JPH03269824A - Servo track information writing method - Google Patents

Abstract

PURPOSE:To miniaturize a device by employing such constitution that the intermediate of an arm on both terminals of which magnetic heads are attached is supported with a carriage provided between a master disk and a disk for write rotating at same speed, and the arm is rotated intermittently at a prescribed angle. CONSTITUTION:The carriage 14 is provided at the intermediate between a master magnetic disk 10 on which servo track information is recorded and a magnetic disk 12a on which the servo track information is recorded. A head arm 15 on the tip part of which a reproducing magnetic head 16 is fixed and a head arm 17 on the tip part of which a recording magnetic head 18 is fixed are mounted on the carriage 14 so as to be aligned in a line, and the head 16 is arranged on the disk 10, and the head 18 on the disk 12a. Write is performed by writing the servo track information on the disk 10 on the disk 12a by rotating the carriage 14 intermittently at a desired angle as rotating the disks 10 and 12a at the same speed. Thereby, the whole servo track information writer can be miniaturized.

Description

[Detailed Description of the Invention] Table of Contents Overview Industrial Field of Application Conventional Technology Problems to be Solved by the Invention Means for Solving the Problems Implementation Examples The purpose of the present invention is to provide a method for writing servo track information on a magnetic disk, which can reduce the size and cost of the servo track information. , a first head arm having a reproducing magnetic head fixed to its tip is located between the magnetic disk on which servo track information is written; and a recording magnetic head is fixed to its tip on an extension of the first head arm. disposing a carriage to which a first head arm is attached, which rotates the reproducing and recording magnetic heads symmetrically, and disposing the reproducing magnetic head over the master magnetic disk;
The recording magnetic head is placed on the magnetic disk, and while the master magnetic disk and the magnetic disk are rotated at the same speed, the carriage is intermittently rotated at a desired angle to control the servo of the master magnetic disk. Track information is configured to be written on the magnetic disk.

Industrial applications The present invention relates to a servo track information writing method.

In recent years, as the demand for computers has increased, a wide variety of computers have come on the market, and there is no shortage of effort in their development. When developing computers, there is a demand for even faster processing speeds, but accuracy during processing also plays an important role, so the accuracy during recording/reproduction of computer magnetic recording devices is also an important factor. It becomes.

A typical magnetic recording device for computers is a hard disk, and one of the important elements that controls the accuracy of recording/playback on this hard disk is the servo disk that is incorporated with multiple magnetic disks. It will be done. This servo disk has recorded thereon servo track information necessary to control the head positioner during recording/reproduction on other magnetic disks. When writing this servo track information onto a servo disk, it must be written as accurately as possible for the reasons mentioned above, and the equipment for this purpose is large and expensive. Therefore, there is a need for a method for writing servo track information that can make the device as inexpensive and compact as possible.

2. Description of the Related Art Conventionally, as a method of writing servo track information on a magnetic disk, a method using a servo track information writing device shown in FIG. 8 is known.

In this servo track information writing device, in order to suppress vibrations to a minimum, an air spindle 2 is fixed to the lower end of a square of a large stone board 1 as a base, as shown in the figure.

A cylindrical spindle 3 is rotatably attached to the fixed stone board 1 at a desired position, and a spindle motor 4 for rotating the spindle 3 is connected to the spindle 3 protruding from the lower surface of the fixed stone board 1. is connected to the lower end of the belt 5 via a belt 5. A plurality of magnetic disks 5 are mounted on a spindle 3 protruding from the top surface of the stone board 1.
They are fixed with their horizontal planes perpendicular to the rotating shaft 3a and arranged at equal intervals. One of the plurality of magnetic disks 5 is a servo disk 5a on which servo track information is recorded, and the other magnetic disks 5 are used to record/reproduce data necessary for office processing or technical calculations, etc. It is.

6 is a carriage, and a head arm 7 is attached to the side thereof.
is fixed perpendicular to the vertical plane, and a head 8 for writing servo track information is at the tip of the head arm 7.
is fixed. An optical device 9 emits a laser beam to the carriage 6, detects the position of the carriage 6 based on the incident angle of the light reflected by the carriage 6, and controls the carriage 6.

According to such a configuration, since a laser beam is used for positioning when writing servo track information on the servo disk 5a, the track pitch is measured with high accuracy of ±0.1 to 0.2 μm and the servo track information is measured. can be written. Further, according to this device, after writing the servo track information, it is possible to automatically inspect the quality (output, pulse radiation, timing, noise), eccentricity, track pitch, etc. of the servo track information.

Problem to be Solved by the Invention By the way, in the method using the servo track information writing device described above, an optical system (optical device 9) is used for positioning when writing servo track information. Since it is very expensive and the cost of the entire device is high, there is a problem in that the overall price becomes high.

Furthermore, since the size of the optical system is large and its size occupies a large proportion of the entire device, there is a problem that the entire device must be made large.

The present invention has been made in view of these points,
It is an object of the present invention to provide a method for writing servo track information that can reduce the size of the device and reduce the cost.

Means to solve problems FIG. 1 is a diagram showing the principle of the present invention.

As shown in this figure, in the method of writing servo track information to a magnetic disk, first, a magnetic disk 12a is placed between a master magnetic disk 10 on which servo track information is recorded and a magnetic disk 12a on which servo track information is written.
Place the carriage 14. Then, the first head arm 15 having the reproduction magnetic head 16 fixed to the tip thereof and the second head arm 17 having the recording magnetic head 18 fixed to the tip thereof are aligned in a straight line on the carriage 14. The reproducing magnetic head 16 is placed on the master magnetic disk 10, and the recording magnetic head 18 is placed on the magnetic disk 12a. When writing servo track information, the master magnetic disk 10
While rotating the magnetic disk 12a and the magnetic disk 12a at the same speed, the carriage 14 is intermittently rotated by a desired angle, thereby rotating the reproducing magnetic head 16 and the recording magnetic head 18 by the same angle from t:. , the servo track information of the master magnetic disk 10 is written to the magnetic disk 12a.

In addition, as another configuration method, a plurality of magnetic disks may be arranged around the master magnetic disk with the carriage interposed therebetween, or a plurality of magnetic disks may be arranged together with the master magnetic disk so that the rotation axis of the disks is The servo track information may be written on a plurality of magnetic disks at the same time by arranging them in a polygonal shape.

Furthermore, as another configuration method, the servo track information may be written by moving the carriage on a straight line connecting the rotation axis of the master magnetic disk and the rotation axis of the magnetic disk.

There is also a method of writing servo track information using a master magnetic disk having a diameter different from that of the magnetic disk.

According to the present invention, since the master magnetic disk, the writing magnetic disk, and the reproducing magnetic head and the recording magnetic head are arranged symmetrically with respect to the carriage, the servo tracks recorded on the master magnetic disk are The information is
The information is sequentially read by a reproducing magnetic head and sequentially written onto a magnetic disk by a recording magnetic head.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing the principle of the servo track information writing method of the present invention, and FIG. 2 is for explaining the servo track information writing method according to the first embodiment based on the principle of the present invention shown in FIG. This is a diagram. In addition, in these figures, the same reference numerals are given to the parts corresponding to each part.

In these figures, 10 is a master disk on which servo track information is magnetically recorded, and is attached to a spindle 11 that is rotatable in the direction of arrow Y. Reference numeral 12 denotes a plurality of magnetic disks including a servo disk 12a on which servo track information is recorded, and each of these magnetic disks 12 has its horizontal plane perpendicular to the rotation axis 13a of the spindle 13 and is spaced at equal intervals. placed and attached. The spindle 13 rotates in the direction of arrow Y in synchronization with the spindle 11 at the same speed.

Reference numeral 14 denotes a carriage whose rotation $11114J is arranged between the rotation axis 11a of the spindle 11 and the rotation axis 13a of the spindle 13. This carriage 14
can be rotated in either the left or right direction, as shown by arrow Y2, and can be rotated by a desired angle.

A first head arm 15 is fixed substantially perpendicularly to the outer peripheral surface of the carriage 14, and a reproducing head 16 for reading servo track information is fixed to the tip of the first head arm. Further, the sliding surface of the reading head 16 is connected to the master disk 10.
is facing the top surface of. A second head arm 17 has the same length as the first head arm, and a recording head 18 for writing servo track information is fixed at the tip thereof. This second head arm 17 is fixed to the outer peripheral surface of the carriage 14 at a position symmetrical to the first head arm,
The position of the writing head 18 fixed to the tip is rotationally symmetrical with respect to the position of the reproducing head 16 and the carriage 14. Further, the sliding surface of the recording head 18 faces the upper surface of the servo disk 12H. The recording head 18 and the reproducing head 16 are electrically connected, and a signal read by the reproducing head 16 is transmitted to the recording head 18 via a control circuit (not shown). ing.

In such a configuration, when writing servo track information recorded on the master disk 10 to the servo disk 12a, first, as shown in FIG. 16 and a recording head 18 are arranged on the innermost tracks of the master disk 10 and the servo disk 12a, respectively. Then, the master disk 10 and the servo disk 12a are rotated at the same speed in the direction of arrow Y (see FIG. 2), and the carriage 14 is rotated by a desired angle in the direction from the innermost track to the outermost track, and the reproduction is performed. The servo track information recorded on the master disk 10 is sequentially written onto the servo disk 12a by moving the recording head 16 and the recording head 18.

That is, the servo track information recorded on the innermost track (first track) of the master disk 10 is read by the reproducing head 16, and the read information (signal) is transferred to the innermost track of the servo disk 12a by the recording head 18. The information of the second track of the master disk 10 is written to the second track of the servo disk 12a, then the third track, the fourth track, etc., the outermost track. Track and write sequentially.

Further, this writing may be performed in the direction from the outermost track to the innermost track.

In this way, the servo track information recorded on the master disk 10 can be recorded on the servo disk 12a, and by rotating the carriage 14 itself by a desired angle, the position when writing the servo track information can be adjusted. Since it is possible to extract the light, there is no need to use an optical system as in the conventional method. Therefore, the device can be made smaller than before, and the overall price can be reduced.

Next, a method for writing servo track information according to a second embodiment of the present invention will be described with reference to FIG. In FIG. 3, parts corresponding to those in FIGS. 1 and 2 are designated by the same reference numerals, and some explanations thereof will be omitted.

The second embodiment differs from the first embodiment in that the servo track information recorded on the master disk 10 can be simultaneously written and recorded on a plurality of (four) servo disks.

That is, as shown in FIG.
Servo disks 124, 12a12a2.12a3 are arranged, and first and second head arms 15-17.15a-174, 15b are mounted on each carriage 14.14a-14c.
-17b15cm17c, symmetrically playback heads 16.16a to 16c and recording head 18°1
8a to 18C are fixed, and each reproduction head 16.1
The sliding surfaces of the recording heads 18.18a to 18c are arranged to face the upper surface of the master disk 10, and the sliding surfaces of the recording heads 18.18a to 18c are connected to each servo disk 12a.

124, - 12a3 are arranged opposite to each other. Further, the master disk 10 and each servo disk 124, 12al to 12a3 are configured to rotate at the same speed in synchronization, and each carriage 14
．． 14a to 14c also rotate in synchronization with each other.

According to such a configuration, similarly to the first embodiment, the reproduction heads 16.16a to 16C are arranged on the innermost track of the master disk 10, and the recording heads 18.18a to 16C are arranged on the innermost track of the master disk 10.
18C to each servo disk 124, 12al ~ 12
a3, and rotate the master disk 10 and servo disks 124, 12a+ to 12as in the direction of arrow Y (see FIG. 2), and then move the carriages 14.14a to 14C from the innermost track. While rotating each servo disk 12a by a desired angle in the direction toward the outermost track, the servo track information recorded on the master disk IO is transferred to each servo disk 12a.

It is possible to sequentially write to 12a+ to 12a3.

In other words, according to the present embodiment, servo track information can be written on a plurality of (four) servo disks 124, 12al to 12a3 at the same time, so that work efficiency can be improved.

Next, a servo track information writing method according to a third embodiment of the present invention will be described with reference to FIG. In FIG. 4, parts corresponding to those in FIGS. 1 and 2 are denoted by the same reference numerals, and some explanations thereof will be omitted.

This third embodiment differs from the first embodiment in that it has a reproducing head 16 and recording heads 18d and 13e at the tip.
The servo track information recorded on the master disk IO can be simultaneously written and recorded on two servo disks 12a124 using a single carriage 14 with head arms 17, 17d, and 17e fixed respectively in three directions. That's what I did.

That is, as shown in FIG. 4, the magnetic disks 10, 124, . 12a.

The carriage 14 is placed in the center of the equilateral triangle with the rotating shaft 14J aligned, and the reproduction head 16 and each servo disk 12a are placed on the master disk IO.
, 12as, recording heads 18d and 18e are respectively arranged to record servo track information. However, in the above-described embodiment, the magnetic disks 10.12a4.12as are arranged in an equilateral triangle, but the arrangement does not necessarily have to be an equilateral triangle, but may be any triangle.

In addition, in the above-mentioned embodiment, a total of three disks, the master disk 10 and two servo disks 124, 12a5, were used, but three servo disks were used, and a total of four disks were arranged in a square, and four heads were used. A carriage with a fixed arm may be used so that servo track information can be written on three servo disks at the same time. Furthermore, if the overall size is not considered, the number of servo disks can be further increased and the master disk and each servo disk can be arranged in a polygon according to the increased number.

According to such a configuration, servo track information can be written to a plurality of servo disks at the same time using one carriage 14, so that work efficiency can be improved. In addition, since the number of components is small and the work efficiency is high, it can be realized at low cost.

Next, a method for writing servo track information according to a fourth embodiment of the present invention will be described with reference to FIG. In FIG. 5, parts corresponding to those in FIGS. 1 and 2 are given the same reference numerals, and some explanations thereof will be omitted.

This fourth embodiment differs from the first embodiment in that the carriage 20 to which the first and second head arms 15, 17 are fixed is located at the center of rotation of the master disk 10 (rotational axis 11a).
) and the rotation center of the servo disk 12H (rotating shaft 13a>
While moving, the servo track information recorded on the master disk 10 is written and recorded on the servo disk 12a.

However, in this case, the servo track information recorded on the innermost track of the master disk 10 is written and recorded on the outermost track of the servo disk 12a. That is, servo track information is written and recorded on the servo disk 12a in the opposite direction to the recording direction of the master disk 10.

Next, a servo track information writing method according to a fifth embodiment of the present invention will be described with reference to FIG. Note that in FIG. 6, parts corresponding to those in FIGS. 1 and 2 are designated by the same reference numerals, and some explanations thereof will be omitted.

This fifth embodiment differs from the first embodiment in that it uses a master disk 30 with a smaller diameter than the master disk 10 shown in FIG. The first and second head arms 3 whose respective length ratios correspond to the ratio of
The servo track information recorded on the master disk 30 is written and recorded on the servo disk 12a using the carriage 34 having a diameter of 2.33.

According to such a method, servo track information can be written on the master disk 30, which has a smaller diameter than the servo disk 12a, so the entire device can be downsized by the space created by making the master disk 30 smaller. can.

Next, a method for writing servo track information according to a sixth embodiment of the present invention will be described with reference to FIG. Note that in FIG. 7, parts corresponding to those in FIGS. 1 and 2 are designated by the same reference numerals, and some explanations thereof will be omitted.

This sixth embodiment differs from the first embodiment in that a master disk 40 having a larger diameter than the master disk 10 shown in FIG. 1 is used, and the diameter of the master disk 40 and the diameter of the servo disk 12a are The first and second head arms 4 whose respective length ratios correspond to the ratio of
The servo track information recorded on the master disk 40 is written and recorded on the servo disk 12a using the carriage 44 having a diameter of 2.43.

According to such a method, servo track information can be written on the master disk 40 having a larger diameter than the servo disk 12a, so information can be written in high density on the servo disk 12a using a high frequency signal. can. Therefore, highly accurate servo track information can be written.

As described in detail, according to the present invention, the entire servo track information writing device can be made smaller and less expensive.

Furthermore, since information can be recorded on multiple magnetic disks at the same time, work efficiency can be improved.

Furthermore, there is an effect that highly accurate servo track information can be written.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the principle of the present invention. FIG. 2 is a diagram for explaining a servo track information writing method according to a first embodiment of the present invention. FIG. 3 is a diagram showing a servo track according to a second embodiment of the present invention. A diagram for explaining an information writing method, FIG. 4 is a diagram for explaining a servo track information writing method according to a third embodiment of the present invention, and FIG. 5 is a diagram for explaining a servo track according to a fourth embodiment of the present invention. A diagram for explaining an information writing method, FIG. 6 is a diagram for explaining a servo track information writing method according to a fifth embodiment of the present invention, and FIG. 7 is a diagram for explaining a servo track according to a sixth embodiment of the present invention. FIG. 8 is a diagram for explaining a conventional servo track information writing method. 16.164, 16b, 16cm... magnetic head for reproduction, 17 174, 17b, 17c, 17d,
17e, 33...Second head arm, 18.184, 18b, 18cm...Magnetic head for recording.

Claims (1)

[Claims] 1. In a method for writing servo track information on a magnetic disk, a master magnetic disk (on which servo track information is recorded)
10) and the magnetic disk (12a) on which the servo track information is written, there is a reproducing magnetic head (16).
A first head arm (15) has a magnetic head fixed to its tip, and a second head arm (1) has a recording magnetic head (18) fixed to its tip on an extension of the first head arm (15).
7) is attached to the carriage (1) and rotates the reproducing and recording magnetic heads (16, 18) symmetrically.
4), and the reproduction magnetic head (16) is placed on the master magnetic disk (16).
10) and placing the recording magnetic head (18) on the magnetic disk (12a), while rotating the master magnetic disk (10) and the magnetic disk (12a) at the same speed. , the carriage (14) is intermittently rotated at a desired angle, and the master magnetic disk (14) is rotated at a desired angle.
The servo track information of 10) is transferred to the magnetic disk (12).
a) A servo track information writing method characterized by writing in. 2. A plurality of magnetic disks (12a, 12a_1, 12a) are placed around the master magnetic disk (10) with the carriage (14, 14a, 14b, 14c) interposed
_2, 12a_3), and the carriage (
14, 14a, 14b, 14c) first head arm (
The reproducing magnetic head (16, 16a, 16b, 16c) fixed to the carriage (15, 15a, 15b, 15c) is placed on the master magnetic disk (10), and
4, 14a, 14b, 14c) second head arm (1
The recording magnetic heads (18, 18a, 18b, 18c) fixed to the plurality of magnetic disks (12a, 12a_1, 12a_2, 12
a_3), the master magnetic disk (10) and the plurality of magnetic disks (12a, 12a_1, 12a_2, 12a_3)
While rotating the carriage (14) at the same speed,
, 14a, 14b, 14c) are intermittently rotated at a desired angle to transfer the servo track information of the master magnetic disk (10) to the plurality of magnetic disks (12a, 12a_1,
2. The servo track information writing method according to claim 1, wherein the servo track information is written to 12a_2, 12a_3). 3. In the method of writing servo track information to a magnetic disk, a master magnetic disk (10) and a plurality of magnetic disks (
12a_4, 12a_5) so that the outer peripheries of the master magnetic disk (10) and the plurality of magnetic disks (12a_4, 12a_5) are arranged at each vertex of a polygon, and The master magnetic disk (10) and the plurality of magnetic disks (12a_4) are placed in the center of the magnetic disk (10) and the plurality of magnetic disks (12a_4, 12a_5).
, 12a_5), the number of head arms (15, 1
7d, 17e);
and the head arms (15, 17) of the carriage (14).
The reproducing magnetic head (16) fixed to one head arm (15) of the carriage (17e) is placed on the master magnetic disk (10), and the other head arm (17e) of the carriage (14) is placed on the master magnetic disk (10). Recording magnetic heads (18d, 18e) respectively fixed to the magnetic disks (17d, 17e) are arranged on the plurality of magnetic disks (12a_4, 12a_5), respectively, and the master magnetic disk (10) and the plurality of magnetic disks (12a_4) , 12a_5) at the same speed, the carriage (14) is intermittently rotated at a desired angle, and the servo track information of the master magnetic disk (10) is transferred to the plurality of magnetic disks (12a_4, 12a_5).
2a_5) A servo track information writing method characterized by writing to 2a_5). 4. In the method of writing servo track information to a magnetic disk, a master magnetic disk (on which servo track information is recorded)
10) and a magnetic disk (12a) on which servo track information is written, there is a first head arm (15) having a reproducing magnetic head (16) fixed to its tip; ), a second head arm (17) has a recording magnetic head (18) fixed to its tip.
) is mounted on the carriage (20), the reproducing magnetic head (16) is disposed on the master magnetic disk (10), and the recording magnetic head (18) is disposed on the master magnetic disk (10).
) is placed on the magnetic disk (12a), and the master magnetic disk (10) and the magnetic disk (
12a) at the same speed, move the carriage (20) on a straight line connecting the central axis of the master magnetic disk (10) and the central axis of the magnetic disk (12a), A servo track information writing method characterized by writing servo track information of a disk (10) onto the magnetic disk (12a). 5. In the method of writing servo track information to a magnetic disk, a magnetic disk (12
a) and a master magnetic disk (30) on which servo track information is recorded and which has a different diameter from the magnetic disk (12a). ), a carriage (34) is mounted so that a first head arm (32) and a second head arm (33) having a length corresponding to the diameter of the carriage (34) are aligned in a straight line.
), the reproducing magnetic head (16) fixed to the tip of the first head arm (32) of the master magnetic disk (
30) a recording magnetic head (18) disposed on the magnetic disk (12a) and fixed to the tip of the second head arm (33) of the carriage (34); A disk (30) and the magnetic disk (
12a) at the same speed, the carriage (34) is intermittently rotated at a desired angle, and the servo track information of the master magnetic disk (30) is written to the magnetic disk (12a). How to write servo track information.