JPS58211368A - High-precision positioning mechanism - Google Patents

High-precision positioning mechanism

Info

Publication number
JPS58211368A
JPS58211368A JP9454182A JP9454182A JPS58211368A JP S58211368 A JPS58211368 A JP S58211368A JP 9454182 A JP9454182 A JP 9454182A JP 9454182 A JP9454182 A JP 9454182A JP S58211368 A JPS58211368 A JP S58211368A
Authority
JP
Japan
Prior art keywords
stepping motor
circuit
recording
target track
drive circuit
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
JP9454182A
Other languages
Japanese (ja)
Inventor
Satoru Yamamoto
哲 山本
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP9454182A priority Critical patent/JPS58211368A/en
Publication of JPS58211368A publication Critical patent/JPS58211368A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00Control of position or direction
    • G05D3/12Control of position or direction using feedback
    • G05D3/14Control of position or direction using feedback using an analogue comparing device

Abstract

PURPOSE:To attain the positioning with high precision without using a tracking actuator, by using a driving circuit for stepping motor for both coarse shifting and fine positioning purposes and feeding the track shift back to one of these two purpose driving circuits. CONSTITUTION:A pulse accordant with a shift extent up to a target track is fed to a stepping motor driving circuit 12 for the rough positioning. Then a linear stepping motor 15 is moved to shift a mobile base 7 up to a place near the target track. Then the circuit 12 is switched to a fine driving circuit 20 by means of a switch circuit 21. A optical head detects a shift extent of the target track and then feeds it back to the circuit 20. Thus the whole base 7 can be positioned to the target track with high precision.

Description

【発明の詳細な説明】 この発明は、円板状記録媒体の同心円状または渦巻状の
トラックに信号を記録または再生する装置の記録、再生
ヘッドの高精度位置決め機構に関するものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a highly accurate positioning mechanism for a recording/reproducing head of an apparatus for recording or reproducing signals on concentric or spiral tracks of a disc-shaped recording medium.

従来、この種の装置として第1図及び第2図に示すもの
かあ一つな。第1図において、(11は円板状記録媒体
、(2)は円板状媒体+11を取付けた回転軸、(31
は同心円状トラック、(4)は記録再生光学・\ラド、
(5)は光ビーノ1、(6)は光ビームの方向を変える
トラッキングアクチュエータ、(7)は光学ヘッド(4
1を載せて移動する移動ベース、(8)は移動ベース(
1)を媒体11+の半径方向に直線移動させるためのガ
イドレール、(91は移動ベース(7)を動かずための
送りねじ、(101は送りねじをまわすためのステッピ
ングモータである。また、第2図は第1図の位置決め機
構を動かす回路のブロック図である。この図において、
OIJは移動ベース(7)を目標トラックまで動かすの
に必要なパルスを発生するパルス発生器、uzはこのパ
ルスに対応した角度だけステッピングモータ00)を回
転させるステッピングモータ駆動回路、03)はトラッ
キングアクチュエータ(6)を動かすアクチュエータ駆
動回路、(141はステッピングモータ0(刀の駆1i
11とトラッキングアクチュエータ(6)の駆動とを切
り換える切換え回路である。
Conventionally, the only device of this type is the one shown in FIGS. 1 and 2. In FIG. 1, (11 is a disk-shaped recording medium, (2) is a rotating shaft to which a disk-shaped medium +11 is attached, (31
is a concentric track, (4) is a recording/reproducing optical system/RAD,
(5) is the optical beano 1, (6) is the tracking actuator that changes the direction of the light beam, and (7) is the optical head (4).
1 is placed on the moving base, (8) is the moving base (
1) is a guide rail for linearly moving the medium 11+ in the radial direction, (91 is a feed screw for not moving the moving base (7), and (101 is a stepping motor for turning the feed screw. Figure 2 is a block diagram of a circuit that operates the positioning mechanism of Figure 1. In this figure,
OIJ is a pulse generator that generates the pulses necessary to move the moving base (7) to the target track, uz is a stepping motor drive circuit that rotates the stepping motor 00) by an angle corresponding to this pulse, and 03) is a tracking actuator. (6) The actuator drive circuit that moves (141 is the stepping motor 0 (Katana no Kakeru 1i
11 and the driving of the tracking actuator (6).

一つぎにルJ1作について説明する。ある目標トラック
に信号を記録または再生する場合は、まず、パルス発生
器(11jに目標トラック番号が入力される。
Next, I will explain Le J1's work. When recording or reproducing a signal on a certain target track, first, the target track number is input to the pulse generator (11j).

パルス発生諸種)では、移動ベース(7)を目標トラッ
クまで動かずのに、ステッピングモータf101=54
]度回転させればよいかを引算し、それに対応したパル
ス数を発生させる。このパルスがステッピングモータ駆
動回路(1カに入力さイ15、ステッピングモータ(I
lMは言1算された角度だけ回転し、それが送りねじ(
9)で直線移動に変換されて移動ベース(7)を目標ト
ラックまで鯖かす。ところで、トラック(3)の幅は約
1μmであり、このトラック(3)に信号を記録あるい
は再生するためには、光ビーム(5)を0.1μm以下
の精度でトラック(3;に位置決めしなければならない
。ところが、ステッピングモータGGliこよる駆動で
は110μm程度の位置決めが限界である。
In the case of various types of pulse generation), even though the moving base (7) does not move to the target track, the stepping motor f101 = 54
] degrees and generates the corresponding number of pulses. This pulse is input to the stepping motor drive circuit (15) and the stepping motor (I).
lM rotates by the calculated angle, which is the feed screw (
At step 9), the movement is converted into linear movement and the movement base (7) is moved to the target track. By the way, the width of the track (3) is approximately 1 μm, and in order to record or reproduce a signal on this track (3), the light beam (5) must be positioned on the track (3) with an accuracy of 0.1 μm or less. However, the limit of positioning by the stepping motor GGli is about 110 μm.

そこで、ステッピングモータQ[lで粗い位置決めをし
た後、切り換え回路(14)でステッピングモータ駆動
回路(121をアクチュエータ駆動回路(13)に切り
換え、目標トラックとの位置す71.をトラッキングア
クチュエータ(61にフィードバックし精密な位置決め
を行って目標トラックとのすわ、を0.1μm以下にす
る。なお、目標トラックとのずれ量は光学ヘッド(4)
で検出する。
Therefore, after performing rough positioning with the stepping motor Q[l, the switching circuit (14) switches the stepping motor drive circuit (121) to the actuator drive circuit (13), and the tracking actuator (61) Feedback is performed to perform precise positioning to reduce the deviation from the target track to 0.1 μm or less.The amount of deviation from the target track is determined by the optical head (4).
Detect with.

従来の位置決め機構は、以上(こ述べたように、ステッ
ピングモータOO1とトラッキングアクチュエータ(6
)の2つのアクチュエータを使用し一〇いるため、機構
全体の価格が高くなったり、光学ヘッド(41にトラッ
キングアクチュエータ(6)ヲ取伺けなければなら7.
(いため、光学・\ラド(4)の構造が複雑になるなど
の欠点があった。
The conventional positioning mechanism consists of the stepping motor OO1 and the tracking actuator (6).
), the price of the entire mechanism becomes high, and the tracking actuator (6) must be attached to the optical head (41).
(As a result, there were drawbacks such as the optical/radical structure (4) becoming complicated.

この発明は、上記のような従来のものの欠点を除去する
ためになさイ1.たもので、ステッピングモータの駆動
回路を粗移動用と精密位置決め用の2゛つに分け、その
1つにトラックずれをフィードバックすることにより、
トラッキングアクチュエータを使用せずに精密な位置決
めができる装置を提供することを目的とする。そして、
このような目的を達成するため1こ、この発明に係る高
精度位置決め機構は、円板状記録媒体の同心円状または
渦巻状のトラックに信号を記録または再生する装置にお
いて、記録、再生ヘッドを移動させるステッピングモー
タと、前記記録、再生・\ラドの粗移動を行すうため前
記ステッピングモータを駆動する第1のステッピングモ
ータ駆動回路と、当該記録、再生ヘッドの精密位置決め
を行なうため、前記記録、再生ヘッドのトラック51’
 、!1.を前記再生ヘッドにより検出して、前記ステ
ッピングモータを駆動する第2のステッピングモータ駆
動回路と、前記第1のステッピングモータ駆動回路と前
記第2のステッピングモータ駆動回路とを択一的に駆動
させる切り換え回路とを備えている。
This invention was made in order to eliminate the drawbacks of the conventional ones as described above.1. By dividing the stepping motor drive circuit into two parts, one for coarse movement and one for precise positioning, and feeding back the track deviation to one of them,
The purpose of the present invention is to provide a device that can perform precise positioning without using a tracking actuator. and,
In order to achieve the above objects, the high-precision positioning mechanism according to the present invention moves a recording/reproducing head in an apparatus that records or reproduces signals on concentric or spiral tracks of a disc-shaped recording medium. a first stepping motor driving circuit that drives the stepping motor to perform the recording, reproducing/rad coarse movement, and a first stepping motor driving circuit that drives the stepping motor to perform the recording, reproducing/rad coarse movement; Head track 51'
,! 1. is detected by the reproducing head to selectively drive a second stepping motor drive circuit that drives the stepping motor, the first stepping motor drive circuit, and the second stepping motor drive circuit. It is equipped with a circuit.

以下、この発明の一実施例を図を用いて説明する。第6
図におい−(、+II〜+81は第1図の従来のもpと
同じである。(151は移動ベース(7)を動かすため
のリニアステッピングモータである。第4図はリニアス
テッピングモータの一例の拡大側面図で、+161は永
久研石、(17a)、(17b)  は電磁石、(18
a)、(18b)  は電磁石を励磁するコイル、(1
91は歯形板状鉄心である。第5図は第6図の位置決め
機構を動かず回路のブロック図であり、(III 。
An embodiment of the present invention will be described below with reference to the drawings. 6th
In the figure, -(, +II to +81 are the same as the conventional motor in Figure 1. (151 is a linear stepping motor for moving the moving base (7). Figure 4 shows an example of a linear stepping motor. In the enlarged side view, +161 is a permanent grinding stone, (17a) and (17b) are electromagnets, and (18
a), (18b) are the coils that excite the electromagnet, (1
91 is a toothed plate core. FIG. 5 is a block diagram of a circuit that does not move the positioning mechanism of FIG. 6 (III.

ua 、 t7+は第2図の従来のものと同じである。ua and t7+ are the same as the conventional one shown in FIG.

(2Otはリニアステッピングモータ住9を1ステップ
区間で微小移動させる微小駆動回路、(21)  は微
小駆動り普通のステップ駆動上を切り換える切り換え回
路である。
(2Ot is a minute drive circuit that minutely moves the linear stepping motor 9 in one step section, and (21) is a switching circuit that switches between minute drive and normal step drive.

つぎに、こび)gl14作を説明する。粗い位置決めに
関し−Cは、従来のものと同様に、ステッピングモータ
駆即1回路+12に目標トラックまでの移動州に合った
パルスを人カシ、リニアステッピングモータ05)を動
かし、移動ベース(l)を目標トラック近傍まで移動さ
せる。その餞、切り換え回路(21)でステッピングモ
ータ駆動回路(121から微小駆動回路(20)へ回路
を切り換え、光学・\ラド(41により目標トラックと
のずれ量f横1)してそれを微小駆動回路四にフィード
バックし、移動ベース(7)全体全精密に目標トラック
に位置決めする。なお、リニアステソピングモータ(1
5)は、ステッピングモータ駆動回路(1カで駆動する
ときは電磁石u7)の四つの歯の内のどitか一つと歯
形板状鉄心(E!1の歯が対向する位置で止まるが、微
小駆動回路(20)を用いれば、コイル(l榎に光イア
、る1d流を連続的に変化させることができ、電1a石
11歯形板状鉄心(1→の歯がず才1.た状態で止める
ことができる。
Next, I will explain the GL14 work. Regarding coarse positioning, -C, like the conventional one, sends pulses to the stepping motor drive circuit 1+12 that match the movement state to the target track, moves the linear stepping motor 05), and moves the moving base (l). Move to near the target track. Then, the switching circuit (21) switches the circuit from the stepping motor drive circuit (121) to the micro drive circuit (20), and micro-drives it by optical/\rad (41 indicates the deviation from the target track f horizontally 1). Feedback is sent to circuit 4, and the entire moving base (7) is precisely positioned on the target track.In addition, the linear stethoping motor (1
5) stops at a position where one of the four teeth of the stepping motor drive circuit (electromagnet U7 when driven by one motor) and the teeth of the toothed plate iron core (E!1) face each other, but the micro drive By using the circuit (20), it is possible to continuously change the 1d current flowing into the coil (1), and when the 11-tooth plate iron core (1 → It can be stopped.

また、上記実Mb1例では光’7′式ディスク装置に一
つい”C説明したが、フレキシブルIjjl気ディスク
装置やハード自伝ディスク装置d1光磁気ディスク装置
等であっても上11L1実施例と同様の効果を奏4−る
In addition, in the above actual Mb1 example, it was explained that it is one of the optical '7' type disk devices, but even if it is a flexible Ijjl disk device, a hard autobiography disk device, a d1 magneto-optical disk device, etc., the same as in the above 11L1 embodiment It is effective.

以十のよう遥こ、この発明により、ば、トランキングf
クチュ、L−夕などの特別なアクチュエータを用い![
(−(も、ステラピンクモー21台だv−Jで粗移動、
!l精密位置決めとができるにめ、装置全体σ2価格が
安く、佃頼件の高い位置決め機構が得られる効果がある
According to this invention, trunking f
Using special actuators such as Kuchu and L-Yu! [
(-(Also, there are 21 Stella Pink Mos. Rough movement with V-J.
! Since precise positioning is possible, the cost of the entire device σ2 is low, and a highly reliable positioning mechanism can be obtained.

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

第1図は従来のもン閥、決め機構、第2図は従来の位ハ
勤゛決め機構駆動回路のブロック図、第6図はこの発明
の一実施例番こよる位置決め機構、第4図はリニアステ
ッピングモータの一例の側面図、925図はこの発明の
一実施例による位置決め機構駆動回路のブロック図であ
る。 m・・・円板状記録媒体、(2)・・・回転軸、(3)
・・・同心円状トランク、(、i+・・・記録再生用光
学ヘッド、(5)・・・光ビーム、(6)・・・トラッ
キングアクチュエータ、(7)・・・移動ベース、(8
1・・・ガイドレール、(9)・・・送りねじ、(1t
Jl・・・ステツビンクモータ、+I11・・・パルス
発生g:’、 、++21°°°ステッピング壬−タ駆
動回モータ3)・・・トラ二ノキングアクチュエータ駆
動回路、[141・・・切り換え回路、(15)・・・
リニアステソビンダモータ、(IC,)・・・永久(1
替石、u71・・・電(心石、flit)・・・コイル
、09)・・・歯形板状鉄心、L20+・・・ステッピ
ングモータ微小駆動回路;  (21)・・・切り換え
回路。 なお、図中、同一符号は同一または相当部分を示す。 代理人   葛 野 信 −
Fig. 1 shows a conventional positioning mechanism, Fig. 2 is a block diagram of a conventional positioning mechanism drive circuit, Fig. 6 shows a positioning mechanism according to an embodiment of the present invention, Fig. 4 925 is a side view of an example of a linear stepping motor, and FIG. 925 is a block diagram of a positioning mechanism drive circuit according to an embodiment of the present invention. m... Disk-shaped recording medium, (2)... Rotating shaft, (3)
... Concentric trunk, (,i+... Optical head for recording/reproduction, (5)... Light beam, (6)... Tracking actuator, (7)... Moving base, (8
1...Guide rail, (9)...Feed screw, (1t
Jl...Stepping motor, +I11...Pulse generation g:', , ++21°°°Stepping motor drive motor 3)...Tranino king actuator drive circuit, [141...Switching circuit, (15)...
Linear stethobinder motor, (IC,)...Permanent (1
Spare stone, u71...Electric (center stone, flit)...Coil, 09)...Toothed plate iron core, L20+...Stepping motor minute drive circuit; (21)...Switching circuit. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. Agent Shin Kuzuno −

Claims (1)

【特許請求の範囲】[Claims] 円板状記録媒体の同心円状または渦巻状のトラックに信
号を記録または再生する装置において、記録、再生ヘッ
ドを移動させるステッピングモータと、前記記録、再生
ヘッドの粗移動を行なうため前記ステッピングモータを
駆動する第1のステッピングモータ駆動回路と、当該配
録、再生・\ラドの精密位置決めを行なうため、前記記
録、再生ヘッドのトラックずれを前記再生ヘッドにより
検出して前記ステッピングモータを駆動する第2のステ
ッピングモータ駆動回路と、前記第1のステッピングモ
ータ駆動回路と前記第2のステッピングモータ駆動回路
とを択一的に駆動させる切り換え回路とを備えたことを
%徴とする高精度位置決め機構。
An apparatus for recording or reproducing signals on concentric or spiral tracks of a disk-shaped recording medium includes a stepping motor that moves a recording/reproducing head, and a stepping motor that drives the stepping motor to coarsely move the recording/reproducing head. a first stepping motor driving circuit that detects a track deviation of the recording and reproducing head by the reproducing head to perform precise positioning of the recording, reproducing and \RAD, and a second stepping motor driving circuit that drives the stepping motor by detecting the track deviation of the recording and reproducing head by the reproducing head. A high-precision positioning mechanism comprising: a stepping motor drive circuit; and a switching circuit that selectively drives the first stepping motor drive circuit and the second stepping motor drive circuit.
JP9454182A 1982-06-02 1982-06-02 High-precision positioning mechanism Pending JPS58211368A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9454182A JPS58211368A (en) 1982-06-02 1982-06-02 High-precision positioning mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9454182A JPS58211368A (en) 1982-06-02 1982-06-02 High-precision positioning mechanism

Publications (1)

Publication Number Publication Date
JPS58211368A true JPS58211368A (en) 1983-12-08

Family

ID=14113172

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9454182A Pending JPS58211368A (en) 1982-06-02 1982-06-02 High-precision positioning mechanism

Country Status (1)

Country Link
JP (1) JPS58211368A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02273810A (en) * 1989-03-07 1990-11-08 Internatl Business Mach Corp <Ibm> Positioning controller and positioning method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5010113A (en) * 1973-05-24 1975-02-01
JPS5171111A (en) * 1974-12-18 1976-06-19 Fujitsu Ltd ICHIZUREHOSEIHOSHIKI
JPS57186267A (en) * 1981-05-11 1982-11-16 Matsushita Electric Ind Co Ltd Device for positioning head
JPS5835770A (en) * 1981-08-24 1983-03-02 Hitachi Ltd Magnetic disc device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5010113A (en) * 1973-05-24 1975-02-01
JPS5171111A (en) * 1974-12-18 1976-06-19 Fujitsu Ltd ICHIZUREHOSEIHOSHIKI
JPS57186267A (en) * 1981-05-11 1982-11-16 Matsushita Electric Ind Co Ltd Device for positioning head
JPS5835770A (en) * 1981-08-24 1983-03-02 Hitachi Ltd Magnetic disc device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02273810A (en) * 1989-03-07 1990-11-08 Internatl Business Mach Corp <Ibm> Positioning controller and positioning method

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