JPS6236725A - Control device for height of magnetic head - Google Patents

Control device for height of magnetic head

Info

Publication number
JPS6236725A
JPS6236725A JP17585485A JP17585485A JPS6236725A JP S6236725 A JPS6236725 A JP S6236725A JP 17585485 A JP17585485 A JP 17585485A JP 17585485 A JP17585485 A JP 17585485A JP S6236725 A JPS6236725 A JP S6236725A
Authority
JP
Japan
Prior art keywords
magnetic head
screw
head
height
adjustment
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
JP17585485A
Other languages
Japanese (ja)
Other versions
JPH0519764B2 (en
Inventor
Masaichi Baba
馬場 政一
Hitoshi Odajima
均 小田島
Yoshitaka Tsutsui
義隆 筒井
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP17585485A priority Critical patent/JPS6236725A/en
Publication of JPS6236725A publication Critical patent/JPS6236725A/en
Publication of JPH0519764B2 publication Critical patent/JPH0519764B2/ja
Granted legal-status Critical Current

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

Abstract

PURPOSE:To produce the cylinders for reproduction having the uniform quality with low cost by pressing an adjusting screw to a head base, and bending the head base to attain the automatic control of the height of a magnetic head. CONSTITUTION:When a cylinder 1 is set onto a rotary table 9 with a chuck 10, a mobile base 16 moves down. Then a hexagonal ball 28 of a control driver 24 is revolved when a pulse motor 19 is revolved continuously. The driver 24 moves down by the force of a spring 26 when the ball 28 has the same phase as a hexagonal hole 29 of the adjusting screw 8. Thus the ball 28 is fitted into the hole 29. Under such conditions, a noncontact displacement gauge 34 stores the gap width against a detecting plate 33. The screw 8 has a contact with a head base 2 when the motor 19 continues its revolutions. Then the base 2 moves down and therefore a lever 30 has oscillations. Thus the gap width between the gauge 34 and the plate 33 is reduced. A microprocessor 37 compares the data on the height of two magnetic heads 3 which are through with rough adjustments with each other and calculates the rotational quantity of the screw 8 from the screw pitch.

Description

【発明の詳細な説明】 (発明の利用分野) 本発明はVTRなどに使用されるシリンダの外周端部対
向位置に組付けられたヘッドベースに先端部が上記シリ
ンダの外周面より突出する如く貼り付けられた磁気ヘッ
ドの高さを調整する磁気ヘッド高さ位置調整装置とくに
自動化に好適な磁気ヘッド高さ位置調整装置に関するも
のである。
DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention relates to a head base assembled to a position facing the outer peripheral end of a cylinder used in a VTR, etc. so that the tip thereof protrudes from the outer peripheral surface of the cylinder. The present invention relates to a magnetic head height position adjusting device for adjusting the height of an attached magnetic head, and particularly to a magnetic head height position adjusting device suitable for automation.

(発明の背景) 従来よF) VTRに使用されている磁気記録用のシリ
ンダは第5図に示す如くシリンダ1の外周端部対向位置
に2個のへラドベース2を組付けこれら各ヘッドベース
2に先端部が上記シリンダ1の外周面よシ外方に突出す
る如く磁気へラド3を組付けたものが実施されている。
(Background of the Invention) Conventionally, as shown in FIG. 5, a magnetic recording cylinder used in a VTR has two head bases 2 mounted at opposing positions on the outer peripheral end of a cylinder 1, and each of these head bases 2 A magnetic head 3 is assembled in such a way that its tip protrudes outward from the outer peripheral surface of the cylinder 1.

また。Also.

磁気テープ上の記録を正しく再生するためには第6図に
示す如く、上記複数個の磁気ヘッド6の高さεを数ミク
ロン以内に調整する必要がある。そこで従来はたとえば
特開昭57−98131号公報に記載され、かつ第7図
に示す如く、両面に電極を有する2枚の圧電素子6α、
6bをバイモルフ状に貼シ合せた振動子6の一端部をシ
リンダ1に固定し、他端部に磁気ヘッド3を固定したも
ので、上記2枚の圧電素子6α、6Aの電極間に電圧E
を印加することにより、上記磁気ヘッド3の先端が矢印
方向に変位させるようにしたものが発明されている。然
るに上記の方法は圧電素子6α、6bを使用しているた
め、製品価格が高価になる欠点を有する。
In order to correctly reproduce the recording on the magnetic tape, it is necessary to adjust the height ε of the plurality of magnetic heads 6 to within several microns, as shown in FIG. Therefore, conventionally, as described in, for example, Japanese Unexamined Patent Publication No. 57-98131, and as shown in FIG. 7, two piezoelectric elements 6α having electrodes on both sides,
One end of the vibrator 6 is fixed to the cylinder 1, and the magnetic head 3 is fixed to the other end, and a voltage E is generated between the electrodes of the two piezoelectric elements 6α and 6A.
A device has been invented in which the tip of the magnetic head 3 is displaced in the direction of the arrow by applying the above. However, since the above method uses piezoelectric elements 6α and 6b, it has the disadvantage that the product price is high.

そこで従来よシ第8図および第9図に示す如く、シリン
ダ1の外周端部に止メネジ7にて真しゆうなどで形成さ
れた2個のへラドベース2を締着し、これら各ヘッドベ
ース2に先端部が上記シリンダ1の外周面よシ突出する
如く磁気ヘッド5を貼シ付けかつ上記シリンダ1の上記
磁気ヘッド3の背面に相当する位置にネジ穴1αを形成
し、このネジ穴1.に調整ネジ8を螺着したものが実施
されている。この場合には調整ネジ8を回動しつ\軸方
向に移動させてその上端部で磁気ヘッド3の先端部の高
さ方向を調整するものである。つぎにその調整方法の一
例について第10図により説明する。同図に示す如く、
正確に1800割出しを行なうことが可能な回転テーブ
ル9に磁気ヘッド5が下方になるようにシリンダ1を嵌
挿し、上面をチャック10にて固定している。この状態
で上記磁気ヘッド3の先端を水平方向にTV左カメラ1
で撮影し、その画像を拡大してTV12に写し出したの
ち、TV12に備え付けられたカーソル線13を合せて
磁気ヘッド3の高さを読み出す。ついで上記回転テーブ
ル9を1800回転して上記と同一の方法によυ他方の
磁気ヘッド5の高さを読み出す。このとき両磁気ヘッド
5の間に差がある場合には、低い方の調整ネジ8を調整
具14により回動しつつ軸方向に移動させて両磁気ヘッ
ド3の高さの差に相当する量だけ調整する方法が実施さ
れている。
Therefore, conventionally, as shown in FIGS. 8 and 9, two helad bases 2 formed with a screw or the like are fastened to the outer peripheral end of the cylinder 1 with a set screw 7, and each of these head bases is A magnetic head 5 is attached to the cylinder 1 so that its tip protrudes beyond the outer peripheral surface of the cylinder 1, and a screw hole 1α is formed in the cylinder 1 at a position corresponding to the back surface of the magnetic head 3. .. An adjustment screw 8 is screwed onto the holder. In this case, the adjustment screw 8 is rotated and moved in the axial direction to adjust the height direction of the tip of the magnetic head 3 using its upper end. Next, an example of the adjustment method will be explained with reference to FIG. 10. As shown in the figure,
The cylinder 1 is fitted onto a rotary table 9 capable of performing accurate 1800 indexing with the magnetic head 5 facing downward, and the upper surface is fixed with a chuck 10. In this state, move the tip of the magnetic head 3 horizontally to the TV left camera 1.
After the image is enlarged and displayed on the TV 12, the height of the magnetic head 3 is read out by aligning the cursor line 13 provided on the TV 12. Next, the rotary table 9 is rotated 1800 times, and the height of the other magnetic head 5 is read out in the same manner as described above. At this time, if there is a difference between the two magnetic heads 5, the lower adjustment screw 8 is rotated by the adjustment tool 14 and moved in the axial direction by an amount corresponding to the difference in height between the two magnetic heads 3. A method of adjusting only has been implemented.

この方法の場合には圧電素子を使用するものと比較して
製品価格が低下するが、その反面、調整作業を自動化す
るには、つぎに述べる如き問題がある。
In this method, the product price is lower than that using piezoelectric elements, but on the other hand, there are problems in automating the adjustment work as described below.

(1)すなわち、第1の理由は、シリンダ1に形成され
たネジ穴1αの位置がシリンダ1によって若干具なるた
め、調整具14の位置を上記ネジ穴1αに合わせる必要
がある。
(1) That is, the first reason is that the position of the screw hole 1α formed in the cylinder 1 varies slightly depending on the cylinder 1, so it is necessary to align the position of the adjusting tool 14 with the screw hole 1α.

(11)第2の理由は、前記の如く、磁気ヘッド3の高
さεを数ミクロン以内に調整する必要があるが、これを
調整ネジ8にて行なうと、ヘッドベース2のたわみ量が
少なすぎる場合には、ヘッドベース2が僅少な外力によ
り必要以上にたわみを発生するため、調整が困難である
。またへラドベース2のたわみ量が大きすぎる場合には
、磁気ヘッド3が斜方向に傾斜するため、磁気ヘッド3
の先端部と磁気テープとの接触状態が変化して再生機能
が低下する。
(11) The second reason is that, as mentioned above, it is necessary to adjust the height ε of the magnetic head 3 to within a few microns, but if this is done using the adjustment screw 8, the amount of deflection of the head base 2 is small. If it is too large, the head base 2 will deflect more than necessary due to a slight external force, making adjustment difficult. Furthermore, if the amount of deflection of the helad base 2 is too large, the magnetic head 3 will tilt in an oblique direction.
The state of contact between the leading end of the magnetic tape and the magnetic tape changes, and the playback function deteriorates.

010  第3の理由は、調整に長い時間を要すること
である。すなわち、調整ネジ8を回動しても、その先端
部がヘッドベース2に接触するまでは磁気ヘッド3の先
端部位置が変化しないため、その間遊びの時間になる。
[010] The third reason is that adjustment takes a long time. That is, even if the adjustment screw 8 is rotated, the position of the tip of the magnetic head 3 does not change until the tip comes into contact with the head base 2, so there is a period of play during that time.

また磁気ヘッド3の高さを調整するのに重要なことは調
整ネジ8の先端部がヘッドベース2に接触後、僅少づつ
回動して調整することである。
What is important in adjusting the height of the magnetic head 3 is that after the tip of the adjustment screw 8 comes into contact with the head base 2, the adjustment is made by rotating it little by little.

これを作業者が行なう場合には、TV12の画像をみて
瞬時に磁気ヘッド3の高さの調整量を判断し、その結果
に基いて調整ネジ8を僅少づつ回動して調整しなければ
ならないため作業者に与える精神的な負担が増加し【容
易に行なうことができず、かつ調整ネジ8の先端部がヘ
ッドベース2に接触したか否かをTV 12によフ何回
も繰返し行なう必要があるため、多くの時間を要するこ
とKなる。さらにこれを自動的に行なう場合には、磁気
ヘッド6の高さ位置を検出するのに多くの時間を要する
ことになる。
If this is to be done by an operator, he or she must instantly determine the adjustment amount of the height of the magnetic head 3 by looking at the image on the TV 12, and then adjust the height by turning the adjustment screw 8 little by little based on the result. Therefore, the mental burden on the worker increases. [This is not easy to do, and it is necessary to repeatedly check using the TV 12 whether or not the tip of the adjustment screw 8 has contacted the head base 2.] Therefore, it takes a lot of time. Furthermore, if this is done automatically, it will take a lot of time to detect the height position of the magnetic head 6.

上記の問題点を解決するためには、磁気ヘッド3の高さ
位置を高精度でかつ高速度で検出する手段を必要とする
が、現在のところ、これに適応した手段は見当らない。
In order to solve the above problems, a means for detecting the height position of the magnetic head 3 with high precision and high speed is required, but at present, no means suitable for this has been found.

(発明の目的) 本発明は前記従来の問題点を解決し、自動化を可能にし
均質かつ安価な再生用シリンダの生産を可能とする磁気
ヘッド高さ位置調整装置を提供することにある。
(Objects of the Invention) An object of the present invention is to provide a magnetic head height position adjustment device that solves the above-mentioned conventional problems, enables automation, and enables production of homogeneous and inexpensive reproduction cylinders.

(発明の概要) 本発明は前記の目的を達成するため、調整ネジの位置の
バラツキを吸収するコンプライアンス機構を有する調整
ドライバ駆動部と、調整ネジがヘッドベースに接触した
ことを検出するヘッドベース挙動検出部と、調整ドライ
バ先端が調整ネジ頭部の穴に嵌合したことを検出するネ
ジ嵌合検出部と磁気ヘッドの位置を測定するカメラおよ
び画像処理ユニットを設けたことを特徴とするものであ
る。
(Summary of the Invention) In order to achieve the above object, the present invention provides an adjustment driver drive unit having a compliance mechanism that absorbs variations in the position of an adjustment screw, and a head base behavior that detects when the adjustment screw contacts the head base. The device is characterized by being equipped with a detection unit, a screw fitting detection unit that detects that the tip of the adjustment driver is fitted into the hole of the adjustment screw head, a camera that measures the position of the magnetic head, and an image processing unit. be.

(発明の実施例) 以下、本発明の実施例を示す第1図乃至第4図について
説明する。
(Embodiments of the Invention) Hereinafter, FIGS. 1 to 4 showing embodiments of the present invention will be described.

第1図においてシリンダ15は移動ペース16をスライ
ド部17の案内によ如上下させる。軸18はパルスモー
タ19とカップリング20で結合されていると同時にボ
ールベアリング21α、21bによって、動ペース16
に保持されている。軸18の下部には六角穴22が設け
られてお9、軸25の端部の六角ボール27がハメ合っ
ている。軸23はボールベアリング21cで保持され、
ボールベアリング21cはゴム21dを介して移動ペー
ス16に保持されている。従って軸23は軸18から回
製力は伝達されるが、ラジアル方向にはコンプライアン
スを有する。軸25の下部にはスプライン穴25αが設
けられており、調整ドライバ24の頭部のスプライン軸
25とハメ合っている。調整ドライバ24はスプリング
26によって下方に押し下げられる力を受けている。調
整ドライバ24の下部には六角ボール28が設けられて
おり、磁気ヘッド高さ調整ネジ80頭部の六角穴29と
ハメ合い、調整を行なう。またシリンダ1には前記第8
図に示すように、ヘッドベース20周辺に磁気ヘッド位
置の平面内調整のために用いる貫通穴1αが設けられて
いる。第1図においてレバー30の一端部30αは下方
直角方向に折シ曲げられ、その先端部をシリンダ10貫
通穴1α内を通ってヘッドベース2に接触している。レ
バー30は支点31を中心にして揺動し、スプリング5
2によってヘッドベース2への押付力を付けられている
。レバー30の他端30Aには検出板33が固定されて
おシ、非接触変位計34は検出板33とのギャップの巾
を測定する。
In FIG. 1, the cylinder 15 moves the moving pace 16 up and down as guided by the slide section 17. The shaft 18 is connected to a pulse motor 19 by a coupling 20, and at the same time, the moving pace 16 is connected to the pulse motor 19 by ball bearings 21α and 21b.
is maintained. A hexagonal hole 22 is provided in the lower part of the shaft 18, into which a hexagonal ball 27 at the end of the shaft 25 is fitted. The shaft 23 is held by a ball bearing 21c,
The ball bearing 21c is held on the moving pace 16 via rubber 21d. Therefore, although the regenerative force is transmitted to the shaft 23 from the shaft 18, it has compliance in the radial direction. A spline hole 25α is provided in the lower part of the shaft 25, and fits with the spline shaft 25 on the head of the adjustment driver 24. The adjustment driver 24 receives a downward force from a spring 26. A hexagonal ball 28 is provided at the bottom of the adjustment driver 24, and is fitted into a hexagonal hole 29 at the head of the magnetic head height adjustment screw 80 to perform adjustment. In addition, the cylinder 1 has the eighth
As shown in the figure, a through hole 1α is provided around the head base 20 to be used for in-plane adjustment of the position of the magnetic head. In FIG. 1, one end 30α of the lever 30 is bent in a downward right angle direction, and its tip passes through the through hole 1α of the cylinder 10 and contacts the head base 2. The lever 30 swings around a fulcrum 31, and the spring 5
2 applies a pressing force to the head base 2. A detection plate 33 is fixed to the other end 30A of the lever 30, and a non-contact displacement meter 34 measures the width of the gap with the detection plate 33.

かかる構成により、ヘッドベース2が下方に移動すると
、検出板33と非接触変位計34とのギヤツブ巾が変化
するので、非接触変位計34はヘッドベース2が下方へ
移動したことを検出できろ。また調整ドライバ24には
凸部55が設けられており、調整ドライバ24がスプリ
ング26に押され、調整ネジ8の六角穴29にはめあっ
て下降したことを反射形光型スイッチ36が検出する。
With this configuration, when the head base 2 moves downward, the gear width between the detection plate 33 and the non-contact displacement meter 34 changes, so the non-contact displacement meter 34 can detect that the head base 2 has moved downward. . Further, the adjusting driver 24 is provided with a convex portion 55, and the reflective optical switch 36 detects that the adjusting driver 24 is pushed by the spring 26, fits into the hexagonal hole 29 of the adjusting screw 8, and descends.

回転テーブル9はシリンダ1をチャック10によって保
持し、1800回転割出を行なう。また磁気ヘッド3の
先端位置はTV右カメラ1によりて写される。
The rotary table 9 holds the cylinder 1 with a chuck 10 and performs indexing of 1800 revolutions. Further, the position of the tip of the magnetic head 3 is photographed by the TV right camera 1.

制御構成を第2図に示す。マイクロプロセッサ57はモ
ータ駆動回路38にパルスモータ19の駆動量を指令す
る。また画像処理回路39はTV右カメラ1からの画像
を処理し、磁気ヘッド5の高さをマイクロプロセッサ3
7に送る。非接触変位計54からの信号は後に詳説する
信号処理回路40で処理され、ヘッドベース2が移動を
開始したか否かの信号として、マイクロプロセッサ67
に送られる。また、調整ドライバ24が調整ネジ8には
め合りたか否かを検出する反射形光型スイッチ41の出
力もマイクロプロセッサS7に送られる。さらにマイク
ロプロセッサ37は回転テーブル9を駆動するモータ(
図示せず)に駆動指令を送る。
The control configuration is shown in Figure 2. The microprocessor 57 instructs the motor drive circuit 38 to drive the pulse motor 19 . Further, the image processing circuit 39 processes the image from the TV right camera 1 and determines the height of the magnetic head 5 by the microprocessor 3.
Send to 7. The signal from the non-contact displacement meter 54 is processed by a signal processing circuit 40, which will be explained in detail later, and is processed by the microprocessor 67 as a signal indicating whether or not the head base 2 has started moving.
sent to. Further, the output of the reflective optical switch 41, which detects whether or not the adjustment driver 24 is fitted into the adjustment screw 8, is also sent to the microprocessor S7. Furthermore, the microprocessor 37 controls a motor (
(not shown).

かかる構成によp、シリンダ1が回転テーブル9上にチ
ャック10によってセットされると移動ペース16が下
降する。次にパルスモータ19を連続回転させると、調
整ドライバ24の六角ボール28が回転し、調整ネジ8
の六角穴29と同位相になるとスプリング26の力によ
って調整ドライバ24が下降し、六角ボール28と六角
穴29とがはめ合う。この時の状態は第5図の(イ)の
ようになっている。この状態で、非接触変位計34は検
出板33との間のギヤツブ巾を記憶する。パルスモータ
9の回転を続けると、調整ネジ8はへラドペース2に接
触し、第3図(ハ)、第3図(ロ)の状態になる。その
後ヘツドベース2は下降を始めそれにつれてレバー30
は揺動し、非接触変位計34と検出板33との間のギヤ
ツブ巾は小さくなっていく。(第3図に)参照)この間
の非接触変位計34の出力の様子を第4図に示す。第2
図の信号処理回路40は、非接触変位計34の出力が、
第3図(イ)の状態で記憶した値に対して所定量だけ変
化した時に検出信号をマイクロプロセッサ37ニ送る。
With this configuration, when the cylinder 1 is set on the rotary table 9 by the chuck 10, the moving pace 16 is lowered. Next, when the pulse motor 19 is continuously rotated, the hexagonal ball 28 of the adjustment driver 24 rotates, and the adjustment screw 8
When the hexagonal hole 29 is in the same phase as the hexagonal hole 29, the adjusting driver 24 is lowered by the force of the spring 26, and the hexagonal ball 28 and the hexagonal hole 29 are fitted together. The state at this time is as shown in FIG. 5 (a). In this state, the non-contact displacement meter 34 memorizes the gear tooth width between it and the detection plate 33. As the pulse motor 9 continues to rotate, the adjustment screw 8 comes into contact with the herad pace 2, resulting in the states shown in FIGS. 3(C) and 3(B). After that, the head base 2 starts to descend, and as it does so, the lever 30
swings, and the gear tooth width between the non-contact displacement meter 34 and the detection plate 33 becomes smaller. (See FIG. 3)) FIG. 4 shows the output of the non-contact displacement meter 34 during this period. Second
The signal processing circuit 40 shown in the figure is configured such that the output of the non-contact displacement meter 34 is
A detection signal is sent to the microprocessor 37 when the value changed by a predetermined amount from the value stored in the state shown in FIG. 3(a).

マイクロプロセッサ57は上記信号を受は取ると同時に
パルス七−夕19の回転指令を中止すると共に、その時
のパルスモータ19の回転位相を記憶する。またマイク
ロプロセッサ57は反射形光室スイッチ41の出力によ
り調整ネジ8が六角穴29に嵌合していることを確認す
る。さらにマイクロプロセッサ37は画像処理回路39
に指令を与え、磁気ヘッド3の高さを測定させ、データ
を読み込む。以上の方法により一方の磁気ヘッド5を初
期量だけ変化させ、粗調整を終了する。
At the same time as the microprocessor 57 receives the above-mentioned signal, it stops the rotation command of the pulse Tanabata 19 and stores the rotation phase of the pulse motor 19 at that time. The microprocessor 57 also confirms that the adjustment screw 8 is fitted into the hexagonal hole 29 based on the output of the reflective light chamber switch 41. Furthermore, the microprocessor 37 is an image processing circuit 39
A command is given to the magnetic head 3 to measure the height of the magnetic head 3 and read the data. By the above method, one of the magnetic heads 5 is changed by the initial amount, and the coarse adjustment is completed.

次に移動ペース16を上昇させた後に回転テーブル9を
回転させ、もう一方の磁気ヘッド3の粗調整を終了する
Next, after increasing the moving pace 16, the rotary table 9 is rotated, and the rough adjustment of the other magnetic head 3 is completed.

マイクロプロセッサ67は粗調整を終了した2つの磁気
へノド3の高さのデータを比較し、高い方の磁気ヘッド
5を他方、すなわち低い方の磁気ヘッド3の高さに合わ
せるための調整量に対応する調整ネジ80回転量をその
ネジピッチにより計算する。
The microprocessor 67 compares the data of the heights of the two magnetic nozzles 3 for which the rough adjustment has been completed, and determines the amount of adjustment for adjusting the height of the higher magnetic head 5 to the height of the other, that is, the lower magnetic head 3. The amount of rotation of the corresponding adjustment screw 80 is calculated based on the screw pitch.

回転テーブル9の回転により、高い方の磁気ヘッド3を
調整ユニットの下に位置させ、また先に記憶した回転位
相までパルスモータ19を回転させた後に、移動ベース
16を下降する。この後、先に計算した回転量だけ、調
整ネジ8を調整ドライバ24で回転し、TV左カメラと
画像処理回路39によυ磁気ヘッド3が目標値に移動し
たことを確認して微調整を終了し、移動ユニット16を
上昇させて全動作を完了する。
By rotating the rotary table 9, the higher magnetic head 3 is positioned below the adjustment unit, and after the pulse motor 19 is rotated to the previously memorized rotation phase, the movable base 16 is lowered. After this, rotate the adjustment screw 8 by the previously calculated amount of rotation using the adjustment driver 24, and make fine adjustments after confirming that the υ magnetic head 3 has moved to the target value using the TV left camera and image processing circuit 39. When finished, the mobile unit 16 is raised to complete the entire operation.

(発明の効果) 本発明によれば、調整ネジをヘッドベースに押しつけ、
たわませることにより磁気ヘッド高さを調整する方式の
欠点であった、熟練者による調整コストの問題を自動化
することにより解消でき、均質かつ安価な再生用シリン
ダの生産を可能にすることができる。
(Effect of the invention) According to the invention, the adjustment screw is pressed against the head base,
The drawback of the method of adjusting the height of the magnetic head by bending it, which was the cost of adjustment by skilled workers, can be solved by automation, making it possible to produce homogeneous and inexpensive reproduction cylinders. .

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

第1図は本発明の実施例を示す磁気ヘッド高さ位置調整
装置の断面図、第2図はその制御回路図、第3図は動作
説明図、第4図は非接触変位計の出力曲線図、第5図は
本発明が適用されるVTR用シリンダの平面図、第6図
は断面正面図、第7図は従来の磁気ヘッド高さ位置調整
装その断面正面図、第10図は従来のさらに他の磁気ヘ
ッド高さ位置調整装置を示す説明図である。
Fig. 1 is a sectional view of a magnetic head height position adjustment device showing an embodiment of the present invention, Fig. 2 is its control circuit diagram, Fig. 3 is an explanatory diagram of its operation, and Fig. 4 is an output curve of a non-contact displacement meter. 5 is a plan view of a VTR cylinder to which the present invention is applied, FIG. 6 is a sectional front view, FIG. 7 is a sectional front view of a conventional magnetic head height position adjustment device, and FIG. 10 is a conventional FIG. 7 is an explanatory diagram showing still another magnetic head height position adjustment device.

Claims (1)

【特許請求の範囲】[Claims] VTR用シリンダに止メネジにより締着されたヘッドベ
ースの先端部を上記シリンダの上記止メネジよりも外周
位置に締着された調整ネジの先端部でたわませて先端部
に固定された磁気ヘッドの高さを調整する磁気ヘッド高
さ位置調整装置において、上記調整ネジを回動させるた
めの保持部にコンプライアンスを有するドライバ駆動機
構と、調整ネジがヘッドベースに接触したことを検出す
るヘッドベース挙動検出部と、上記ドライバの先端部が
調整ネジの穴に嵌合したことを検出するネジ嵌合検出部
と、磁気ヘッドの高さ位置を測定する測定部とを設けた
ことを特徴とする磁気ヘッド高さ位置調整装置。
A magnetic head fixed to the tip of a head base that is fastened to a VTR cylinder by a set screw by bending it with the tip of an adjustment screw that is tightened at a position on the outer periphery of the above-mentioned set screw of the cylinder. A magnetic head height position adjustment device that adjusts the height of a magnetic head includes a driver drive mechanism having compliance in a holding part for rotating the adjustment screw, and a head base behavior that detects when the adjustment screw contacts the head base. A magnetic device comprising: a detection section; a screw fitting detection section for detecting that the tip of the driver is fitted into a hole of an adjustment screw; and a measurement section for measuring the height position of the magnetic head. Head height position adjustment device.
JP17585485A 1985-08-12 1985-08-12 Control device for height of magnetic head Granted JPS6236725A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17585485A JPS6236725A (en) 1985-08-12 1985-08-12 Control device for height of magnetic head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17585485A JPS6236725A (en) 1985-08-12 1985-08-12 Control device for height of magnetic head

Publications (2)

Publication Number Publication Date
JPS6236725A true JPS6236725A (en) 1987-02-17
JPH0519764B2 JPH0519764B2 (en) 1993-03-17

Family

ID=16003360

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17585485A Granted JPS6236725A (en) 1985-08-12 1985-08-12 Control device for height of magnetic head

Country Status (1)

Country Link
JP (1) JPS6236725A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0562140A (en) * 1991-09-02 1993-03-12 Matsushita Electric Ind Co Ltd Device for positioning magnetic head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0562140A (en) * 1991-09-02 1993-03-12 Matsushita Electric Ind Co Ltd Device for positioning magnetic head

Also Published As

Publication number Publication date
JPH0519764B2 (en) 1993-03-17

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