JPH07230678A - Device for writing servo data for magnetic disk device and method therefor - Google Patents

Abstract

PURPOSE:To unnecessitate work for attaching and detaching a cover member and processing of sealing, etc., and also to realize processing of writing servo data with high accuracy in the device for writing the servo data to an HDD by keeping the state of supporting both ends of a fixed shaft without using the cover member such as a dummy cover and a particularly processed top cover, etc. CONSTITUTION:At the time of writing the servo data, a both-end supporting mechanism 24 is moved to the HDD 22 fixed to a reference base 21. The both- end supporting mechanism 24 is moved until a shaft supporing piston member comes into contact with the fixed shaft 7b. The shaft supporting piston member under the state of supporting the fixed shaft 7b is locked by a lock pin member. After completion of the processing of writing the servo data, the both-end supporting mechanism 24 is moved to be separated from the fixed shaft 7b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a servo data writing device for writing servo data on a disk of a hard disk device.

[0002]

2. Description of the Related Art Conventionally, a small hard disk device (HD
In D), as shown in FIG. 10, a disk 2, which is a recording medium, a head 3, a head moving mechanism (or a carriage mechanism) 4, a disk rotating mechanism 7, and the like are housed in a metal case 1. ing. The case 1 is covered by the top cover 5. The top cover 5 can be attached to or removed from the case by using a fixing screw 6. The disc 2 is fixed to the disc rotating mechanism 7. The disk rotating mechanism 7 rotates the fixed disk 2 at high speed. In order to realize this high speed rotation, the disk rotation mechanism 7 is provided with a spindle motor described later. The head moving mechanism 4 includes a swing arm 4a for moving the head 3 on the disk 2 via the suspension 3a, a voice coil motor 4b for rotationally driving the swing arm 4a in the radial direction of the disk 2, and a rotation for supporting the swing arm 4a. It is composed of a shaft 4c and the like.

FIG. 11A is a side sectional view showing the periphery of the disk rotating mechanism inside the HDD with the top cover 5 removed. As shown in the figure, the disk rotating mechanism 7 is composed of a disk pressing member 7a, a rotating shaft 7b, a bearing 7c, a screw hole 7d, a hub 7e, a spacer ring 7f, a spindle motor 7g and the like. The hub 7e is, for example, 3
The disc 2 is fixed. The spacer ring 7f provided on the hub 7e maintains a constant axial distance between the adjacent disks 2. Disc pressing member 7a
Presses the disk 2 and the spacer ring 7f in the axial direction. The rotating shaft 7b is supported by a bearing 7c. A screw hole 7b for engaging with one of the fixing screws 6 when the top cover 5 is attached is provided at the free end of the rotary shaft 7b. The spindle motor 7g includes a hub 7e to which the disk 2 and the like are attached,
The rotary shaft 7b is driven to rotate.

FIG. 11B is a side sectional view showing the periphery of the disk rotating mechanism inside the HDD to which the top cover 5 is attached. As shown in the figure, when the top cover 5 is attached, one of the fixing screws 6 is engaged with the screw hole 7d of the rotary shaft 7b. In this case, since the free end side of the rotary shaft 7b is fixed by the top cover 5, the asynchronous vibration generated on the rotary shaft 7b by the rotational driving of the spindle motor 7g is suppressed.

FIG. 12A is a side sectional view showing the periphery of the head moving mechanism inside the HDD with the top cover 5 removed. As shown in the figure, the head moving mechanism 4 is composed of a rotating shaft 4c, a bearing 4d, a screw hole 4e, etc. in addition to the swing arm 4a and the voice coil motor 4b described above. The rotating shaft 4c is supported by a bearing 4d. A screw hole 4e for engaging with one of the fixing screws 6 when the top cover 5 is attached is provided at the free end of the rotary shaft 4c. The voice coil motor 4b includes a swing arm 4a and a rotary shaft 4c.
It is driven to rotate around.

FIG. 12B is a side sectional view showing the periphery of the head moving mechanism inside the HDD with the top cover 5 attached. As shown in the figure, in the state where the top cover 5 is attached, one of the fixing screws 6 is the screw hole 4 of the rotary shaft 4c.
engaged with e. In this case, since the free end side of the rotary shaft 4c is fixed by the top cover 5, the asynchronous vibration generated on the rotary shaft 4c by the rotational driving of the spindle motor 7g is suppressed.

When manufacturing an HDD, a process for writing servo data used for positioning control of the head 3 to the disk 2 is usually performed. FIG. 13 is a perspective view showing how servo data is written on the disk 2. When the sector servo method is adopted, the data surface of the disk 2 is provided with both a user area for recording user data and a servo area for recording servo data. When writing servo data, a dedicated servo data writing device called a servo writer is usually used. The servo writer is provided with a base (not shown) for fixing the case 1 of the HDD. The servo writer uses the head moving mechanism 4 incorporated in the HDD to write servo data at a predetermined position on the disk 2.

Further, the servo writer is a clock head 1
0 and a positioning actuator mechanism 11. The clock head 10 records a reference clock required for writing servo data on the disk 2. The clock head 10 is supported by a suspension 10a. The suspension 10a is attached to a clock head support mechanism (not shown). On the other hand, the positioning actuator mechanism 11 positions the head 3 at a position where servo data should be recorded. The positioning actuator mechanism 11 is provided with a positioning pin 11a.
The positioning pin 11a guides the swing arm 4a to position the head 3 supported by the suspension 3a at a predetermined position.

When writing servo data by the servo writer, there are several methods. First
According to this method, as shown in FIG. 13, the writing process is performed as it is with the top cover removed from the HDD. That is, the servo data is written while the free end of the rotary shaft 7b of the disk rotating mechanism 7 is released (hereinafter referred to as a cantilevered support state).

According to the second method, as shown in FIG. 14A, the dummy cover 12 is attached to the HDD as a substitute for the top cover. The dummy cover 12 is fixed to the case 1 with a plurality of fixing screws 12a. One of the fixing screws 12a is engaged with a screw hole 7d provided in the rotating shaft 7b. Therefore, as in the case where the top cover is attached, the servo data is written in a state in which the free end side tip portion of the rotary shaft 7b is supported (supported by both ends). Therefore, the asynchronous shake generated on the rotating shaft 7b is suppressed. On the other hand, the dummy cover 1
2 is attached as shown in FIG. 14 (B),
The rotating shaft 4c can be held in a two-sided supported state.

Finally, according to the third method, as shown in FIG. 15, the writing process is performed with the top cover 5 attached. In this case, the top cover 5 is provided with openings 13a and 13b, respectively, so that the clock head 10 and the positioning pin 11a can freely move within a predetermined range. As a result, the servo data is written while the rotary shaft 7b and the rotary shaft 4c are held in the both-supported state.

[0012]

As described above, as a conventional method of writing servo data on the disk 2 of the HDD by using the servo writer, a method in which the fixed shaft 7b of the disk rotating mechanism of the HDD is cantilevered is used. There are a first method, a method using the dummy cover 12 (second method), and a method using the top cover 5 having the openings 13a and 13b (third method).

However, each method has the following drawbacks. That is, in the cantilevered method (first method), the free end side tip portion of the fixed shaft 7b is not supported, so that asynchronous runout generated on the rotary shaft 7b by the rotational drive of the spindle motor 7g increases. To do. Similarly,
Since the free end of the rotary shaft 4c is also not supported,
Asynchronous vibration generated on the rotary shaft 4c supporting the swing arm 4a increases. As a result, servo data with many vibration components will be written to the disk 2. Therefore, the positioning accuracy when actually performing the positioning control of the head 3 based on the servo data recorded on the disk 2 after writing the servo data deteriorates.

In the method using the dummy cover 12 (second method), the rotary shaft 7b is used because both sides are held.
It is possible to suppress the occurrence of asynchronous shake of. Therefore, it is possible to write the servo data with high accuracy.
However, complicated work of attaching and removing the dummy cover 12 is required. Furthermore, it is easy for dust and the like to be mixed into the HDD during the mounting / removing work.

Further, in the method of using the top cover 5 having the openings 13a and 13b (third method), the strength of the top cover 5 is lowered because of the openings 13a and 13b. For this reason, it is not possible to sufficiently suppress the non-synchronous runout generated in the rotary shaft 7b and the rotary shaft 4c. Further, after the servo data writing is completed, the openings 13a and 13a
Work for sealing b is required.

According to the present invention, in a servo data writing device for writing servo data in an HDD, each fixed shaft is supported in a double-supported manner without using a cover member such as a dummy cover or a specially processed top cover. By doing so, it is an object of the present invention to eliminate the work such as the removal of the cover member and the sealing process, and to realize the highly accurate writing process of the servo data.

[0017]

[Means for Solving the Problems]

(First Invention) A servo data writing device according to a first invention moves a rotating mechanism for rotating a recording medium, a head mechanism for writing servo data as positioning information on the recording medium, and the head mechanism. A servo data writing device for a magnetic disk device comprising a carriage mechanism, wherein a base for fixing the magnetic disk device, a head positioning means for positioning the head mechanism, and a rotating operation by the rotating mechanism are provided. First supporting means for supporting the free end of the rotary shaft of the recording medium so as to suppress the vibration generated thereby, and the first supporting means is a piston for supporting the free end of the rotary shaft of the recording medium. It has a lock mechanism for fixing the movement of the mechanism and the piston mechanism.

(Second Invention) A servo data writing device according to a second invention is a rotating mechanism for rotating a recording medium, a head mechanism for writing servo data as positioning information on the recording medium, and the head mechanism. A servo data writing device of a magnetic disk device, comprising: a base for fixing the magnetic disk device; head positioning means for positioning the head mechanism; and rotating operation by the rotating mechanism. Second supporting means for supporting the free end of the rotary shaft of the carriage mechanism so as to suppress the vibration caused by the above, and the second supporting means supports the free end of the rotary shaft of the carriage mechanism. And a lock mechanism for fixing the movement of the piston mechanism.

[0019]

[Action]

(First invention) A magnetic disk device is fixed to a base,
The storage medium is rotated by the rotating mechanism. The free end of the rotating shaft of the recording medium is supported by the first supporting means so as to suppress vibrations caused by the rotating operation of the rotating mechanism. At this time, the piston mechanism provided in the first supporting means supports the free end of the rotary shaft of the recording medium, and the movement of the piston mechanism is fixed by the lock mechanism. In this state, the head mechanism is moved to a predetermined position by the carriage mechanism, and
Positioned by the head positioning means. And
Servo data as positioning information is written on the recording medium by the head mechanism.

As a result, the asynchronous vibration generated on the rotating shaft supporting the storage medium is sufficiently suppressed, and the asynchronous vibration is not transmitted to the storage medium. Therefore, the servo data is written in the storage medium with high accuracy.

(Second Invention) The magnetic disk device is fixed to the base, and the storage medium is rotated by the rotating mechanism.
The free end of the rotary shaft of the carriage mechanism is supported by the second support means so as to suppress the vibration caused by the rotating operation of the rotating mechanism. At this time, the piston mechanism provided in the second support means supports the free end of the rotary shaft of the carriage mechanism, and the movement of the piston mechanism is fixed by the lock mechanism. In this state, the head mechanism is moved to a predetermined position by the carriage mechanism and positioned by the head positioning means. Then, the servo data as the positioning information is written on the recording medium by the head mechanism.

As a result, the asynchronous vibration generated on the rotary shaft supporting the carriage mechanism is sufficiently suppressed, and the asynchronous vibration is not transmitted to the carriage mechanism or the head mechanism. Therefore, the servo data is written in the storage medium with high accuracy.

[0023]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the overall configuration of a servo data writing device according to the first embodiment of the present invention. As shown in FIG. 1, the present apparatus according to the first embodiment includes a lower base 20 of the apparatus main body, a reference base 21 for fixing a hard disk drive (HDD) 22 to which servo data is written, and an apparatus main body. It has an upper base 27. HDD
22 has the same mechanism as a conventional HDD. Therefore, hereinafter, FIG. 10 and FIG. 11A are also referred to as necessary. It is assumed that the top cover 5 has been removed.

The vertical slide mechanism 26 includes the upper base 2
7 is moved in the vertical direction (the rotation axis direction of the HDD 22). The upper base 27 includes a plurality of vertical clamp mechanisms 2
5, a double-sided support mechanism 24, and a positioning actuator mechanism 11 including a positioning pin 11a are attached.

Each vertical clamp mechanism 25 clamps the HDD 22 when the upper base 27 is lowered to a predetermined position. That is, the vertical slide mechanism 26 moves the upper base 27 in the direction in which the HDD 22 exists, and the vertical clamp mechanism 25 contacts the HDD 22 and clamps it. The vertical slide mechanism 26 stops at the position where the vertical clamp mechanism 25 contacts the HDD 22. Further, a horizontal clamp mechanism (not shown) for clamping the upper base 27 at a predetermined horizontal position is attached to the apparatus, but it is omitted in FIG.

The both-end support mechanism 24 has the HDD 2 from which the top cover 5 (FIG. 10) is removed when the HDD 22 is clamped by the vertical clamp mechanism 25.
The rotating shaft 7b in 2 is held in a two-sided supported state. The positioning actuator mechanism 11 is a mechanism for positioning the head 3 in the HDD 22 at a position (on the disk 2) where servo data should be recorded. At the time of positioning, the positioning pin 11a moves the swing arm 4a.
Further, the present apparatus is provided with a clock head mechanism 23 for driving the clock head 10. The clock head 10 records a reference clock required for writing servo data on the disk 2.

The above-mentioned both-end supporting mechanism 24 is shown in FIG.
As shown in FIG. 5, the housing 24a is a mechanism body, the shaft supporting piston member 24b, the lock pin member 24c, and the spring member 24d. In the housing 24a, the shaft supporting piston member 24b is pressed in the direction of the arrow by the spring member 24d.
Further, the housing 24a is provided with a mechanism for maintaining a state in which a part of the pressed shaft supporting piston member 24b is exposed to the outside. The lock pin member 24c is a member for suppressing vertical movement of the shaft supporting piston member 24b when the shaft supporting piston member 24b is in contact with the free end of the rotary shaft 7b.

Next, the operation of this embodiment will be described. First,
As shown in FIG. 1, the HDD 22 to which servo data is written is fixed on the reference base 21. next,
By driving the vertical slide mechanism 26, the upper base 27
Moves in the direction in which the HDD 22 exists.

As the upper base 27 moves, the upper base 27
The both-end support mechanism 24 attached to the HDD approaches the HDD 22. At this time, as shown in FIG. 2A, the shaft supporting piston member 24b provided in the both-end supporting mechanism 24.
Approaches the free end of the rotary shaft 7b.

Further, as shown in FIG. 2 (B), the both-end supporting mechanism 24 moves in the direction of arrow Y1 until the shaft supporting piston member 24b sufficiently contacts with the free end of the rotary shaft 7b. To do. The tip of the shaft-supporting piston member 24b has a shape capable of sufficiently contacting the rotating shaft 7b, for example, a cylindrical shape or a conical shape. Shaft support piston member 2
When 4b contacts the rotating shaft 7b sufficiently, the spring member 24d is pressed by the reaction in the direction of arrow Y2. In this state, the vertical clamp mechanism 25
It contacts the DD 22 and clamps it (at this time, the movement of the upper base 27 stops). In this case,
As shown in (A), the shaft supporting piston member 24b in the housing 24a is kept in a state of being sufficiently in contact with the rotating shaft 7b by receiving a constant pressure from the spring member 24d.

Next, as shown in FIG. 3B, the lock pin 24c moves in the direction of the arrow X1 and presses the shaft supporting piston member 24b. This locks the movement of the shaft supporting piston member 24b. The lock pin 24c is connected to a piston of an air cylinder (not shown). The lock pin 24c may be the piston itself of the air cylinder. Air cylinder
The lock pin 24c is moved by air pressure.

In this state, the disk 2 starts to rotate by driving the spindle motor 7g provided in the disk rotating mechanism 7 in the HDD 22. The positioning actuator mechanism 11 moves the swing arm 4a with the positioning pin 11a. In this way, the positioning actuator mechanism 11 positions the head 3 at a predetermined position on the disk 2. At this time, the head moving mechanism 4
Controls the swing arm 4a to move the head 3 to the inner peripheral side of the disk 2. The positioning pin 11a controls the swing arm 4a so as to oppose the moving force of the head moving mechanism 4 in order to position the head 3. When the positioning is completed, the head 3
The servo data is written by. In addition, HD
A servo data write circuit (not shown) for writing servo data through the head 3 is provided in D22. When writing servo data, the clock head 10 records the reference clock signal on the disk 2.

During the servo data writing process,
Since the rotating shaft 7b supporting the disk 2 is sufficiently pressed by the shaft supporting piston member 24b, the both-end supporting state is maintained. Therefore, the asynchronous vibration generated on the rotary shaft 7b due to the rotational drive of the spindle motor 7g is suppressed. Moreover, the asynchronous vibration is not transmitted to the disk 2. Therefore, the servo data is written with high accuracy while the vibration component is suppressed to the minimum.

When the servo data writing process is completed,
As shown in FIG. 4A, the lock pin member 24c is moved in the direction of arrow X2 by an air cylinder (not shown). Therefore, the locked state of the shaft supporting piston member 24b is released. Then, by driving the vertical slide mechanism 26, the upper base 27 is moved in a direction away from the HDD 22. Therefore, as shown in FIG.
The both-end support mechanism 24 moves in the direction away from the rotary shaft 7b (in the direction of arrow Y3). The upper base 27 is the HDD 22
When it is sufficiently separated from the HDD 22, the HDD 22 is removed from the reference base 21. Then, the top cover 5 is attached to the HDD 22.

The above series of operations is executed by a computer (not shown) or the like provided in the servo data writing device. For example, a computer is provided with a program indicating the above processing procedure in advance. The computer controls the operation of various mechanisms such as the vertical slide mechanism 26 and the positioning actuator mechanism 11 according to the program.

Up to this point, the case where the HDD 22 is originally of the type having the rotation shaft of the both-end supporting mechanism has been described. By the way, as a supporting mechanism of a rotating shaft for supporting the disk, there is a cantilever supporting mechanism other than the both-end supporting mechanism. Therefore, a case where an HDD of a type having a rotating shaft of a cantilever support mechanism is handled may be considered. In the actual servo data writing process, a servo data writing device that can handle both of the above two types of HDDs is desired.

In the case of handling an HDD having a rotation shaft of a both-end support mechanism, the servo data writing process can be performed by the above-described operation. That is, the both-end supporting mechanism 24 having the shaft supporting piston member 24b is
It approaches the direction where the rotating shaft 7b exists. The servo data is written after the shaft supporting piston member 24b is sufficiently in contact with the rotating shaft 7b.

On the other hand, H having a rotating shaft of a cantilever support mechanism
When handling the DD, it is necessary to write the servo data in a state where the shaft supporting piston member 24b does not contact the rotating shaft 7b. In this case, the shaft supporting piston member 24b must be retracted from the rotating shaft of the cantilever support mechanism. There are the following two methods of saving. The first is a method of retracting the entire both-end support mechanism 24 including the shaft supporting piston member 24b as it is, and the second is a method of retracting only the shaft supporting piston member 24b.

According to the first method, as shown in FIG. 5A, when the HDD 22 having the rotating shaft of the cantilever support mechanism is set, the rotating shaft 7b to the shaft supporting piston member 24b are included. The entire double-sided support mechanism 24 is moved in the direction of the arrow. In this case, the retraction of the entire both-end support mechanism 24 is achieved by moving the upper base. After retracting the both-end support mechanism 24, servo data is written. According to the second method, as shown in FIG. 5B, only the shaft supporting piston member 24b is moved in the direction of the arrow from the rotating shaft 7b. That is, the shaft supporting piston member 2
4b slides in the housing 24a and stops at a predetermined position. This operation is performed by an actuator (not shown). At this time, the housing 24a itself does not move. After the shaft supporting piston member 24b is retracted, the servo data is written.

As described in detail above, according to the first embodiment,
By adopting the both-end support mechanism in the servo data writing device, as in the case of using the conventional method of attaching the dummy cover or the method of attaching the top cover provided with the opening, or more, the asynchronous generated on the rotating shaft 7b. Vibration is sufficiently suppressed. Moreover, the asynchronous vibration is not transmitted to the disk 2. Therefore, highly accurate servo data writing can be realized while minimizing the generation of vibration components.

Further, according to the first embodiment, the both-end support mechanism 24 supports the rotary shaft 7b and releases the support state according to the movement of the upper base. The positioning actuator mechanism 11 controls the position of the head 3 while the both-end supporting mechanism 24 keeps the rotating shaft 7b in a supported state.
Therefore, when the servo data writing process is performed, the complicated work of attaching / removing the dummy cover and the top cover having the opening is unnecessary. Further, it is unlikely that dust will enter the inside of the HDD 22 during operation of the servo data writing device. Further, since it is not necessary to attach / detach the cover or the like, special processing such as providing an opening in the cover or the like and a work for sealing the opening are unnecessary.

Further, the HDD 22 having the rotation shaft of the both-end support mechanism and the HDD 2 having the rotation shaft of the cantilever support mechanism.
Regardless of which of the two is set as the reference base, the state of supporting / not supporting the rotary shaft can be switched quickly and easily. Therefore, it is possible to realize an appropriate servo data writing process according to the type of the support mechanism.

Next, a second embodiment will be described. FIG. 6 is a perspective view showing the overall configuration of a servo data writing device according to the second embodiment of the present invention. The overall structure of the second embodiment is similar to that of the first embodiment shown in FIG. 1 and has common parts. Therefore, the description will focus on the components that are different from those of the first embodiment.

Also in the present apparatus according to the second embodiment, as in the case of the first embodiment, the lower base 20 of the apparatus main body and the hard disk drive (HDD) 2 to which servo data is written
It has a reference base 21 for fixing 2 and an upper base 27 of the apparatus main body. In addition, the HDD 22 is a conventional H
It has the same mechanism as DD. Therefore, hereinafter, FIG. 10 and FIG. 12A will be referred to as necessary. On the upper base 27,
A plurality of vertical clamp mechanisms 25, two-sided support mechanism 2
8 and a positioning actuator mechanism 11 having a positioning pin 11a is attached. As described in detail later, the double-end support mechanism 28 described above is different from the double-end support mechanism 24 described in the first embodiment in the object of support. The functions of the vertical clamp mechanism 25, the vertical slide mechanism 26, the positioning actuator mechanism 11, and the clock head mechanism 23 are the same as those in the first embodiment.

The above-mentioned both-end supporting mechanism 28 is used for the HDD 22.
HD with the top cover 5 (FIG. 10) removed while the vertical clamp mechanism 25 clamps the
The rotating shaft 4c in D22 is held in a two-sided supported state. As shown in FIG. 7A, the both-end support mechanism 28 includes a housing 28a as a mechanism body and a shaft support piston member 28.
b, lock pin member 28c, and spring member 28
d. In the housing 28a, the shaft supporting piston member 28b is pressed in the direction of the arrow by the spring member 28d. Also, the housing 28a
Is provided with a mechanism for maintaining a state in which a part of the pressed shaft supporting piston member 28b is exposed to the outside. The lock pin member 28c is a member for suppressing vertical movement of the shaft supporting piston member 28b when the shaft supporting piston member 28b is in contact with the free end of the rotary shaft 4c.

Next, the operation of the second embodiment will be described. First, as shown in FIG. 6, the HDD 22 to which servo data is written is fixed on the reference base 21. Then, by driving the vertical slide mechanism 26, the upper base 27 moves in the direction in which the HDD 22 exists. The operation up to this point is the same as in the case of the first embodiment.

Next, as the upper base 27 is moved, the both-end supporting mechanism 28 attached to the upper base 27 is moved to the HDD 2
Approach 2 At this time, as shown in FIG. 7A, the shaft supporting piston member 2 provided in the both-end supporting mechanism 28.
8b approaches the free end of the rotary shaft 4c.

Further, as shown in FIG. 7 (B), the both-end supporting mechanism 28 moves in the direction of arrow Y1 until the shaft supporting piston member 28b is sufficiently in contact with the free end of the rotary shaft 4c. To do. The tip portion of the shaft supporting piston member 28b has a shape capable of sufficiently contacting the rotating shaft 4c, for example, a columnar shape or a conical shape. Shaft support piston member 2
When 8b contacts the rotating shaft 4c sufficiently, the spring member 28d is pressed by the reaction in the direction of the arrow Y2. In this state, the vertical clamp mechanism 25
It contacts the DD 22 and clamps it (at this time, the movement of the upper base 27 stops). In this case,
As shown in (A), the shaft supporting piston member 28b in the housing 28a is kept in a state of being sufficiently in contact with the rotating shaft 4c by receiving a constant pressure from the spring member 28d.

In this state, as shown in FIG. 8B, the lock pin 28c presses the shaft supporting piston member 28b in the direction of arrow X1. This locks the movement of the shaft supporting piston member 28b. The lock pin 28c is connected to a piston of an air cylinder (not shown). The lock pin 28c may be the piston itself of the air cylinder. The air cylinder moves the lock pin 28c by air pressure.

Next, the disk rotating mechanism 7 in the HDD 22
By driving the spindle motor 7g provided in the disk 2, the disk 2 starts to rotate. The positioning actuator mechanism 11 moves the swing arm 4a with the positioning pin 11a. In this way, the positioning actuator mechanism 11 positions the head 3 at a predetermined position on the disk 2. At this time, the head moving mechanism 4 moves the head 3 to the inner peripheral side or the outer peripheral side of the disk 2 by controlling the swing arm 4a. Positioning pin 11
In order to position the head 3, a controls the swing arm 4a so as to oppose the moving force of the head moving mechanism 4. When the positioning is completed, the head 3 writes the servo data. In addition, HDD2
The head 2 is provided with a servo data writing circuit (not shown) for writing servo data through the head 3. When writing servo data,
A reference clock signal is recorded on the disk 2 by the clock head 10.

While performing the servo data writing process,
Since the rotary shaft 4c supporting the swing arm 4a is sufficiently pressed by the shaft supporting piston member 28b, the both-supported state is maintained. Therefore, the asynchronous vibration generated on the rotary shaft 4c due to the rotational driving of the spindle motor 7g is suppressed. Also, the swing arm 4a
Asynchronous vibration is not transmitted to. Therefore, the servo data is written with high precision while the generation of the vibration component is suppressed to the minimum.

When the servo data writing process is completed,
As shown in FIG. 9A, the lock pin member 28c is moved in the direction of arrow X2 by an air cylinder (not shown). Therefore, the locked state of the shaft supporting piston member 28b is released. Then, by driving the vertical slide mechanism 26, the upper base 27 is moved in a direction away from the HDD 22. Therefore, as shown in FIG.
The both-end support mechanism 28 moves in the direction away from the rotary shaft 4c (in the direction of arrow Y3). The upper base 27 is the HDD 22
When it is sufficiently separated from the HDD 22, the HDD 22 is removed from the reference base 21. Then, the top cover 5 is attached to the HDD 22.

As in the case of the first embodiment, the series of operations described above is executed by a computer (not shown) or the like provided in the servo data writing device. As is apparent from the above description of the operation, the operating principle of the both-end supporting mechanism 28 is almost the same as the operating principle of the both-end supporting mechanism 24 in the first embodiment. However, the both-end support mechanism 28 is different from the both-end support mechanism 24 in the object of support. In particular, the both-end support mechanism 28 supports the rotating shaft 4c,
It acts so as not to transmit vibration to the swing arm 4a supporting the head 3. Therefore, the both-end support mechanism 28 prevents the disk 2 from vibrating.
Has a different action.

Further, the servo data writing device according to the second embodiment can handle the HDD of the type having the rotating shaft of the cantilever support mechanism as in the case of the first embodiment.
Regarding the method of retracting the shaft supporting piston member from the rotating shaft 4c, the first method of retracting the entire both-end supporting mechanism 28 including the supporting piston member 28b as it is,
There is a second method of retracting only the shaft supporting piston member 28b. The operation principle of evacuation is shown in FIG. 5 of the first embodiment.
It is similar to that shown in (A) and (B).

As described in detail above, according to the second embodiment,
Asynchronous vibration generated in the rotating shaft 4c is sufficiently suppressed as in the case of using the conventional method of attaching the dummy cover or the method of attaching the top cover having the opening. Moreover, the asynchronous vibration is not transmitted to the swing arm 4 or the head 3. Therefore, highly accurate servo data writing with a minimum vibration component is realized.

Further, according to the second embodiment, when the servo data writing process is performed, the complicated work of attaching / detaching the dummy cover and the top cover having the opening is unnecessary. Also, during operation of the servo data writing device,
A situation in which dust is mixed in the HDD 22 is unlikely to occur. Further, since it is not necessary to attach / detach the cover or the like, special processing such as providing an opening in the cover or the like and a work for sealing the opening are unnecessary.

Further, the HDD 22 having the rotation shaft of the both-end support mechanism and the HDD 2 having the rotation shaft of the cantilever support mechanism.
Regardless of which of the two is set as the reference base, the state of supporting / not supporting the rotary shaft can be switched quickly and easily. Therefore, it is possible to realize an appropriate servo data writing process according to the type of the support mechanism.

[0058]

As described above in detail, according to the first aspect of the present invention, by supporting the rotary shaft that supports the disk,
Asynchronous vibration can be prevented from being transmitted to the disk when writing servo data. On the other hand, according to the second aspect of the invention, since the rotary shaft that supports the swing arm is supported, asynchronous vibration is not transmitted to the swing arm when writing servo data. Therefore, by combining the first invention and the second invention, highly accurate servo data writing can be realized more reliably. In this case, the both-end supporting mechanism according to the first invention and the both-end supporting mechanism according to the second invention are provided on the same upper base. As a result, when writing servo data,
Both the rotary shaft supporting the disc and the rotary shaft supporting the swing arm can be simultaneously supported.

[Brief description of drawings]

FIG. 1 is a perspective view showing the overall configuration of a servo data writing device according to a first embodiment of the invention.

FIG. 2 is a side sectional view showing how the both-end support mechanism contacts the rotating shaft that supports the disc in the embodiment.

FIG. 3 is a side sectional view showing a manner in which the both-end support mechanism that is in contact with the rotation shaft that supports the disk is locked in the embodiment.

FIG. 4 is a side sectional view showing how the both-end support mechanism retracts from the rotary shaft that supports the disk in the embodiment.

FIG. 5 is a side sectional view showing how the both-end support mechanism or the piston retracts from the rotary shaft of the cantilever spindle motor in the embodiment.

FIG. 6 is a perspective view showing the overall configuration of a servo data writing device according to a second embodiment of the invention.

FIG. 7 is a side sectional view showing a manner in which the both-end support mechanism comes into contact with a rotary shaft that supports a swing arm in the embodiment.

FIG. 8 is a side sectional view showing a manner in which the both-end support mechanism that is in contact with the rotary shaft that supports the swing arm is locked in the embodiment.

FIG. 9 is a side sectional view showing how the both-end support mechanism retracts from the rotary shaft that supports the swing arm in the embodiment.

FIG. 10 is a perspective view showing the configuration of a normal HDD.

FIG. 11 is a side sectional view showing the periphery of a disk rotation mechanism inside a normal HDD.

FIG. 12 is a side sectional view showing the periphery of a head moving mechanism inside a normal HDD.

FIG. 13 is a perspective view showing how servo data is written to a disk according to a conventional technique.

FIG. 14 is a perspective view showing a state in which a rotary shaft is supported by attaching a dummy cover in the conventional technique.

FIG. 15 is a perspective view showing a state in which a rotary shaft is supported by attaching a top cover having an opening according to a conventional technique.

[Explanation of symbols]

1 ... Case, 2 ... Disk, 3 ... Head, 3a ... Suspension, 4 ... Head moving mechanism, 4a ... Swing arm, 4b ... Voice coil motor, 4c ... Rotation axis, 4d ...
Bearing, 4e ... Screw hole, 5 ... Top cover, 6 ... Fixing screw, 7 ... Disk rotating mechanism, 7a ... Disk holding member, 7b ... Rotating shaft, 7c ... Bearing, 7d ... Screw hole, 7e ... Hub, 7f ... Spacer ring, 7g ... Spindle motor, 10 ... Clock head, 10a ... Suspension, 11 ... Positioning actuator mechanism, 11a ...
Positioning pins, 12 ... Dummy cover, 12a ... Fixing screws, 13a, 13b ... Openings, 20 ... Lower base, 21 ...
Standard base, 22 ... Hard disk drive (HDD), 2
3 ... Clock head mechanism, 24, 28 ... Both-end supporting mechanism, 24a, 28a ... Housing, 24b, 28b ... Shaft supporting piston member, 24c, 28c ... Lock pin member, 24d, 28d ... Spring member, 25 ... Vertical direction Clamp mechanism, 26 ... Vertical slide mechanism, 27 ... Upper base.

Claims (26)

[Claims] 1. Servo data writing in a magnetic disk device comprising a rotating mechanism for rotating a recording medium, a head mechanism for writing servo data as positioning information on the recording medium, and a carriage mechanism for moving the head mechanism. A device for fixing the magnetic disk device, a head positioning means for positioning the head mechanism, and a recording medium of the recording medium for suppressing vibration generated due to a rotating operation of the rotating mechanism. A first support means for supporting the free end of the rotary shaft; and a second support means for supporting the free end of the rotary shaft of the carriage mechanism so as to suppress vibrations caused by the rotating operation of the rotary mechanism. A servo data writing device characterized by being provided. 2. The first supporting means has a piston mechanism for supporting a free end of a rotary shaft of the recording medium and a lock mechanism for fixing movement of the piston mechanism. 1. The servo data writing device according to 1. 3. The piston mechanism includes: a piston; a cylinder that slidably accommodates the piston; a spring that presses the piston in a direction in which the rotating shaft exists; When the servo data is written, the piston is moved to abut the free end of the rotation shaft of the recording medium, and when the magnetic disk device has a cantilevered support mechanism, the piston is moved when the servo data is written. The servo data writing device according to claim 2, further comprising a moving mechanism that retracts the piston to a predetermined position in the cylinder so as not to contact the free end of the rotation shaft of the recording medium. 4. When the magnetic disk device has a double-sided supporting mechanism, the first disk is used when writing the servo data.
When the magnetic disk device has a cantilevered support mechanism by moving the supporting means to contact the free end of the rotation shaft of the recording medium, the first supporting means rotates the recording medium when the servo data is written. 2. The servo data writing device according to claim 1, further comprising a moving unit that retracts to a predetermined position so as not to contact the free end of the shaft. 5. When the magnetic disk device has a both-end supporting mechanism, the first disk is used when writing the servo data.
When the magnetic disk device has a cantilevered support mechanism by moving the supporting means to contact the free end of the rotation shaft of the recording medium, the first supporting means rotates the recording medium when the servo data is written. 3. The servo data writing device according to claim 2, further comprising moving means for retracting the shaft to a predetermined position so as not to contact the free end of the shaft. 6. A servo data writing method for a magnetic disk device, comprising: a rotation mechanism for rotating a recording medium; a head mechanism for writing servo data as positioning information on the recording medium; and a carriage mechanism for moving the head mechanism. A device for fixing the magnetic disk device, a head positioning means for positioning the head mechanism, and a recording medium of the recording medium for suppressing vibration generated due to a rotating operation of the rotating mechanism. A first support means for supporting the free end of the rotary shaft, the first support means for fixing the movement of the piston mechanism and the piston mechanism for supporting the free end of the rotary shaft of the recording medium. Servo data writing device having a lock mechanism of. 7. The piston mechanism includes: a piston; a cylinder that slidably accommodates the piston; a spring that presses the piston in a direction in which the rotation shaft exists; When the servo data is written, the piston is moved to abut the free end of the rotation shaft of the recording medium, and when the magnetic disk device has a cantilevered support mechanism, the piston is moved when the servo data is written. The servo data writing device according to claim 6, further comprising: a moving mechanism that retracts the piston to a predetermined position in the cylinder so as not to contact the free end of the rotation shaft of the recording medium. 8. When the magnetic disk device has a both-end supporting mechanism, the first disk is used when writing the servo data.
When the magnetic disk device has a cantilevered support mechanism by moving the supporting means to contact the free end of the rotation shaft of the recording medium, the first supporting means rotates the recording medium when the servo data is written. 7. The servo data writing device according to claim 6, further comprising a moving unit that retracts to a predetermined position so as not to contact the free end of the shaft. 9. A servo data writing device for a magnetic disk device, comprising: a rotating mechanism for rotating a recording medium; a head mechanism for writing servo data as positioning information on the recording medium; and a carriage mechanism for moving the head mechanism. A device for fixing the magnetic disk device, a head positioning means for positioning the head mechanism, and a recording medium of the recording medium for suppressing vibration generated due to a rotating operation of the rotating mechanism. When the magnetic disk device has a both-end supporting mechanism for supporting the free end of the rotary shaft, the first supporting means is moved during the writing of the servo data to freely rotate the rotary shaft of the recording medium. When the magnetic disk device has a cantilevered support mechanism,
A servo data writing apparatus comprising: a moving unit that retracts the first supporting unit to a predetermined position so as not to contact the free end of the rotation shaft of the recording medium when writing the servo data. 10. A servo data writing device for a magnetic disk device, comprising: a rotating mechanism for rotating a recording medium; a head mechanism for writing servo data as positioning information on the recording medium; and a carriage mechanism for moving the head mechanism. A device for fixing the magnetic disk device, a head positioning means for positioning the head mechanism, and a carriage mechanism for suppressing vibration generated due to a rotating operation of the rotating mechanism. A servo data writing device, comprising: a second supporting means for supporting a free end of the rotating shaft. 11. The second support means has a piston mechanism for supporting a free end of a rotation shaft of the carriage mechanism and a lock mechanism for fixing movement of the piston mechanism. 10. The servo data writing device according to item 10. 12. The piston mechanism includes: a piston; a cylinder that slidably accommodates the piston; a spring that presses the piston in a direction in which the rotating shaft exists; When the servo data is written, the piston is moved to abut the free end of the rotation shaft of the carriage mechanism.
When the magnetic disk device has a cantilever support mechanism, a moving mechanism that retracts the piston to a predetermined position in the cylinder so as not to contact the free end of the rotation shaft of the carriage mechanism when writing the servo data. The servo data writing device according to claim 11, further comprising: 13. When the magnetic disk device has a both-end support mechanism, the second support means is moved to contact the free end of the rotation shaft of the carriage mechanism when writing the servo data, When the device has a cantilevered support mechanism, it further comprises a moving means for retracting the second support means to a predetermined position so as not to contact the free end of the rotation shaft of the carriage mechanism when writing the servo data. The servo data writing device according to claim 10. 14. When the magnetic disk device has a both-end support mechanism, the second support means is moved so as to contact the free end of the rotation shaft of the carriage mechanism when writing the servo data, When the device has a cantilevered support mechanism, it further comprises a moving means for retracting the second support means to a predetermined position so as not to contact the free end of the rotation shaft of the carriage mechanism when writing the servo data. The servo data writing device according to claim 11. 15. A servo system in a magnetic disk device comprising a rotating mechanism for rotating a recording medium, a head mechanism for writing servo data as positioning information on the recording medium, and a carriage mechanism for moving the head mechanism. Is a servo data writing method for writing at a predetermined position on the recording medium, wherein the step of fixing the magnetic disk device, the step of positioning the head mechanism, and the vibration generated by the rotating operation of the rotating mechanism are performed. In order to suppress the above, the first support of the free end of the rotation shaft of the recording medium by the piston mechanism, the step of fixing the movement of the piston mechanism, and the vibration caused by the rotation operation by the rotation mechanism. So that the free end of the rotary shaft of the carriage mechanism is secondly supported so that Servo data writing method characterized by having a flop. 16. The first supporting step comprises a step of forming the piston mechanism by accommodating a slidable piston and a spring for pressing the piston in a cylinder; If the magnetic disk device has a cantilevered support mechanism, the piston is moved to contact the free end of the rotary shaft of the recording medium when the servo data is written. 16. The servo data writing method according to claim 15, further comprising the step of: retreating to a predetermined position in the cylinder so as not to contact the free end of the rotation shaft of the recording medium. 17. A servo system in a magnetic disk device comprising a rotating mechanism for rotating a recording medium, a head mechanism for writing servo data as positioning information on the recording medium, and a carriage mechanism for moving the head mechanism. Is a servo data writing method for writing at a predetermined position on the recording medium, wherein the step of fixing the magnetic disk device, the step of positioning the head mechanism, and the vibration generated by the rotating operation of the rotating mechanism are performed. To support the free end of the rotating shaft of the recording medium by a piston mechanism first, and to suppress vibration generated due to the rotating operation of the rotating mechanism, the rotating shaft of the carriage mechanism. Secondly supporting the free end of the magnetic disk device, If if it has, the abutted against the free end of the rotating shaft of the servo data writing said recording medium said piston mechanism is moved up, wherein the magnetic disk device has a support mechanism cantilevered
And a step of retracting the piston mechanism to a predetermined position so as not to contact the free end of the rotation shaft of the recording medium when writing the servo data. 18. When the magnetic disk device has a both-end support mechanism, the piston mechanism is moved so as to contact the free end of the rotation shaft of the recording medium when the servo data is written, 16. When the device has a cantilever support mechanism, the method further comprises the step of retracting the piston mechanism to a predetermined position so as not to contact the free end of the rotation shaft of the recording medium when writing the servo data. Servo data writing method described in. 19. A magnetic disk device comprising a rotating mechanism for rotating a recording medium, a head mechanism for writing servo data as positioning information on the recording medium, and a carriage mechanism for moving the head mechanism. Is a servo data writing method for writing at a predetermined position of the recording medium, wherein the step of fixing the magnetic disk device, the step of positioning the head mechanism, and the vibration generated by the rotating operation of the rotating mechanism In order to suppress the above, a servo data writing method comprising: first supporting a free end of a rotation shaft of the recording medium by a piston mechanism; and fixing a movement of the piston mechanism. 20. The first supporting step comprises a step of configuring the piston mechanism by accommodating a slidable piston and a spring for pressing the piston in a cylinder; and the magnetic disk device comprising a both-end supporting mechanism. If the magnetic disk device has a cantilevered support mechanism, the piston is moved to contact the free end of the rotary shaft of the recording medium when the servo data is written. 20. The servo data writing method according to claim 19, further comprising the step of retracting to a predetermined position in the cylinder so as not to contact the free end of the rotation shaft of the recording medium. 21. When the magnetic disk device has a both-end supporting mechanism, the piston mechanism is moved to contact the free end of the rotation shaft of the recording medium when the servo data is written, 20. When the device has a cantilever support mechanism, the method further comprises the step of retracting the piston mechanism to a predetermined position so as not to contact the free end of the rotation shaft of the recording medium when writing the servo data. Servo data writing method described in. 22. A magnetic disk drive comprising a rotating mechanism for rotating a recording medium, a head mechanism for writing servo data as positioning information on the recording medium, and a carriage mechanism for moving the head mechanism. Is a servo data writing method for writing at a predetermined position on the recording medium, wherein the step of fixing the magnetic disk device, the step of positioning the head mechanism, and the vibration generated by the rotating operation of the rotating mechanism are performed. To support the free end of the rotation shaft of the recording medium, and when the magnetic disk device has a both-end supporting mechanism, the piston mechanism is moved during the servo data writing to The magnetic disk device has a cantilevered support mechanism that is brought into contact with the free end of the rotating shaft. If it is,
And a step of retracting the piston mechanism to a predetermined position so as not to contact the free end of the rotation shaft of the recording medium when writing the servo data. 23. A servo system in a magnetic disk device comprising a rotating mechanism for rotating a recording medium, a head mechanism for writing servo data as positioning information on the recording medium, and a carriage mechanism for moving the head mechanism. Is a servo data writing method for writing at a predetermined position of the recording medium, wherein the step of fixing the magnetic disk device, the step of positioning the head mechanism, and the vibration generated by the rotating operation of the rotating mechanism The servo data writing method comprises the steps of supporting the free end of the rotary shaft of the carriage mechanism by a piston mechanism so as to suppress the above, and fixing the movement of the piston mechanism. 24. The supporting step comprises a step of configuring the piston mechanism by accommodating a slidable piston and a spring for pressing the piston in a cylinder; and, in the case where the carriage mechanism has a both-end supporting mechanism, ,
When the servo data is written, the piston is moved to abut the free end of the rotation shaft of the carriage mechanism, and when the carriage mechanism has a cantilever support mechanism, the piston is moved to the carriage mechanism when writing the servo data. The servo data writing method according to claim 23, further comprising a step of retracting to a predetermined position in the cylinder so as not to contact a free end of the rotation shaft. 25. A magnetic disk drive comprising a rotating mechanism for rotating a recording medium, a head mechanism for writing servo data as positioning information on the recording medium, and a carriage mechanism for moving the head mechanism. Is a servo data writing method for writing at a predetermined position of the recording medium, wherein the step of fixing the magnetic disk device, the step of positioning the head mechanism, and the vibration generated by the rotating operation of the rotating mechanism In order to suppress the above, a step of supporting the free end of the rotary shaft of the carriage mechanism by a piston mechanism;
When writing the servo data, the piston mechanism is moved to abut on the free end of the rotary shaft of the carriage mechanism,
When the carriage mechanism has a cantilever support mechanism,
And a step of retracting the piston mechanism to a predetermined position so as not to contact the free end of the rotation shaft of the carriage mechanism when the servo data is written. 26. When the carriage mechanism has a both-end support mechanism, the piston mechanism is moved so as to abut against a free end of a rotation shaft of the carriage mechanism when the servo data is written, and the carriage mechanism is cantilevered. 24. The method according to claim 23, further comprising a step of retracting the piston mechanism to a predetermined position so as not to contact a free end of a rotation shaft of the carriage mechanism when the servo data is written when the support mechanism is provided. Servo data writing method.