JPH04248176A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To prevent the deposition of dust on the side faces of a rail even at the time of contact start stop (CSS) and to normally maintain the floating state of a slider by executing the CSS at the radius at which the yaw angle of the slider attains 0 deg.. CONSTITUTION:A positioning mechanism is so set as to execute the CSS at the middle periphery RM of a disk 2. The direction of the slider 1 and the moving direction VM of the disk 2 in this position coincide in this way and, therefore, the yaw angle alphaM of the slider 1 attains 0 deg.. The CSS is executed at the radius at which the yaw angle alphaM of the slider 1 attains 0 deg. in such a manner, by which the deposition of the dust on the side faces of the rail is prevented even at the time of the CSS and the floating of the slider 1 is normally maintained.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk drive having a rotary positioning mechanism.

0002

[Prior Art] In a conventional magnetic disk device, the radius (hereinafter simply referred to as CSS zone) at which a magnetic head slider (hereinafter simply referred to as slider) performs contact start/stop (hereinafter simply referred to as CSS) is shown in FIG. The slider 1 is set at the innermost circumference RI or the outermost circumference RO of the disk 2 where it is positioned. In particular, in the case of small-radius magnetic disk drives, C
Usually, the SS zone is set at the innermost circumference. In the case of a rotary positioning mechanism, the yaw angle αI at the innermost circumference and the yaw angle αO at the outermost circumference are usually adjusted so that the balance of the flying posture of the slider 1 does not change significantly at the innermost circumference RI and the outermost circumference RO. Distribute almost evenly.

That is, as the yaw angle αI or the yaw angle αO increases, the inclination of the flying posture (roll direction) increases. By arranging the slider 1 and the disk 2, that is, arranging the rotation center of the disk 2 and the swing center of the arm to which the slider 1 is attached, so that the yaw angle αO of the slider 1 at RO is almost equal, the roll direction can be adjusted. The inclination of the floating posture can be minimized. In this way, the slider 1 performs CSS with the yaw angle αI or αO at the innermost circumference RI or outermost circumference RO of the disk 2. Note that r indicates the rotational direction of the disk 2, VI and VO indicate the moving direction of the disk at the slider position at the innermost circumference of the disk and the outermost circumference of the disk, respectively, and T indicates the locus of the slider 1.

0004

[Problems to be Solved by the Invention] In the above-mentioned conventional magnetic disk device, when performing CSS with the slider having a yaw angle αI, for example, the edge of the rail 3 on the air inflow side has a Dust 4 tends to accumulate. When this dust 4 accumulates, it becomes difficult for the slider 1 to maintain a normal flying posture, which has the drawback of sometimes causing serious problems such as head crashes.

[0005]

SUMMARY OF THE INVENTION In a magnetic disk drive according to the present invention, the positioning mechanism is set so that the yaw angle of the magnetic head slider is 0 degrees.

[0006]

[Operation] According to the present invention, the floating state of the slider can always be maintained normally.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing the orientation of a slider with respect to a disk, showing an embodiment of a magnetic disk device according to the present invention. In this embodiment, CSS is applied to the middle circumference RM of the disk 2.
Set the positioning mechanism to do this. by this,
Since the direction of the slider 1 and the moving direction VM of the disk 2 at this position match, the yaw angle αM of the slider 1 can be set to 0 degrees.

FIG. 2 is a diagram showing the orientation of the slider with respect to the disk, showing another embodiment of the magnetic disk device according to the present invention. In this embodiment, the disk 2 and the positioning mechanism are arranged so that the direction of the slider 1 at the innermost circumference RI of the disk 2 matches the moving direction VI of the disk 2 at this position, and CSS is performed at this position. Set it as follows. However, at this time, the outermost circumference R of the disk 2
It is necessary to be careful not to make the floating attitude (roll) too large at O.

Similarly, it is possible to arrange the disk 2 and the positioning mechanism so that the yaw angle αO is 0 degrees at the outermost circumference RO of the disk 2, and to perform CSS at that position. Of course. In this way, by setting the CSS zone at a radius where the yaw angle of the slider 1 is 0 degrees, the dust 4 is prevented from accumulating on the air inflow side of the rail 3. Further, even if dust adheres to the side surface of the rail 3 during operation of the magnetic disk device, the dust adhered to the side surface of the rail 3 is removed, so that the flying state of the slider 1 can always be maintained normally.

0010

As described above in detail, according to the magnetic disk device of the present invention, CSS is performed at a radius where the yaw angle of the slider is 0 degrees, so that even during CSS, the rail This has the advantage that dust does not accumulate on the side surfaces, the slider can be kept in a normal flying state, and furthermore, the dust attached to the side surfaces of the rails during operation of the magnetic disk drive can be removed by the CSS.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the orientation of a slider with respect to a disk showing an embodiment of a magnetic disk device according to the present invention.

FIG. 2 is a diagram showing the orientation of a slider with respect to a disk showing another embodiment of a magnetic disk device according to the present invention.

FIG. 3 is a diagram showing a state in which dust is deposited on a slider in a conventional magnetic disk device.

FIG. 4 is a diagram showing the orientation of a slider at each diameter of a disk of a conventional magnetic disk device.

[Explanation of symbols]

1 Slider 2 Disc 3 Rail 4 Dust 5 Chamfa

Claims (1)

[Claims] 1. A magnetic disk drive having a rotary positioning mechanism, characterized in that the positioning mechanism is set so that the yaw angle of the magnetic head slider is 0 degrees.