JPH04172618A - Disk inspecting apparatus - Google Patents

Abstract

PURPOSE:To efficiently inspect a disk by providing a disk inspecting unit for inspecting defects of the disk and a cleaning disk for cleaning an inspecting means of the unit, and automatically inspecting the disk and cleaning the disk inspecting unit. CONSTITUTION:This apparatus is provided with a disk feed stocker 1 in which cartridges accommodating disks to be inspected are housed, disk inspecting units 2a, 2b which can inspect defects of disks in the cartridges, a cleaning disk feed stocker 3 accommodating a cleaning disk for cleaning an inspecting means of the units, a feed unit 5 for feeding disks and a discharge unit 6. The magnetic disks are automatically inspected. When magnetic heads in the disk inspecting units 2a, 2b become dirty in accordance with the progress of the inspection, the magnetic heads are automatically cleaned. Therefore, the magnetic disks can be inspected considerably efficiently.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to an inspection device for a disk such as a magnetic disk, for example.

[Background of the invention]

For detecting defects in disks such as magnetic disks, the following defect detection method is generally used, for example. (1) Average signal amplitude 80% or more and 130% or less of the standard signal amplitude (2) Mincing pulse Pulse that is 45% or less of the trunk average signal amplitude (3) The amplitude after extra pulse cancellation is the trunk average signal amplitude 1/2 of 20
% or more pulse (4) Modulation Trunk Anomaly of positive or negative amplitude modulation of 10% or more with respect to average signal amplitude By the way, various types of inspection devices have been proposed for inspecting disk defects (Japanese Patent Application Laid-Open No. 1983-1999- No. 167106,
JP-A-62-192023, JP-A-62-19291
No. 0, JP-A-6331080, JP-A-63-3108
No. 1) has been done. However, detecting defects in disks using conventional inspection devices is time consuming and costly.

[Disclosure of the invention]

An object of the present invention is to provide a disk inspection device that can inspect disks easily and at low cost. The objects of the present invention are to provide a disk supply stocker for storing disks to be inspected, a disk inspection unit for inspecting disks for defects, and a cleaning disk supply stocker for containing cleaning disks for cleaning the inspection means of this disk inspection unit. , an inspected disk storage stocker for storing inspected disks, a supply unit for transporting the disks from the disk supply stocker to the disk inspection unit, and a discharge unit for transporting the inspected disks from the inspection unit to the inspected disk storage stocker. This is achieved by a disk inspection device characterized by having a unit. Also, a disk supply store 7 for storing disks to be inspected.
a disk inspection unit for inspecting disks for defects; a cleaning disk supply stocker for storing cleaning disks for cleaning the inspection means of the disk inspection unit; and an inspected disk storage stocker for storing inspected disks; A supply unit that transports discs from the disc supply stocker to the disc inspection unit, an ejection unit that transports the inspected discs from the inspection unit to the inspected disc storage stocker, and an inspection means of the disc inspection unit require cleaning. If it is determined that this is the case, cleaning is performed using the cleaning disk, and then when the disk is inspected by the disk inspection unit, it is determined that the inspection means of the disk inspection unit needs to be cleaned again, and this is performed as specified. This is achieved by a disk inspection apparatus characterized in that it is equipped with a control means for stopping the inspection by the disk inspection unit when the inspection is repeated the number of times.

【Example】

FIG. 1 and FIG. 2 show one example of a disk inspection device according to the present invention.
An embodiment is shown in which FIG. 1 is a schematic diagram of the main parts of a disk inspection device, and FIG. 2 is a flowchart of inspection by the disk inspection device. In each figure, 1 is a disk supply stocker in which a cartridge (not shown) containing a disk to be inspected is stored. Reference numerals 2a and 2b are disk inspection units that can inspect the disks in the cartridge for defects, and these disk inspection units 2a and 2b are provided with various mechanisms in addition to a magnetic head and a disk drive means. The mechanism of these disk inspection units 2a and 2b is as follows.
Since various methods have been proposed so far, detailed explanations will be omitted. Further, in this embodiment, only two disk inspection units are shown, but there may be any number of them. Reference numeral 3 denotes a cleaning disk supply stocker that stores a cartridge and a cartridge (not shown) in which cleaning disks for cleaning the magnetic heads of the disk inspection units 2a and 2b are stored. Reference numeral 4a denotes a non-defective A stocker 7 car that stores the non-defective discs that have been inspected by the disc inspection units 2a and 2b and have passed the inspection, and this non-defective A stocker 4a is provided at the bottom of the disc inspection unit 2a. Reference numeral 4b denotes a non-defective B stocker for storing non-defective discs that have been inspected by the disc inspection units 2a and 2b and have passed B, and this non-defective B stocker 4b is provided at the bottom of the disc inspection unit 2b. 4c is a defective product stocker that stores defective disks that have been inspected by the disk inspection units 2a and 2b and have not passed, as well as cleaning disk cartridges used for cleaning. It is located at the bottom. 5 is a disk supply stocker, from the car 1 and the cleaning disk supply stocker 3 to the disk inspection unit 2a;
There is a supply unit 2b for transporting a disk cartridge or a cleaning disk cartridge, and this supply unit 5 has a recess formed in the rear wall of a cartridge containing a disk to be inspected or a cartridge containing a cleaning disk. A cartridge chuck mechanism is constructed. 6, the disks inspected by the disk inspection units 2a and 2b and the cleaning disks used for cleaning are transferred from the disk inspection units 2a and 2b to non-defective products A.
There is a discharge unit that transports the cartridges to the stocker 4a, the good product B stocker 4b, or the defective product stocker 40.The discharge unit 6 includes a cartridge containing the inspected disk, a cartridge containing the cleaning disk, and a rear wall of the cartridge. A cartridge chuck mechanism is configured to grip the formed recess. 7 is a conveyance guide rail for the supply unit 5 and the discharge unit 6; 8a and 8b are drive motors for horizontal movement of the supply unit 5 and the discharge unit 6; 9 is a stage to which the conveyance guide rail 7 and the like are attached; 10 is a stage 9 is a guide rail for moving the stage 9; 11 is a drive motor for moving the stage 9; Although not shown in FIG. 1, this disk inspection apparatus is provided with a control device. This control device performs various types of control, and as one of the controls, for example, the disk inspection units 2a, 2
If it is determined that cleaning of the M1 head is necessary during the disk inspection by b, a cleaning disk cartridge is supplied to the magnetic heads of these disk inspection units 2a and 2b, and the cleaning disk performs cleaning of the magnetic head. Disk inspection is performed by the rear disk inspection units 2a and 2b, and at this time, if it is determined that the magnetic head needs to be cleaned again, or if such a determination is made several times in succession. In this case, the disk inspection units 2a and 2b have a function of stopping (prohibiting) the inspection by the disk inspection units 2a and 2b. Next, the operation of the disk inspection apparatus constructed as described above will be explained with reference to FIG. 2 as follows. First, the power is turned on and the control device is initialized. These initial settings include, for example, how many discs (T) are to be inspected, what are the disc inspection standards, etc.
How many disk inspection units (S) are there, under what conditions does the magnetic head need to be cleaned, and whether disk inspection units 2a and 2b should be discontinued?
Prohibited) Criteria (If the magnetic head is cleaned, then the disk is inspected by the E units 2a and 2b, and it is determined that the magnetic head needs to be cleaned again during this disk inspection. criteria for stopping (prohibiting) the use of the disk inspection units 2a and 2b), and other C-
Conditions such as 0, N=O1CN=O are input. After the second initial setting, the operation is started, and the cartridge chuck mechanism of the supply unit 5 and discharge unit 7 is retracted into the supply unit 5 and discharge unit 6 to return to the origin).
The stage 9 rises, and the ejection unit 6 reaches a height corresponding to the position of the disk inspection units 2a, 2b. Then, the ejection unit 6 operates for the disk inspection units 2a and 2b, and the disk inspection units 2a and 2b
The cartridge chuck mechanism operates regardless of whether there is a disc cartridge (including a cleaning disc cartridge) inside, and if there is a disc cartridge, it grips it and stores it in the ejection unit 6 (return to origin). . After this, the stage 9 descends, the ejection unit 6 reaches a height corresponding to the position of the defective product stocker 40, and the disk cartridge is placed in the defective product stocker 40, whether or not it is held by the cartridge chuck mechanism. A discharging operation is performed for the discharge operation. Furthermore, prior to this discharge operation, the defective product stocker 4c is set to FL! A check is made to see if the defective product stocker 40 is in the LL state, and if the defective product stocker 40 is in the FLi I-L state, a signal to that effect is output, the ejection operation is stopped, and the defective product stocker 40 is in the LL state. ) 7 cars 40 are exchanged. On the other hand, if cleaning of the magnetic head is necessary depending on whether or not cleaning of the magnetic heads of the disk inspection units 2a and 2b is necessary (cleaning is always performed since C-=0 when starting the inspection by this inspection device). At this time, the supply unit 5 grips the cleaning disk cartridge with its cartridge chuck mechanism, and the cleaning operation is performed. Note that this cleaning work is performed for the number of disk inspection units 2a and 2b. Thereafter, the cartridge chuck mechanism is retracted into the supply unit 5 and the ejection unit 6, and the stage 9 is raised, so that the ejection unit 7 becomes at a height corresponding to the position 2 of the disk inspection units 2a and 2b. Then, if count N<S, the above operation is repeated. By the way, when the above-mentioned magnetic head cleaning operation is completed and cleaning of the magnetic heads of the disk inspection units 2a and 2b is no longer necessary, the supply unit 5 is inspected from the disk supply stocker 1 using its cartridge chuck mechanism. The cartridge containing the disc to be processed is gripped and loaded into the disc inspection units 2a, 2b, and the disc inspection units 2a, 2b perform an inspection. During the inspection by the disk inspection units 2a and 2b,
The presence or absence of a cartridge containing a disc is checked in the disc inspection unit 2a, 2b, and if a cartridge containing a disc is present, the disc in the disc supply stocker 1 is next stored. The presence or absence of the loaded cartridge is checked. Here, if there is no cartridge 7 containing a disc in the disc supply stocker 1, a signal to that effect is output, and cartridges are replenished. If there is a cartridge containing a disc in the disc supply stocker 1, the process moves directly to the next one. Note that these determinations are completed during the disk inspection time. During the inspection, the stage 9 is raised and the ejection unit 7 6 corresponds to the position of the disk inspection units 2a and 2b, so after the inspection is completed, the ejection unit 6 grips the disk cartridge with its cartridge chunk mechanism, Then, the cartridge chuck mechanism is retracted into the ejection unit 6, and the stage 9 is lowered. Then, based on the inspection results of the disk inspection units 2a and 2b, the disks are discharged to a predetermined non-defective A stocker 4a, non-defective B stocker 4b, or defective stocker 40. At this time, a check is made to see if the non-defective product A stocker, car 4a1 non-defective product B stocker 4b, or defective product stocker 40 is in the FULL state, and if it is in the FULL state, a signal to that effect is sent. is output, and the discharge operation is temporarily stopped until the stocker replacement is completed. On the other hand, the supply unit 5 includes a disk inspection unit 2a,
Based on the determination as to whether or not the cleaning of the magnetic head is necessary in step 2b, if cleaning is necessary, the cleaning disk cartridge is gripped by the cartridge chunk mechanism and the cleaning operation is performed. Based on the determination of whether or not cleaning of the magnetic throats of the disk inspection units 2a and 2b is necessary, if cleaning is not necessary, the cartridge chunk mechanism grips the cartridge containing the disk to be inspected from the disk supply stocker 1. and disk inspection units 2a, 2
b, then continue to the disk inspection unit) 2a, 2b.
The inspection will be carried out. After the disk inspection units 2a and 2b start the inspection, the cartridge chunk mechanism is operated by the supply unit 5,
Further, the discharge unit 6 is retracted (returns to the origin), and the stage 9 is raised. During this time, the disk inspection unit 2a, 2b performs an inspection and determines whether or not cleaning is necessary.
If it is determined that cleaning of the magnetic nozzle is necessary, the supply unit 5 grips the cleaning disk cartridge with its cartridge chuck m structure, and the cleaning operation is performed. The necessity of cleaning is determined based on the determination result of the average signal amplitude in the inspection item, and when a predetermined number of magnetic disks are consecutively detected as having a defective average signal amplitude, it is determined that head cleaning is necessary. This is because, due to the characteristics of magnetic disks, continuous detection of defective disks such as missing pulses, extra pulses, and modulation syncs is observed, but continuous occurrence of average signal amplitude defects is rare, and there is a high probability that the magnetic head is contaminated. be. By the way, such disk inspection units 2a and 2b
The fact that the cleaning of the magnetic head is continued several times in succession does not mean that cleaning is necessary due to a problem with the disk itself, but rather that there is a problem with the magnetic heads of the disk inspection units 2a and 2b. Therefore, when such a situation occurs, the use of this disk inspection unit is stopped (prohibited). If it is determined that there is no cartridge containing a disk in the disk inspection units 2a, 2b, the disk inspection ends. In this way, according to the disk inspection device of the above embodiment,
The inspection of the magnetic disk is performed automatically, and as the inspection progresses, the magnetic heads of the disk inspection units 2a and 2b become dirty, and the inspection cannot be performed accurately. Since the magnetic head is automatically cleaned, magnetic disks can be inspected extremely efficiently, and inspection costs can be reduced. Moreover, if the cleaning of the magnetic heads of the disk inspection units 2a, 2b occurs several times in succession, in this case, the use of the disk inspection units 2a, 2b is stopped, so cleaning is not done in vain, and unnecessary work is eliminated. This allows inspection of magnetic disks to be performed extremely efficiently and reduces inspection costs. Although not explained in the above embodiment, if an alignment disk is used instead of the cleaning disk, the positions of the magnetic heads of the disk inspection units 2a and 2b can be automatically inspected. Of course, both the cleaning disk and the alignment disk may be used.

【effect】

The disk inspection device according to the present invention includes a disk supply stocker that stores disks to be inspected, a disk inspection unit that inspects disks for defects, a cleaning disk that cleans the inspection means of this disk inspection unit, and a disk that has been inspected. An inspected disk storage stocker for storing disks, a supply unit for conveying disks from the disk supply stocker to a disk inspection unit, and an ejection unit for conveying inspected disks from the inspection unit to the inspected disk storage stocker. Therefore, the disk inspection is performed automatically, and as the inspection progresses, the inspection means of the disk inspection unit gets dirty and the inspection cannot be performed accurately.
At this time, since the disk inspection unit is automatically cleaned, disk inspection can be carried out extremely efficiently, and inspection costs can be reduced. Further, the disk inspection device according to the present invention houses a disk supply stocker for storing disks to be inspected, a disk inspection unit for inspecting disk defects, and a cleaning disk for cleaning the inspection means of this disk inspection unit. A cleaning disk supply stocker, an inspected disk storage stocker for storing inspected disks, a supply unit for transporting disks from the disk supply stocker to a disk inspection unit, and an inspected disk storage stocker for transferring inspected disks from the inspection unit. If it is determined that cleaning is necessary for the ejecting unit conveyed to the storage unit and the inspection means of the disk inspection unit, cleaning is performed using the cleaning disk, and after that, when the disk inspection unit carries out the disk inspection, the disk inspection unit and a control means for stopping the inspection by the disk inspection unit when it is determined that the inspection means needs to be cleaned again and this is repeated a predetermined number of times, so that the inspection of the disk is stopped. This is done automatically, and as the inspection progresses, the inspection means of the disk inspection unit gets dirty and the inspection cannot be performed accurately.In this case, the disk inspection unit is automatically cleaned, so the disk inspection can be performed extremely efficiently, reducing inspection costs, and in addition, if the disk inspection unit is cleaned several times in a row, the disk inspection unit is stopped from being used, so there is no need to clean it unnecessarily. This method has the following advantages: unnecessary work is omitted, disk inspection can be performed more efficiently, and inspection costs can be further reduced.

[Brief explanation of drawings]

FIGS. 1 and 2 show disk inspection 1 according to the present invention...
Disc supply stocker, 2a, 2b... Disc inspection knee knit, 3... Cleaning disc supply stocker, 4a... Good product A
Stocker, 4b... Good product B stock 7 cars, 4c... Defective product stocker, 5... Supply unit,
6... Discharge unit, 7... Guide rail, 8a,
8b... Drive motor, 9... Stage, 10...
・Guide rail, 11... Drive motor.

Claims (2)

[Claims] (1) A disk supply stocker that stores disks to be inspected, a disk inspection unit that inspects disks for defects, a cleaning disk supply stocker that accommodates cleaning disks that clean the inspection means of this disk inspection unit, and a disk that has been inspected. the disc storage stocker for storing discs; a supply unit for transporting discs from the disc supply stocker to a disc inspection unit; and an ejection unit for transporting inspected discs from the inspection unit to the tested disc storage stocker. A disk inspection device characterized by: (2) A disk supply stocker that stores the disks to be inspected, a disk inspection unit that inspects the disks for defects, a cleaning disk supply stocker that accommodates the cleaning disks that clean the inspection means of this disk inspection unit, and the disks that have been inspected. a supply unit that transports the discs from the disc supply stocker to the disc inspection unit; an ejection unit that transports the inspected discs from the inspection unit to the inspected disc storage stocker; When it is determined that cleaning is necessary for the inspection means of the disk inspection unit, cleaning is performed using the cleaning disk, and after that, when the disk inspection unit inspects the disk, the inspection means of the disk inspection unit is cleaned again. 1. A disk inspection apparatus comprising: control means for stopping inspection by the disk inspection unit when it is determined that the inspection is necessary and this is repeated a predetermined number of times.