JPH06168432A - Method and device for adjusting magnetic head position - Google Patents

Abstract

PURPOSE:To enhance the accuracy in the position adjustment between a tape guide and a magnetic head by providing a reference marker for alignment on a magnetic head and measuring the distance between an actually traveling tape edge and this reference marker by image measurement. CONSTITUTION:The magnetic head 3 is provided in the tape 2 traveling route of a tape guide 1 for allowing the tape 2 to travel. The reference marker is provided on the head 3. The reference marker and the tape edge are observed by an enlarging optical system, such as microscope 4 and the distance therebetween is automatically measured by the image measurement. The position is then adjusted. The reference marker is aligned to the traveling tape edge in such a manner, by which the position adjustment of the tape guide and the magnetic head with the high accuracy is executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head position adjusting method and apparatus, and more particularly, to a highly accurate magnetic head position adjusting method and apparatus for a magnetic head tape guide.

[0002]

2. Description of the Related Art As a known technique for describing the prior art according to the present invention, there is, for example, "Head Positioning Control Device" of Japanese Patent Laid-Open No. 3-46115. In this publication, the accuracy of the reference position in head positioning is improved,
In order to improve compatibility between magnetic tape devices, the center of the write head and the center of the track of the read head can be easily aligned with each other.

With the increase in the number of tracks and the miniaturization of the track pitch accompanying the digitization of magnetic heads such as DCC and DMR, there is a demand for a micrometer-precision alignment technique in the assembling accuracy between the magnetic head and the guide. . Particularly, the distance adjustment of the track position on the chip with respect to the tape guide is an important adjustment item that guarantees the compatibility between the decks which are the final products. Conventionally, as an adjustment technique for performing this distance adjustment, an adjustment method by tape reproduction has been developed.

3 and 4 are views showing a conventional magnetic head, FIG. 3 is a view showing a tape reproduction state in a tape reproduction system, and FIG. 4 is a view showing a relationship between a track and a tape recording portion. FIG. 5 is an output signal diagram in the tape reproducing system. In the figure, 10 is a magnetic head, 11 is a tape guide,
12 is a tape, 13 is Rch, 14 is Lch, 15 is a digital head unit, and 16 is an analog head unit.

In FIG. 3, a magnetic head 10 is provided in the running path of the tape 12 of a tape guide 11 for running the tape 12. As shown in FIG.
A 1 KHz signal is recorded on Rch 13 and Lch 14 of the analog tape 12. When the analog tape 12 is along the track, the reproduction signals of both Lch 13 and Rch 14 have the maximum output, and the output levels are the same. Therefore, by reproducing the magnetic recording tape, the Lch of the magnetic pattern (1 KHz)
Is a method of adjusting the distance by setting the difference between the reproduction output voltage values of Rch and Rch to 0.

[0006]

However, in the conventional tape reproducing method, magnetic recording accuracy, reproducing circuit accuracy, etc.
There is a problem that it is difficult to perform stable adjustment of the micrometer accuracy due to mixing of errors due to reproduction of a recording signal and variation of magnetic reproduction characteristics of the head itself.

The present invention has been made in view of the above circumstances, and provides a magnetic head position adjusting method and apparatus for improving the assembling accuracy of the head and the guide and performing stable position adjustment. Is intended.

[0008]

In order to achieve the above object, the present invention is: (1) In an assembly device for assembling a magnetic head to a tape guide, the tape is actually run and provided on the magnetic head. Positioning is performed by image-measuring the distance between the reference marker and the tape edge, or (2) a tape guide for running the tape, and a tape guide provided on the tape guide. It is characterized by comprising a magnetic head, a reference marker provided on the magnetic head, and an enlarging optical system for measuring a distance between the reference marker and the tape edge.

[0009]

[Function] A magnetic head is provided with a reference marker for alignment, the tape edge actually running and the reference marker are observed by a magnifying optical system such as a microscope, and the distance is automatically measured by image measurement to adjust the position. To do. By thus aligning the reference marker with the tape edge traveling along the tape guide, it is possible to adjust the position of the tape guide and the magnetic head with high accuracy.

[0010]

Embodiments will be described below with reference to the drawings. FIG. 1 is a block diagram for explaining an embodiment of a magnetic head position adjusting method and apparatus according to the present invention, in which 1 is a tape guide, 2 is a tape, 3 is a magnetic head,
Reference numeral 4 is a magnifying optical system such as a microscope. A magnetic head 3 is provided in the running path of the tape 2 of the tape guide 1 for running the tape 2. A reference marker 5 (FIG. 2) is provided on the magnetic head 3, and the reference marker 5
The distance between the tape guide edge and the tape edge is image-measured by a magnifying optical system such as a microscope 4, and the reference marker 5 is aligned with the tape edge, so that the tape guide 1 and the magnetic head 3 can be accurately adjusted in position. To be realized.

FIG. 2 is a microscope according to FIG. 1 (magnifying optical system).
It is a figure which shows the image observed by. As shown in FIG. 2, the reference mark 5 for alignment is previously formed on the magnetic head 3 in the same process as the process for forming a track or the like.
Is formed. The shape of the reference mark 5 shown in the drawing is a V-shaped mark, but it is not particularly limited to this shape. The distance L between the center of the reference mark and the tape edge can be easily measured by ordinary image processing, and since direct measurement without a recording signal or the like is performed, stable and highly accurate measurement is possible. .

[0012]

As is apparent from the above description, the present invention has the following effects. That is, by measuring the distance between the actually running tape edge and the reference mark of the magnetic head, it is possible to perform a highly accurate assembly of the tape guide and the magnetic head.

[Brief description of drawings]

FIG. 1 is a configuration diagram for explaining an embodiment of a magnetic head position adjusting method and apparatus according to the present invention.

FIG. 2 is a diagram showing an image observed by a microscope or the like in FIG.

FIG. 3 is a diagram showing a tape reproduction state in a conventional tape reproduction method.

FIG. 4 is a diagram showing a relationship between a track and a tape recording unit in a conventional tape reproducing method.

FIG. 5 is a diagram showing an output signal in a conventional tape reproducing method.

[Explanation of symbols]

1 ... tape guide, 2 ... tape, 3 ... magnetic head, 4 ...
Enlarging optical system such as microscope, 5 ... fiducial mark.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koji Hamada 22-22 Nagaike-cho, Abeno-ku, Osaka-shi, Osaka Within Sharp Co., Ltd. (72) Kimiko Kajimoto 22-22 Nagaike-cho, Abeno-ku, Osaka, Osaka Within the corporation

Claims (2)

[Claims] 1. An assembly apparatus for assembling a magnetic head to a tape guide, wherein the tape is actually moved, and the distance between a reference marker provided on the magnetic head and a tape edge is measured by an image to perform alignment. A magnetic head position adjusting method characterized by: 2. A tape guide for running a tape, a magnetic head provided in a running path of a tape running through the tape guide, a reference marker provided on the magnetic head, and the reference marker. A magnetic head position adjusting device comprising a magnifying optical system for measuring a distance from the tape edge.