JP2849554B2 - Spin desk for hard disk and magnetic head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an actual hard disk drive (hereinafter referred to as "H") having a rotary magnetic head positioning mechanism.
DD) and a spin stand used for testing magnetic heads.

[0002]

2. Description of the Related Art Rotary heads currently in widespread use
Although the positioning type HDD has the advantage of a compact structure, the problem that the head skew angle changes from track to track cannot be avoided. This head skew angle is related to the flying height of the magnetic head and is considered to appear as a change in head output. Therefore, when performing a read / write test or a glide test of the hard disk and the magnetic head, it is desirable to perform the test at the same skewing angle as that of the HDD, which includes the spindle of the spin stand to be tested. That is, the positional relationship with the positioner may be the same as that of the HDD.

A spin stand used for testing a hard disk and a magnetic head has a spindle for rotating the hard disk and a magnetic head positioning mechanism like the HDD, and takes into account positioning accuracy, operability, versatility and the like. Thus, the positioning of the magnetic head has been performed by a linear stage. In some rare cases, a spin stand uses a rotating magnetic head positioning mechanism to position a magnetic head.

[0004]

However, for the above reasons, it is difficult to make a compact structure like an HDD, and it is necessary to arrange the spindle and the magnetic head positioning mechanism so that the positional relationship is the same as that of the HDD. Could not.

[0005] If the head is intentionally given the same scan angle as that of the HDD, the positioning mechanism of the magnetic head must be provided with a × as described in Japanese Patent Application Laid-Open No. 5-298632.
A method of calculating a coordinate position at which a skew angle can be obtained by using a -Y orthogonal stage is conceivable, but it is costly.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic head having the same skewing angle as that of an HDD in order to solve the above-mentioned problems.
A light test can be performed at the same time, its operability is good, its configuration is simple, and it has general versatility.
An object of the present invention is to provide a spin desk for a desk and a magnetic head.

[0007]

In order to achieve the above object, the present invention provides a hard disk and a magnetic disk used in an actual hard disk drive having a hard disk rotating spindle and a rotary magnetic head positioning mechanism. In a spin stand for testing at least one of the heads, an output shaft of the rotating magnetic head positioning mechanism is disposed above and opposed to an output shaft of the hard disk rotating spindle, and The output shaft slides in an axial direction or away from the axis in parallel with the hard disk surface without contacting the output shaft of the hard disk rotation spindle, and the output shaft of the rotary magnetic head positioning mechanism. The distance between the hard disk rotating spindle and the output shaft is freely set, and the rotating magnetic head is Turning the de positioning mechanism is a spin stand for hard disc and the magnetic head is characterized in that can be tested with a skew angle of the same track position of the actual hard disc drive.

According to another aspect, the rotary magnetic head positioning mechanism mounts at least two magnetic heads on one side of the hard disk.

[0009]

By employing the hard disk and the magnetic head spin stand of the present invention, the output shaft of the revolving magnetic head positioning mechanism is disposed above the output shaft of the hard disk rotating spindle and opposed to the output shaft. The output shaft of the revolving magnetic head positioning mechanism slides in the axial direction or away from the axis parallel to the hard disk surface without contacting the output shaft of the hard disk rotating spindle. The center distance between the output shaft of the positioning mechanism and the output shaft of the hard disk rotating spindle is freely set, and the slewing magnetic head positioning mechanism is swiveled to have the same skew angle as the track position of the actual hard disk drive. In the test, the positional relationship between the output shaft of the rotating spindle and the magnetic head positioning mechanism is It can be arranged to be the same as the hard disk drive, has high performance as a reference machine, and has reduced space and size, and has one side of the hard disk of the rotating magnetic head positioning mechanism. By mounting at least two magnetic heads, burnishing, glide test, and read / write test can be performed at the same time, so that the operability is good, the productivity is improved, and the versatility is improved.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic block diagram of one embodiment of the present invention. The figure shows an embodiment of a desk certifier spin stand 100, which is equipped with a rotary positioner 107, which is a two-axis rotating magnetic head positioning mechanism, and one desk demagnetizing magnet eraser 112. The system includes a spindle 102 for rotating a desk 103 on a base 101, a slide base 104, a slide table 105, an eraser slide 111, a magnet eraser 112, and the like.

A rotary positioner 107 is mounted on a bracket 106 via a slide base 104 and a slide table 105.
The head load mechanism 108 is connected to a rotary output shaft (not shown). Further, a head jig 109 to which the head 110 is fixed is mounted on the head loading mechanism 108. The rotary positioner 107 rotates the head 110 to control the angle of the head loading mechanism 108 via a head jig 109.

The center distance between the rotary positioner 107 and the spindle 102 can be adjusted by moving the slide table 105. Normally, the turning radius of the head 110 is sufficient to manage the dimensions of the head jig, but it is also easy to equip an adjustment mechanism (not shown).

The rotary output shaft of the rotary positioner 107 is disposed above the rotary output shaft 102A of the spindle 102 so as to face the same, and the rotary output shaft of the rotary positioner 107 is in the direction of the axis of the rotary output shaft 102 or away from the axis. By freely setting the inter-axis distance I (FIG. 2) by sliding parallel to the surface of the desk 103 without touching the surface, the mounting space is saved, and at least two magnetic heads are provided on one side of the desk 103. In this embodiment, eight magnetic heads 110 are mounted, and the productivity is improved.

FIG. 2 shows a state diagram in which the skew angle changes depending on the track position. In the figure, the positional relationship between the spindle and the positioner is shown by the distance I (mm)
Assuming that θ is the skew angle (degree) and r is the track radius (mm) by arranging at the program length R (mm), the following equation (1) is obtained.
Holds.

[0016]

Θ = sin ⁻¹ (R ² + r ² −I ² ) / 2Rr (1) Accordingly, in order to perform an equivalent test, the turning arm length (head turning radius) R and the center distance are set. The (skew angle) θ can be automatically set by inputting and calculating the (center distance) I as a parameter to the CPU. The test spin stand 100 has very high accuracy as a reference machine, and is reduced in space with reduced space, versatility,
It is a spin stand with operability and the like.

FIG. 3 is an explanatory diagram of the procedure of the desk certifier shown in FIG. In the figure, the desk certifier attaches the desk 103 in FIG.
Using a head 110 having the same shape as the slider used for the magnetic head 110, burnishing is performed (the surface of the desk 103 is made flatter) in FIG.
After performing a hand glide test (confirmation after burnishing) on the magnetic head 110, a hand read / write test is performed on the magnetic head 110,
Finally, a step of erasing the residual magnetism on the desk surface 103 by the eraser 112 in FIG. In the drawings, the read head and the write head may be shared.

FIG. 4 shows a layout when the spin stand of the present invention is used in a production line. In the figure, a plurality of disk certifiers are used in this embodiment, and four disk certifiers are used.
A spin stand 100 is arranged, and a magazine 115 accommodating the disks 103 is arranged opposite to the spin stand 100. The autoloader 116 slides on the rail 117 to hold the disc 103 accommodated in the magazine 115 and mount it on the spindle 102 of the spin stand 100.

As described above, the spin stand 10 of the present invention
0 is the spindle 102 and the rotary positioner 107
The distance I between the shaft and the radius of rotation R of the head 110 is HD
D, the same head skew angle θ as that of the HDD is calculated and applied to the rotary positioner 107 to perform a test. In addition, by using the two rotary positioners 107, four heads 110 can be used on one side of the desk 103. It should be noted that the present invention is not limited to the above embodiment, but can be carried out in other aspects by making appropriate design changes. For example, one bracket is arranged on a base, and By mounting a two-axis rotary positioner and a head loading mechanism on the bracket via a slide table, space can be saved and compactness can be achieved.

[0020]

As is apparent from the above description, in the hard disk and the magnetic head spin stand of the present invention, the output shaft of the rotary magnetic head positioning mechanism is located above the output shaft of the hard disk rotating spindle. The output shaft of the orbiting magnetic head positioning mechanism is opposed to the output shaft of the hard disk rotating spindle, and slides in the axial direction or in the direction away from the axis in parallel with the hard disk surface without contacting the output shaft of the hard disk rotating spindle. The problem of the prior art can be effectively solved by setting the distance between the axes and turning the rotary magnetic head positioning mechanism to test at the same skew angle as the track position of the actual hard disk drive. So that the positional relationship between the output shaft of the magnetic head positioning mechanism and the output shaft of the magnetic head positioning mechanism is the same as that of the actual hard disk drive. DOO becomes possible, comprising a high performance as the reference apparatus, moreover space is miniaturized is reduced. In addition, by mounting at least two magnetic heads on one side of the hard disk of the rotating magnetic head positioning mechanism, burnishing, glide test, and read / write test can be performed simultaneously, and the operability is improved. , The productivity is improved and it has versatility.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention.

FIG. 2 is a state diagram in which a skew angle changes according to a track position.

FIG. 3 is an explanatory diagram of a procedure of a disc certifier shown in FIG. 1;

FIG. 4 is a layout when the spin stand of the present invention is used in a production line.

[Explanation of symbols]

REFERENCE SIGNS LIST 100 Spinner for disk certifier 101 Base 102 Spindle 103 Disk 104 Slide base 105 Slide table 106 Bracket 107 Rotary positioner 108 Head loading mechanism 109 Head jig 110 Head 111 Magnet erase ―The 115 Magazine 116 Autoloader

Claims (2)

(57) [Claims] 1. A spin stand having a hard disk rotating spindle and a rotating magnetic head positioning mechanism for testing at least one of a hard disk and a magnetic head used in an actual hard disk drive. The output shaft of the head positioning mechanism is disposed above and opposed to the output shaft of the hard disk rotating spindle, and the output shaft of the revolving magnetic head positioning mechanism contacts the output shaft of the hard disk rotating spindle. And slides in a direction parallel to or away from the axis parallel to the hard disk surface to freely set an inter-axis distance between the output shaft of the rotary magnetic head positioning mechanism and the output shaft of the hard disk rotating spindle. And turn the rotary magnetic head positioning mechanism to rotate the actual hard disk drive. A hard disk and a magnetic head spin stand that can be tested at the same skew angle as the track position of the magnetic head. 2. The hard disk and spin stand for a magnetic head according to claim 1, wherein the rotating magnetic head positioning mechanism mounts at least two magnetic heads on one surface of the hard disk.