JPH0729331A - Disk device and head seek device therefor - Google Patents

Disk device and head seek device therefor

Info

Publication number
JPH0729331A
JPH0729331A JP17130493A JP17130493A JPH0729331A JP H0729331 A JPH0729331 A JP H0729331A JP 17130493 A JP17130493 A JP 17130493A JP 17130493 A JP17130493 A JP 17130493A JP H0729331 A JPH0729331 A JP H0729331A
Authority
JP
Japan
Prior art keywords
head
disk
seek
drive mechanism
time
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
Application number
JP17130493A
Other languages
Japanese (ja)
Other versions
JP2586295B2 (en
Inventor
Shigeo Minami
茂雄 南
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 JP5171304A priority Critical patent/JP2586295B2/en
Publication of JPH0729331A publication Critical patent/JPH0729331A/en
Application granted granted Critical
Publication of JP2586295B2 publication Critical patent/JP2586295B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Landscapes

  • Moving Of Head For Track Selection And Changing (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)

Abstract

PURPOSE:To shorten the time of head seek when the coarse seeking is performed for a disk device. CONSTITUTION:The head 4 is put in a coarse seek mode which makes it to seek up to near the objective track among the tracks formed on the surface of the disk 2. Then, the time (t) required for coming up to near the objective track on the disk is calculated by a controller 8, and the voltage applying state on a head driving mechanism 7 is controlled also by the controller 8 in accordance with the time distributing rate of the speed increasing time t1 and the speed reducing time t2 of the head 4 settled in advance. By this procedure, the positive or negative acceleration is always placed on the head 4 at the time when the head 4 is moved to every objective track.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明はディスク装置のヘッドシ
ーク装置に関し,特にディスク上の目標トラック近くへ
ヘッドをシークさせる粗シークモードにおけるヘッドシ
ーク制御装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head seek device for a disk device, and more particularly to a head seek control device in a coarse seek mode for seeking a head near a target track on a disk.

【0002】[0002]

【従来の技術】従来のディスク装置のヘッドシークの特
に粗シークモードに関しては,図4に示すように,ヘッ
ドの粗シーク時においてヘッドの加速領域51,等速域
52(最高速度),及び減速領域53を予め決めておい
た台形状の速度プロフィル50をトレースするように制
御するヘッドシーク制御方式が提案されている(例えば
特開平03ー080476号公報,特開平03ー025
765号公報参照)。
2. Description of the Related Art As to a head seek of a conventional disk device, particularly in a rough seek mode, as shown in FIG. 4, during a rough seek of the head, a head acceleration region 51, a constant velocity region 52 (maximum velocity), and deceleration are provided. A head seek control method has been proposed in which the area 53 is controlled so as to trace a trapezoidal velocity profile 50 that has been determined in advance (for example, Japanese Patent Laid-Open Nos. 03-080476 and 03-025).
765).

【0003】一方,速度プロフィルは使わないが,ヘッ
ドの移動を順に加速,定速(最高速度),減速,停止の
プロフィルでとらえたヘッドシーク制御方式が提案され
ている(例えば特開平02ー195581号公報参
照)。
On the other hand, a head seek control system has been proposed in which the velocity profile is not used, but the head movement is captured in order of acceleration, constant velocity (maximum velocity), deceleration, and stop profile (for example, Japanese Patent Laid-Open No. 02-195581). (See the official gazette).

【0004】これら従来のヘッドシーク制御方式による
ヘッドのシーク制御は,ヘッドがディスクの半径方向に
移動した距離とそれに要した時間とによって現在のヘッ
ドの移動速度を計算し,これを予じめ定められた目標速
度と比較し計算することによってヘッド駆動機構への印
加電圧を調整することによっておこなわれる。
In the seek control of the head by these conventional head seek control methods, the current moving speed of the head is calculated based on the distance the head has moved in the radial direction of the disk and the time required for it, and this is determined in advance. This is done by adjusting the applied voltage to the head drive mechanism by comparing with the calculated target speed and calculating.

【0005】[0005]

【発明が解決しようとする課題】この従来のディスク装
置のヘッドシーク制御方式では,ヘッドをディスクの半
径方向に移動させる粗シークモードのとき,ヘッドが一
定速度(等速あるいは定速で最高速度)で移動する領
域,例えば,図4の符号52で示される領域がある。
In this conventional head seek control method for a disk device, the head is at a constant speed (maximum speed at constant speed or constant speed) in the coarse seek mode in which the head is moved in the radial direction of the disk. There is a region which moves in, for example, a region indicated by reference numeral 52 in FIG.

【0006】このために,ヘッドの粗シークモードのと
き,充分にシーク時間を短縮出来ないという問題があっ
た。
Therefore, there is a problem that the seek time cannot be shortened sufficiently in the coarse seek mode of the head.

【0007】そこで,本発明の技術的課題は,ディスク
装置の粗シーク時のヘッドシーク時間を短縮することが
できるヘッドシーク装置,及びそれを備えたディスク装
置を提供することにある。
Therefore, a technical object of the present invention is to provide a head seek device capable of shortening the head seek time at the time of rough seek of the disk device, and a disk device provided with the head seek device.

【0008】[0008]

【課題を解決するための手段】本発明によれば,ディス
ク上の情報の読み出し書き込みを行うヘッドをヘッド駆
動機構によって前記ディスクの半径方向に移動させるデ
ィスク装置用ヘッドシーク装置において,前記ヘッドを
前記ディスク上の目標トラック近くまでシークさせる粗
シークモードにて,前記ヘッドを移動させる際,前記ヘ
ッドが常に加速度を有するように前記ヘッド駆動機構の
動作を制御する制御装置を備えたことを特徴とするディ
スク用ヘッドシーク装置が得られる。
According to the present invention, in a head seek device for a disk device, wherein a head for reading and writing information on the disk is moved in a radial direction of the disk by a head drive mechanism, In a coarse seek mode of seeking to a position near a target track on the disk, when the head is moved, a control device is provided for controlling the operation of the head drive mechanism so that the head always has an acceleration. A disk head seek device is obtained.

【0009】本発明によれば,前記ディスク用ヘッドシ
ーク装置において,前記ヘッド駆動機構は印加電圧に応
じた速度で前記ヘッドを移動させるものであり,前記制
御装置は,前記粗シークモードにおいて,シーク命令が
あった時に,前記ヘッドが目標トラック近くに到達する
に要する時間を計算し,予め決められたヘッドの加速時
間と減速時間の時間配分割合によって,前記ヘッド駆動
機構への印加電圧を制御するものであることを特徴とす
るディスク用ヘッドシーク装置が得られる。
According to the present invention, in the disk head seek device, the head drive mechanism moves the head at a speed according to an applied voltage, and the control device seeks in the rough seek mode. When a command is given, the time required for the head to reach the target track is calculated, and the voltage applied to the head drive mechanism is controlled by a predetermined time distribution ratio of the acceleration time and deceleration time of the head. A disk head seek device characterized in that it can be obtained.

【0010】本発明によれば,情報を記憶するディスク
と,前記ディスクを回転させるスピンドルモータ部と,
前記ディスク上で情報の読み出し・書き込みを行うヘッ
ドと,前記ヘッドを前記ディスクの半径方向に移動させ
るヘッド駆動機構と,前記ヘッド駆動機構の動作を制御
する制御装置とを備えたディスク装置において,前記制
御装置は,前記ヘッドを前記ディスク上の目標トラック
近くまでシークさせる粗シークモードにて前記ヘッドを
移動させる際に,前記ヘッドが常に加速度を有するよう
に前記ヘッド駆動機構を制御することを特徴とするディ
スク装置が得られる。
According to the present invention, a disk for storing information, a spindle motor unit for rotating the disk,
A disk device comprising a head for reading / writing information on the disk, a head drive mechanism for moving the head in a radial direction of the disk, and a controller for controlling the operation of the head drive mechanism, The control device controls the head drive mechanism such that the head always has an acceleration when the head is moved in a coarse seek mode in which the head seeks near a target track on the disk. A disk device that can be used is obtained.

【0011】[0011]

【作用】本発明においては,予じめヘッドの加速時間と
減速時間の割合を算出することで,ヘッド駆動機構への
電圧印加を制御するために,ヘッドの等速時間を有さ
ず,従って,シーク時間を短縮することができる。
In the present invention, since the ratio of the acceleration time and the deceleration time of the head is calculated in advance to control the voltage application to the head drive mechanism, there is no constant velocity time of the head, and , The seek time can be shortened.

【0012】[0012]

【実施例】次に,本発明について図面を参照して説明す
る。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

【0013】図1は本発明の実施例に係るディスク装置
の構成を示す斜視図である。図1で示すように本発明の
実施例に係るディスク装置1は,情報を記憶するディス
ク2と,ディスク2を回転させるスピンドルモータ部3
と,回転するディスク2の面上で情報の読み出し・書き
込みを行うヘッド4と,ヘッド4の両側の貫通孔4aに
摺動自在に挿入された棒材からなりヘッド4を案内する
ガイド5と,ヘッド4の下端に設けられヘッド4をディ
スク2の半径方向6に移動させるヘッド駆動機構7と,
制御装置8とを備えている。
FIG. 1 is a perspective view showing the structure of a disk device according to an embodiment of the present invention. As shown in FIG. 1, a disk device 1 according to an embodiment of the present invention includes a disk 2 that stores information and a spindle motor unit 3 that rotates the disk 2.
A head 4 for reading and writing information on the surface of the rotating disk 2, and a guide 5 for guiding the head 4, which is made of a rod material slidably inserted into the through holes 4a on both sides of the head 4, A head drive mechanism 7 provided at the lower end of the head 4 for moving the head 4 in the radial direction 6 of the disk 2,
And a control device 8.

【0014】ヘッドシーク装置は,このディスク装置の
ディスク2と,スピンドルモータ部3とを除いた部分,
即ち,ヘッド4と,ガイド5と,ヘッド駆動機構7と,
制御装置8を備えて構成されている。ヘッド4は,制御
装置8からのヘッド駆動機構7への印加電圧の大小によ
って,移動速度が制御されている。このヘッド駆動機構
7は,リニアモータもしくはボイスコイルモータを備え
ており,制御装置8からの正及び負のステップ状の電圧
を時間的に並列させた電圧の印加によりその駆動が制御
される。
The head seek device is a part of the disk device except for the disk 2 and the spindle motor section 3,
That is, the head 4, the guide 5, the head drive mechanism 7,
The control device 8 is provided. The moving speed of the head 4 is controlled by the magnitude of the voltage applied from the control device 8 to the head drive mechanism 7. The head drive mechanism 7 includes a linear motor or a voice coil motor, and its drive is controlled by applying a voltage in which positive and negative stepwise voltages are temporally paralleled from the control device 8.

【0015】次に,本発明の実施例に係るディスク装置
のヘッドシーク装置の動作について図2をも参照して説
明する。本発明の実施例に係るディスク装置のヘッドシ
ーク装置は,図2(A)に示すように,ヘッド4が加速
領域11と減速領域12からなる三角形の速度プロフィ
ル10を描くように構成され,ヘッド4へディスク2の
目標トラックへのシーク命令があったときに,ヘッド4
が目標トラック近くに到達するに要する時間tを制御装
置8にて計算し,又制御装置8にてあらかじめ決められ
たヘッド4の加速時間t1 と減速時間t2 の時間配分割
合によってヘッド駆動機構7への電圧印加状態の制御を
行うようになっている。
Next, the operation of the head seek device of the disk device according to the embodiment of the present invention will be described with reference to FIG. As shown in FIG. 2A, the head seek device of the disk device according to the embodiment of the present invention is configured such that the head 4 draws a triangular velocity profile 10 including an acceleration region 11 and a deceleration region 12, 4 to the head 4 when there is a seek command to the target track of the disk 2.
The controller 8 calculates the time t required to reach the target track, and the head drive mechanism is calculated by the controller 8 according to a predetermined time distribution ratio of the acceleration time t 1 and the deceleration time t 2 of the head 4. The voltage application state to 7 is controlled.

【0016】図2(B)には,ディスク2の読み出し・
書き込み領域の最内周トラックから最外周トラックを目
標トラックとしてヘッド4がシークするフルストローク
シークと,ディスク2の回転数が平均回転数であるトラ
ックを目標トラックとしてヘッド4がシークする1/3
ストロークシークの場合が示してある。目標トラック近
くに到達するに要する時間すなわち粗シーク時間はそれ
ぞれt′,t″で示してあり,加速時間はそれぞれ
t′,t″,減速時間はそれぞれt2 ′,t2 ″で示し
ている。
In FIG. 2B, the reading of the disk 2
Full stroke seek in which the head 4 seeks from the innermost track to the outermost track in the writing area as a target track, and the head 4 seeks a track in which the rotation speed of the disk 2 is the average rotation speed as the target track 1/3
The case of stroke seek is shown. Each time required to reach the near target track i.e. the coarse seek time t ', "are shown in each acceleration time t t', t", respectively deceleration time t 2 ', are shown in t 2 " .

【0017】本発明の実施例の場合,ヘッド4の加速時
間t1 ′,t1 ″と減速時間t2′,t2 ″の時間配分割
合は予め決められており,t1 +t2 =t,t1 ′+t
2 ′=t′,t1 ″+t2 ″=t″,t1 /t2
1 ′/t2 ′=t1 ″/t2 ″=k(定数)として制
御するようになっている。
[0017] For embodiments of the present invention, the acceleration time of the head 4 t 1 ', t 1 "and the deceleration time t2', t 2" time allocations for is predetermined, t 1 + t 2 = t , t 1 ′ + t
2 '= t', t 1 "+ t 2" = t ", t 1 / t 2 =
Control is performed as t 1 ′ / t 2 ′ = t 1 ″ / t 2 ″ = k (constant).

【0018】このように,ヘッド駆動機構の制御方法を
実現させるために,制御装置8にてヘッド4が現在位置
するトラックから目標トラックまでの残余距離から目標
トラックまでの所要時間(例えばt,t′,t″)を計
算し,これより加速時間(t1 ,tt1 ′,t1 ″)お
よび減速時間(t2 ,t2 ′,t2 ″)を割り出し,加
速時間内はヘッド駆動機構に電圧を印加し続け,減速時
間内は印加した電圧と逆符号の電圧印加して制御を行な
うようになっている。
As described above, in order to realize the control method of the head drive mechanism, the control device 8 controls the time required from the remaining distance from the track on which the head 4 is currently located to the target track to the target track (for example, t, t). ′, T ″) is calculated, and the acceleration time (t 1 , tt 1 ′, t 1 ″) and deceleration time (t 2 , t 2 ′, t 2 ″) are calculated from this, and the head drive mechanism is set within the acceleration time. The voltage is continuously applied to the control circuit, and during the deceleration time, control is performed by applying a voltage of the opposite sign to the applied voltage.

【0019】以上説明したように,本発明の実施例に係
るディスク装置のヘッドシーク装置によると,従来例の
ようなヘッド4の移動速度が一定速度である領域がな
く,したがって図3を参照すると明らかなように,粗シ
ーク時間の短縮が可能となる。
As described above, according to the head seek device of the disk device according to the embodiment of the present invention, there is no region in which the moving speed of the head 4 is constant as in the conventional example. Therefore, referring to FIG. Obviously, it is possible to shorten the rough seek time.

【0020】[0020]

【発明の効果】以上説明したように,本発明は,ヘッド
をディスク上の目標トラック近くまでシークさせる粗シ
ークモードにおいて,全ての目標トラックへのヘッドの
移動に際して,ヘッドに常に加(減)速度がかかるよう
にヘッド駆動機構を制御することにより,ヘッドの粗シ
ーク時間を短縮できるという効果を有する。
As described above, according to the present invention, in the coarse seek mode in which the head seeks near the target track on the disk, when the head moves to all the target tracks, the acceleration (deceleration) speed is always applied to the head. By controlling the head drive mechanism in such a manner as described above, there is an effect that the rough seek time of the head can be shortened.

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

【図1】本発明の実施例に係るディスク装置の構成を示
す斜視図である。
FIG. 1 is a perspective view showing a configuration of a disk device according to an embodiment of the present invention.

【図2】図1のディスク装置のヘッドシーク装置のヘッ
ドシーク速度の制御状態をグラフ化したもので,(A)
は概略の制御状態,(B)はヘッドのフルストロークシ
ーク,1/3ストロークシークの場合の制御状態を夫々
示している。
2 is a graph showing the control state of the head seek speed of the head seek device of the disk device of FIG. 1, (A)
Shows a schematic control state, and (B) shows a control state in the case of full stroke seek and 1/3 stroke seek of the head, respectively.

【図3】本発明の実施例と従来例との比較を説明したグ
ラフである。
FIG. 3 is a graph illustrating a comparison between an example of the present invention and a conventional example.

【図4】従来例に係るヘッドシーク速度の制御状態を示
すグラフである。
FIG. 4 is a graph showing a control state of a head seek speed according to a conventional example.

【符号の説明】[Explanation of symbols]

1 ディスク装置 2 ディスク 3 スピンドルモータ 4 ヘッド 5 ガイド 7 ヘッド駆動機構 8 制御装置 1 disk device 2 disk 3 spindle motor 4 head 5 guide 7 head drive mechanism 8 controller

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 ディスク上の情報の読み出し書き込みを
行うヘッドをヘッド駆動機構によって前記ディスクの半
径方向に移動させるディスク装置用ヘッドシーク装置に
おいて,前記ヘッドを前記ディスク上の目標トラック近
くまでシークさせる粗シークモードにて,前記ヘッドを
移動させる際,前記ヘッドが常に加速度を有するように
前記ヘッド駆動機構の動作を制御する制御装置を備えた
ことを特徴とするディスク用ヘッドシーク装置。
1. A head seek device for a disk device, wherein a head for reading and writing information on the disk is moved in a radial direction of the disk by a head drive mechanism, and a rough seek for causing the head to seek near a target track on the disk. A disk head seek device comprising a control device that controls the operation of the head drive mechanism so that the head always has an acceleration when the head is moved in a seek mode.
【請求項2】 請求項1記載のディスク用ヘッドシーク
装置において,前記ヘッド駆動機構は印加電圧に応じた
速度で前記ヘッドを移動させるものであり,前記制御装
置は,前記粗シークモードにおいて,シーク命令があっ
た時に,前記ヘッドが目標トラック近くに到達するに要
する時間を計算し,予め決められたヘッドの加速時間と
減速時間の時間配分割合によって,前記ヘッド駆動機構
への印加電圧を制御するものであることを特徴とするデ
ィスク用ヘッドシーク装置。
2. The disk head seek device according to claim 1, wherein the head drive mechanism moves the head at a speed according to an applied voltage, and the control device seeks in the rough seek mode. When a command is given, the time required for the head to reach the target track is calculated, and the voltage applied to the head drive mechanism is controlled by a predetermined time distribution ratio of the acceleration time and deceleration time of the head. A disk head seek device characterized by being a thing.
【請求項3】 情報を記憶するディスクと,前記ディス
クを回転させるスピンドルモータ部と,前記ディスク上
で情報の読み出し・書き込みを行うヘッドと,前記ヘッ
ドを前記ディスクの半径方向に移動させるヘッド駆動機
構と,前記ヘッド駆動機構の動作を制御する制御装置と
を備えたディスク装置において,前記制御装置は,前記
ヘッドを前記ディスク上の目標トラック近くまでシーク
させる粗シークモードにて前記ヘッドを移動させる際
に,前記ヘッドが常に加速度を有するように前記ヘッド
駆動機構を制御することを特徴とするディスク装置。
3. A disk for storing information, a spindle motor unit for rotating the disk, a head for reading / writing information on the disk, and a head drive mechanism for moving the head in the radial direction of the disk. And a controller for controlling the operation of the head drive mechanism, wherein the controller moves the head in a coarse seek mode in which the head seeks near a target track on the disk. In addition, the disk drive, wherein the head drive mechanism is controlled so that the head always has an acceleration.
JP5171304A 1993-07-12 1993-07-12 Head seek device for disk Expired - Fee Related JP2586295B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5171304A JP2586295B2 (en) 1993-07-12 1993-07-12 Head seek device for disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5171304A JP2586295B2 (en) 1993-07-12 1993-07-12 Head seek device for disk

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JP2586295B2 JP2586295B2 (en) 1997-02-26

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12005604B2 (en) 2021-06-22 2024-06-11 Samsung E&A Co., Ltd. Nozzle of reinforcing material co-printing type 3D printer for construction

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59165277A (en) * 1983-03-09 1984-09-18 Matsushita Electric Ind Co Ltd Retrieval device of information track

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59165277A (en) * 1983-03-09 1984-09-18 Matsushita Electric Ind Co Ltd Retrieval device of information track

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12005604B2 (en) 2021-06-22 2024-06-11 Samsung E&A Co., Ltd. Nozzle of reinforcing material co-printing type 3D printer for construction

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