | Feed device of magnetic head |
| US06/479,892 US4581567A (en) | 1982-05-28 | 1983-03-29 | Device for feeding magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13896382A JPS5930269A (en) | 1982-08-10 | 1982-08-10 | Feed device of magnetic head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5930269A true JPS5930269A (en) | 1984-02-17 |
| JPH0416873B2 JPH0416873B2 (en) | 1992-03-25 |
Family
ID=15234266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13896382A Granted JPS5930269A (en) | 1982-05-28 | 1982-08-10 | Feed device of magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5930269A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55159468A (en) * | 1979-05-31 | 1980-12-11 | Konishiroku Photo Ind Co Ltd | Toner concentration control method of developer in electrophotographic type recorder |
| JPS5958672A (en) * | 1982-09-28 | 1984-04-04 | Fujitsu Ltd | Offset seek control system |
| EP0191247A2 (en) * | 1985-02-08 | 1986-08-20 | Ing. C. Olivetti & C., S.p.A. | Apparatus for recording and reading information on a magnetic disk |
| JPS6219654U (en) * | 1985-07-22 | 1987-02-05 | ||
| JPH0387842A (en) * | 1989-08-31 | 1991-04-12 | Canon Inc | Image forming method |
| JPH03168983A (en) * | 1989-11-28 | 1991-07-22 | Nec Gumma Ltd | Floppy disk device |
| JPH03268283A (en) * | 1990-03-16 | 1991-11-28 | Matsushita Electric Ind Co Ltd | Head positioning device |
| US5200783A (en) * | 1990-08-30 | 1993-04-06 | Sharp Kabushiki Kaisha | Black image density correcting device |
| KR100432504B1 (en) * | 1996-11-08 | 2004-09-04 | 삼성전자주식회사 | Method for retrying off-track read to data off-track write, particularly for reading data off-track written in process that head is shaken right and left by unstable settling or instantaneous shock |
-
1982
- 1982-08-10 JP JP13896382A patent/JPS5930269A/en active Granted
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55159468A (en) * | 1979-05-31 | 1980-12-11 | Konishiroku Photo Ind Co Ltd | Toner concentration control method of developer in electrophotographic type recorder |
| JPS638465B2 (en) * | 1979-05-31 | 1988-02-23 | Konika Kk | |
| JPS5958672A (en) * | 1982-09-28 | 1984-04-04 | Fujitsu Ltd | Offset seek control system |
| JPH0142072B2 (en) * | 1982-09-28 | 1989-09-08 | Fujitsu Ltd | |
| EP0191247A2 (en) * | 1985-02-08 | 1986-08-20 | Ing. C. Olivetti & C., S.p.A. | Apparatus for recording and reading information on a magnetic disk |
| JPS6219654U (en) * | 1985-07-22 | 1987-02-05 | ||
| JPH0524923Y2 (en) * | 1985-07-22 | 1993-06-24 | ||
| JPH0387842A (en) * | 1989-08-31 | 1991-04-12 | Canon Inc | Image forming method |
| JPH03168983A (en) * | 1989-11-28 | 1991-07-22 | Nec Gumma Ltd | Floppy disk device |
| JPH03268283A (en) * | 1990-03-16 | 1991-11-28 | Matsushita Electric Ind Co Ltd | Head positioning device |
| US5200783A (en) * | 1990-08-30 | 1993-04-06 | Sharp Kabushiki Kaisha | Black image density correcting device |
| KR100432504B1 (en) * | 1996-11-08 | 2004-09-04 | 삼성전자주식회사 | Method for retrying off-track read to data off-track write, particularly for reading data off-track written in process that head is shaken right and left by unstable settling or instantaneous shock |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0416873B2 (en) | 1992-03-25 |
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