JPH05128765A - Servo track writer - Google Patents

Abstract

PURPOSE:To write the servo information to plural hard disk devices by one writing action by providing this servo track writer with plural fixed jigs and a spindle synchronizing circuit part. CONSTITUTION:After two hard disk devices 1a and 1b are respectively fixed and positioned to fixed jigs 2a and 2b, by the instruction of a control part 8, a spindle is rotated by spindle driving circuits 7a and 7b. At this time, by a spindle synchronizing circuit 9, the spindle of a device 1b is rotated in synchronization with the rotation of a device 1a. A reference clock synchronous to the rotation is generated by the control part 8, and written into the disk of the device 1a by a head 6. Next, the position of a servo information writing head 3a is detected by a position detecting part 5, positioned by a head driving part 4, a head 3b is connected to the head 3a by a head connecting part 10, the same action is operated, the positioning is performed, and the servo information prepared from a reference clock is written to respective disks by respective heads 3a and 3b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a servo track writer.

[0002]

2. Description of the Related Art A conventional servo track writer will be described in detail with reference to the drawings.

FIG. 2 is a block diagram showing a conventional example. The servo track writer shown in FIG. 2 fixes and positions the hard disk device containing the magnetic disk medium to be written by the fixing jig 2. In the positioned hard disk device 1, a servo information writing head 3 for writing servo information on the disk, a head drive unit 4 for positioning the head 3, a position detection unit 5 for detecting the position of the head 3, Reference clock writing head 6 for writing the reference clock of servo information on the disk
And a spindle drive circuit section 7 for rotating the disk at a constant speed. It is composed of a servo information writing control unit 8 for controlling writing, positioning, and spindle start / stop of each head 3, 6.

After the hard disk device 1 is positioned by the fixing jig 2, the spindle is rotated at a constant speed by the spindle drive circuit unit 7 in response to a spindle start command from the control unit 8. The control unit 8 generates a reference clock synchronized with the rotation, and the reference clock writing head 6 writes the reference clock on the disk. Next, the head drive unit 4 positions the servo information writing head 3 at a position where the servo information is desired to be written, and the control unit 8 writes the servo information generated from the reference clock on the disk. Further, the position of the head 3 is detected by the position detector 5.

[0005]

The above-mentioned conventional servo track writer is capable of performing one servo information writing operation once.
Since only one hard disk device can be written, and the servo information is written to N hard disk devices, the same work needs to be repeated N times, which requires work man-hours and is not suitable for mass production. .

[0006]

A servo track writer according to the present invention is for writing a plurality of fixing jigs for fixing a hard disk device containing a magnetic disk medium to be written and servo information on the disk. A servo information writing head provided in each of the hard disk devices, a head connecting portion that mechanically connects the heads, and a head drive provided only in a specific hard disk device for positioning and detecting the head. Unit and position detection unit, a reference clock write head for writing a reference clock of servo information on a disk, a spindle drive circuit unit provided in each hard disk device for rotating the disk, and all the magnetic disk media. Spindle synchronization circuit unit for rotating in synchronization, and each head Writing, configured to include a servo information write control unit for controlling the positioning.

[0007]

Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention. The servo track writer shown in FIG. 1 fixes and positions two hard disk devices 1a and 1b containing a magnetic disk medium to be written by fixing jigs 2a and 2b, respectively. After positioning, the spindle is rotated at a constant speed by the spindle drive circuits 7a and 7b in response to a spindle start command from the control unit 8. In addition, the spindle synchronization circuit unit 9 synchronizes with the rotation of the spindle of the hard disk device 1a to synchronize with another hard disk device 1b.
Spindle rotates. The control unit 8 generates a reference clock synchronized with the rotation, and the reference clock writing head 6 writes the reference clock on the disk of the hard disk device 1a.

Next, the position detecting section 5 attached to the hard disk device 1a detects the position of the servo information writing head 3a and the head driving section 4 positions it. Further, the servo information writing head 3b and the servo information writing head 3a are mechanically connected to each other by the head connecting portion 10 to perform the same operation, are positioned, and the control portion 8 outputs the servo information generated from the reference clock to each head 3a, 3b. Write on each disc with.

[0010]

Since the servo track writer of the present invention is provided with a plurality of fixing jigs and a spindle synchronizing circuit section, data can be written in a plurality of hard disk devices by one servo information writing operation. There is an effect that the amount of production per unit of time increases and mass production is possible.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a block diagram showing a conventional example.

[Explanation of symbols]

 1 hard disk device 2 fixing jig 3 servo information writing head 4 head drive unit 5 position detection unit 6 reference clock writing head 7 spindle drive circuit unit 8 servo information write control unit 9 spindle synchronization circuit unit 10 head connection unit

Claims (1)

[Claims] 1. A plurality of fixing jigs for fixing a hard disk device containing a magnetic disk medium to be written, and servo information provided in each hard disk device for writing servo information on the disk. A write head, a head connecting portion that mechanically connects the heads, a head driving portion and a position detecting portion provided only in a specific hard disk device for positioning and detecting the position of the head, and a reference clock for servo information. A reference clock write head for writing the data on the disk, a spindle drive circuit unit provided in each hard disk device for rotating the disk, and a spindle synchronization circuit unit for rotating all the magnetic disk media in synchronization. , Writing servo information to control writing and positioning of each head A servo track writer characterized by including only a control section.