JPS63811A - Servo pattern writing device - Google Patents

Abstract

PURPOSE:To obtain a servo pattern writing device capable of neglecting the azimuth loss of a bit of servo information, by writing a serve pattern by using a magnetic head mounted at a magnetic head mounting part in a magnetic disk device. CONSTITUTION:A magnetic disk 11 is mounted on a spindle motor 13 fixed at a base plate 12. A sub assembly mounting a magnetic head actuator 15 on which a magnetic head 14 is mounted, rotatably centering a pivot part 16, is fixed on a positioning board 17 by a clamper 18. By coupling an external actuator 19 with the magnetic head actuator 15, and moving the actuator 15, the servo pattern is written by the magnetic head 14. Therefore, since the readout of the servo pattern is performed at the same position, and by the same magnetic head as at time of writing, an zimuth angle goes around to zero, thereby, the azimuth loss can be neglected.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a servo pattern C writing method for a servo pattern writing device.

[Prior Art] The conventional two-position servo pattern writing method is as shown in FIG.
A subassembly mounted on a spindle motor 23 with a magnetic disk 21 fixed on a head plate 22 is fixed on a positioning table 27 with a clamper 28, and a servo-bakun write-only head 24 is mounted on a servo-bakun write-only actuator 29. Servo patterns were written on magnetic disks.

[Problem that the invention seeks to solve]

However, in the above-mentioned conventional technology, there is a relative angle between the gap of the servo buckle write-only head 24 and the gap of the magnetic head mounted on the magnetic disk gl due to variations in tolerance. There was a problem in that azimuth loss occurred when the magnetic head read out the servo pattern.

This azimuth loss increases as the access time becomes shorter and as the servo pattern frequency increases,
In addition, as magnetic disk drives become smaller, the smaller the radius of the innermost track, the thicker it becomes. In magnetic disk drives, the servo head output was reduced to less than half, or reading became impossible.

Therefore, in order to solve these problems, the present invention aims to provide a servo pattern writing device that can suppress the azimuth loss of servo signals to a negligible level even in a small magnetic disk device capable of high-speed access. .

Means for Solving Problem c] In order to solve the above problem, the servo pattern writing device of the present invention has a magnetic head mounted on a magnetic head mount portion of a magnetic disk device, and Use it to write servo patterns! I! It is assumed to be a P symptom.

[For production]

With the servo pattern writing device configured as above,
When writing a servo pattern, when reading the servo pattern,
Since reading is performed with the same magnetic head attached to the same position as when writing, the azimuth angle is approximately O°, and the azimuth loss is negligible.

〔Example〕

Embodiments of the present invention will be described below based on the drawings. In FIG. 1, a magnetic disk 11 is connected to a pace plate 12.
A subassembly is mounted on a spindle motor 13 fixed on the top of the positioning table 1, and a magnetic seven-door actuator 15 with a magnetic head 14 attached thereto is rotatably mounted on a pivot part 16 fixed on the base plate 12.
7 with a clamper 18, and an external actuator 19
Connect the magnetic head actuator 15 to the magnetic head actuator 15, and write the servo pattern to the magnetic field in steps 7 and 14 while moving the magnetic head actuator 15.

In the embodiments described above, the magnetic head actuator may be of a linear movement type, and the external actuator 19 may be of any type as long as it can precisely position the magnetic head actuator 15; It goes without saying that the object of the present invention can be achieved even if the magnetic head actuator 15 is moved by using its own drive function and feeding back position information or the like by some method.

〔Effect of the invention〕

As explained above, the present invention writes a servo pattern using a magnetic head mounted on a magnetic head mounting portion of a magnetic disk device, thereby eliminating the loss of one member of the azimuth of servo information. This has the effect of significantly improving positioning accuracy.

[Brief explanation of drawings]

FIG. 1 is a plan view of a servo pattern writing device according to the present invention. FIG. 2 is a plan view of a conventional servo pattern writing device. 11...Magnetic disk 12...Base plate 13...Spindle motor 14...Magnetic head 15...Magnetic head actuator 16...
... Pivot part 17 ... Positioning table 18 ... Clamper 19 ... External actuator 21 ... Magnetic disk 22 ... Base plate 23. ... Spindle motor 24 ... Servo pattern writing head 27 ...
...Positioning table 28...Clamper 29...Actuator for writing servo patterns and above

Claims (1)

[Claims] (1) In a servo pattern writing device that writes a servo pattern on at least one surface of a magnetic disk of a magnetic disk device, a servo pattern is written using the magnetic head with the magnetic head mounted on the magnetic head mount section of the magnetic disk device. A servo pattern writing device characterized by writing.