JPS6079560A - Disc recording device - Google Patents

Abstract

PURPOSE:To facilitate the self-diagnostic work of spindle rotation by providing a disc rotation diagnosing means and a self-diagnosis selecting switch designates the operation of this diagnosing means and controlling rotation of a spindle with the disc rotation diagnosing means when its operation is designated by a self- diagnostic switch. CONSTITUTION:In a medium detecting processing, the output of a medium detector 18 is taken in; and if a medium (a floppy disc) exists and a medium flag MD is reset, this flag MD is set, and rotation of a motor 1 which drives a spindle 2 is controlled. Next, it is checked whether a test flag is set or not. If the test flag is not set, a timer interruption time is set, and a timer is started. If absence of the medium is discriminated in the medium check, the medium flag MD is reset, and rotation of said motor 1 is stopped. With respect to timer interruption, the motor 1 is stopped when the time count time reaches a preliminarily set prescribed time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a disc recording device with a self-diagnosis function.

[Technical background of the invention and its problems] Conventionally, a disk recording device is provided with a terminal for inputting a command signal from a host computer, and a signal from a host computer is input through this terminal. Inputs rotate the spindle that holds the disk, drive the magnetic head, and read and write data to and from the disk via the magnetic head. Most conventional disk recording devices have only the so-called normal operation function, which controls the rotation of the spindle to read and write data to the disk. Fewer machines have a self-diagnosis function to control spindle rotation. In addition, even if the device has a self-diagnosis function, a diagnostic monitor must be connected to the terminal that connects to the host computer to perform self-diagnosis. Therefore, each time self-diagnosis is performed, the host computer must be disconnected and the monitor must be connected. However, there was a drawback that the diagnostic work was troublesome.

[Object of the Invention] The present invention has been made to eliminate such drawbacks, and an object of the present invention is to provide a disk recording device that can easily perform self-diagnosis of spindle rotation.

[Summary of the Invention] The present invention provides a disk recording device that uses an external command signal to rotate a spindle that holds a disk, drive a magnetic head, and read and write data to and from the disk via the magnetic head. A diagnostic means and a self-diagnosis selection switch for specifying the operation of the diagnostic means are provided, and the disk rotation diagnosis means detects the insertion of a disk when the operation is specified by the self-diagnosis selection switch, controls the rotation of the spindle, and controls the rotation of the spindle. The system detects the removal of the spindle and controls the rotation of the spindle to stop.

Further, in the present invention, the spindle rotation and rotation stop control by the disk rotation diagnosis means is performed only when the power switch is turned on.

[Embodiments of the invention] Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, a floppy disk 3 as a disk is mounted on a spindle 2 which is rotationally driven by a motor 1.
is maintained. The floppy disk 3 is provided with a long hole 5 along its radial direction for bringing the magnetic head 4 into contact with the disk medium 3a. An index hole 6 for extracting an index signal is provided approximately at the center of the disk medium 3a. The magnetic head 4 is provided at the tip of a carrier 8 that moves along two parallel shafts h7a and 7b, and is movable in the radial direction of the floppy disk 3. A presser rest 9 for holding the disk medium 3a is provided on the opposite side of the magnetic head 4 so as to be movable up and down and placed on the carrier 8.

As shown in FIG. 3, a light shielding plate 1 is provided on one side of the carrier 8.
0 is provided protrudingly, and when the magnetic head 4 is located at the zero 1-rat 9 position (for example, located at the outermost layer) of the disk media 3a, the track zero position detector 11 is detected by the light shielding plate 10. Constituent light emitting diode 11a
It is set to block light between the phototransistor 11b and the phototransistor 11b. The carrier 8 is controlled to move on the shafts 7a and 7b by a pulse motor 12 via a belt or the like.

FIG. 4 is a block diagram showing the main circuit configuration, and this circuit is composed of a microcomputer.

In this circuit, 13 is the CPU (central processing unit) 14
, ROM (read only memory) 15, RAM
(Random access memory) 16, an I10 port 17, and the like;
a write protection detector 19 for detecting the presence or absence of a write protection spark on the floppy disk 3;
, an index detector 20 for detecting the index hole 6. The track zero position detector 11 and the pulse motor drive circuit 21 are connected.

In addition, the I10 port 17 is connected to an initial reset circuit 22 consisting of a resistor, a capacitor, and a diode, one input terminal of the human-powered OR gate 23, one end of the self-diagnosis selection switch 24, one end of the alignment 1 to operation switch 25, and the track zero adjustment switch. 26 are connected to each other at one end. One end of each of the switches 24, 25, 26 is also connected to a resistor 2.
7, 28, and 29, respectively, are connected to the Vcc terminal.

The (l!! end of each switch 24, 25, 26 is grounded. The other input terminal of the OR gate 23 receives a motor-on signal M from an externally connected boss computer.
011 is entered. The output of the OR gate 23 is supplied to a motor drive circuit 30, and the motor 1 is driven by the output of the motor drive circuit 30. The pulse motor drive circuit 21 drives the pulse motor 12.

The RAM 16 stores setting areas A, B, C, and D for signals OA, OB, and 0C1OD that determine each phase of the drive signal for the pulse motor 12, a test flag TEST, a media flag MD, and a check counter (IHc and 'track zero flag To). is provided.

6 to 11 show the microprocessor 13 (7)
It is a flowchart showing the main processing that the CPU 14 performs based on the 70-gram data in the ROM 15 (7).

First, as shown in Figure 6, the power is turned on and the star 1-
When this happens, the RAM 16 is cleared and the necessary flags are set. In addition, the drive signal of the pulse motor 12 is OA
, 0D=l, OB, 0C=0. This is done by setting in the setting areas A, B, C, and D of the RAM 16. Subsequently, the self-diagnosis selection switch 24 is loaded. If the selection switch 24 is ON, the process goes to self-diagnosis processing, and if it is OFF, media detection is performed to detect the floppy disk 3, index signal check is performed to detect the index hole 6, and input of the drive signal of the pulse motor 12 is detected. Each step signal check process is performed in sequence. This process is repeated thereafter, and the selection switch 24 is no longer checked. In the self-diagnosis process, first, the test flag TEST is set to the sensor 1, and then the pulse motor 12 is set to the magnetic head 4.
Rotate the outer part of the floppy disk so that it moves outward from the surface of the floppy disk. This outer rotation of the pulse motor 12 is continued until the zero position of the track is detected. Then, when the zero position of the track is detected, media detection is performed, and when the media is detected, write 1~protect is taken in, and it is checked whether write protection 1~ has been performed on disk 3. To check. If write protection is being performed, alignment check processing is performed, and if write protection is not being performed, normal media processing is performed.

The media detection process takes in the output of the media detector 18 as shown in FIG. 7, sets the media flag MD if there is a media (floppy disk) and the media flag MD is reset to 1-, The rotation of the motor 1 for driving the spindle 2 is controlled. If the media flag MD is set at this time, the process exits without performing any further processing. Then test flag TE
Check whether ST is set. If the test flag TEST is not set, the timer interrupt time is set and the timer is started. Further, if the test flag TEST is set, the timer operation is not performed and this processing is exited.

Further, when it is determined that there is no medium in the media check, the media flag MD is reset to 1 to stop the rotation of the motor 1 for driving the spindle 2. Then, the pulse motor 12 is rotated outwardly, the zero position of the track is detected, and this process is exited. As shown in FIG. 8, when the timer count time has elapsed for a predetermined time, the timer interrupt is activated and the motor 1 is controlled to stop.

The alignment check process is performed as shown in FIG. First, this is the alignment operation switch 2.
5, and if the switch 25 is ONL, then the track zero adjustment switch 26 is read in, and ON, OFF, and F of the switch 26 are checked. The alignment check adjusts the accuracy of the track, the inclination of the spatula I, the index sensor position,
A special floppy disk called an alignment diskette is used for checking.

In other words, data for checking track accuracy, head inclination, and index hole position is written in each predetermined track on the alignment diskette. When checking the track zero adjustment switch 2G, if the switch 26 is ONL, 1-rack zero adjustment processing is performed, and if the switch 26 is OFF, the following processing is performed. First, it is checked whether the track is zero or not, and if it is zero, the content of the check counter CHC is incremented by 1, and the pulse motor 12 is turned in one direction, that is, the magnetic head 4 is moved inward with respect to the floppy disk by 3 degrees. The rotation is controlled in the direction of movement. When the disk rotates twice and reaches the second track, this alignment check process is completed. If the track is not zero, then it is checked whether the content of the check counter CI-IC is "1" or not, and if it is "1", the content of the check counter CHC is increased by 1 and the pulse motor 12 is further removed. Rotate the inner wheel 14 times in one direction up to 16 tracks. Further, if the content of the check counter C)-IC is not "1", it is next checked to see if it is "2". If the value is "2", the contents of the check counter CHC are incremented by 1 and the pulse motor 12 is further rotated 18 times in one inner direction up to 34 tracks. Also, if the check counter CHC is not 12, then it is 3.
”. If it is "3", the content of the check counter CHC is +1
This time, the pulse motor 12 is rotated 18 times in the outer direction and returned to the 16th track. If the content of the check counter CHC is not "3", the check counter CHC is reset and the pulse motor 12 is further rotated 16 times in the outer direction to return to zero mill rack.

As shown in FIG. 10, the track zero adjustment process first checks whether the track zero flag TO is set. If the track zero flag To is set, the flag TO is reset and the process exits. If it has been reset, set the flag To, set the direction signal that determines the rotation direction of the pulse motor 120 to "1j", shift the contents of the setting areas ASB, C, and D to the right from 1 to rotate the pulse motor 12 internally. .

After 4 rotations, the direction signal is set to rOJ, and the pulse motor 12 is rotated 4 times in the outer direction.

In the normal media processing, as shown in FIG. 11, the pulse motor 12 is rotated in one outer direction to perform a track zero check processing. When track zero is detected, the pulse motor 12 is rotated 40 times in one inner direction.

In the apparatus of the present invention having such a configuration, if the self-diagnosis selection switch 24 is set to ON in advance when the power is turned on, the test flag TEST is set and the self-diagnosis process is performed. In this self-diagnosis process, when the floppy disk 3 is detected by the media detector 18, the media flag ~ID is set, so as long as the media is detected, the rotation of the motor 1 is controlled and the spindle continues to rotate. In this manner, self-diagnosis can be performed by independently rotating the spindle by simply turning on the self-diagnosis selection switch 24 when the power is turned on.

In the above embodiment, the ON/OFF state of the self-diagnosis selection switch is checked only when the power is turned on to determine whether or not to perform the self-diagnosis process for the spindle rotation, but this is not necessarily limited to this. Alternatively, if data is not being written or read, it may be possible to always do so by turning on the self-diagnosis selection switch.

[Effects of the Invention] As described in detail above, according to the present invention, it is possible to provide a disk recording device that can independently diagnose spindle rotation and perform the simple operation of operating a switch.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a plan view of the main part, Fig. 2 is a side view of the main part, Fig. 3 is a diagram showing the configuration of the track zero position detector, and Fig. 4 is a diagram showing the configuration of the track zero position detector. 5 is a block diagram showing the main circuit configuration, FIG. 5 is a diagram showing the main memory configuration of RAM, FIG. 6 is a flowchart showing main processing by the microprocessor, and FIG. 7 is a media detection process in FIG. 6. Flowchart, Figure 8 is a flowchart showing timer interrupt processing, and Figure 9 is a flowchart showing alignment check processing in Figure 6.
- Flow chart: FIG. 10 is a flow chart showing the track U opening adjustment process in FIG. 9, and FIG. 11 is a flow chart showing the normal media process in FIG. DESCRIPTION OF SYMBOLS 1... Motor, 2... Spindle, 3... Floppy disk, 4... Magnetic head, 13... Microprocessor, 14... CPU <central processing unit), 1
5...ROM (read only memory), 16.
・RAM (Random Access Memory), 18...
・Media detector, 24...Self-diagnosis selection switch,
TEST...Test flag, MD...Media flag. Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 ]

Claims (2)

[Claims] (1) In a disk recording device that rotates a spindle that holds a disk, drives a magnetic head, and reads and writes data to and from the disk via the magnetic head by inputting a command signal from the outside, a disk rotation diagnostic means is used. , Self-diagnosis I! that specifies the operation of this diagnostic means! l'i selection switch, and the disk rotation diagnosis means detects the insertion of the disk and controls the rotation of the spindle when the self-diagnosis selection switch specifies the operation, and detects the ejection of the disk and controls the rotation of the spindle. A disk recording device characterized by controlling rotation to stop. (2) In a disk recording device that rotates a spindle that holds a disk, drives a magnetic head, and reads and writes data to and from the disk via the magnetic head by inputting a command signal from the outside, a disk rotation diagnostic means is used. , a self-diagnosis selection switch for specifying the operation of the diagnostic means, and a power switch are provided, and the disk rotation diagnosis means detects insertion of a disk when operation is designated by the selection switch when the power switch is turned on. A disk recording apparatus characterized in that the spindle is rotationally controlled, and the rotation of the spindle is controlled to be stopped upon detecting removal of the disk.