JPS6214375A - Disk drive device - Google Patents

Abstract

PURPOSE:To make possible various types of adjustments or a characteristic test or the like even when there is no external controller by providing a head seek test means and a test switch, and operating the head seek test means by the test switch to perform the head seek operation. CONSTITUTION:An external control signal is fed from a bus line 22 to a CPU 24 through an interface 23 and a write/read signal is delivered between an external part and a read/write circuit 25 through the bus line 22 and the interface 23. In the CPU 24, there is provided a head seek test means 28 taking signals from a test switch 26 and a seek switch 27 as inputs. This head seek test means 28 carries out a control operation according to a flow, starts the test by turning on the test switch 26 and completes the test by turning off the switch 26. In this manner, the control of the operation is completely performed by a program of the CPU 24 incorporated in a disk drive device 21 and even when there is no external controller, various adjustments or a characteristic test or the like can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a disk drive device such as a floppy disk device.

(Conventional technology) FIG. 3 shows an example of a conventional disk drive.

In FIG. 3, a drive bin 2 is protruded from a spindle hub 11- which is rotationally driven by a disk drive motor, and a part of the hub 4 of a disk 3 placed on the spindle hub 1- By engaging with the drive bin 2, the disk 3 is rotated by the L disk drive motor based on a motor-on signal from the control circuit 11. A magnet 5 is fixed to the circumferential surface of the spindle hub 1, and an index signal is obtained by detecting the magnet 5 with a Hall element 6 serving as an index detector. A magnetic head 7 is in sliding contact with the disk 3 to record and reproduce data signals on the trunk of the disk 3. The magnetic head 7 is supported by a carrier (not shown), and is moved in steps in the radial direction of the disk 3 by a stepping motor 8. The disk 3 is housed in a predetermined case, and when the disk 3 and the case are loaded into the disk device, the disk hub 4 rides on the spindle hub 1, and the disk hub 4 is placed on top of the spindle hub 1, and the disk hub 4 is placed on the spindle hub 1.
is now detected. The cassette detector 9 is an optical detector, and is controlled by the control circuit 11 in 1. The ED is driven to emit light, the light from the Ell is received by the light receiving section, and this light reception signal is input to the control circuit 11 as a cassette detection signal. A detection signal from the ball element 6 is input to a control circuit 11. A step signal and a blank signal are inputted to the control circuit 11 from the outside, and the step motor 8 is driven stepwise in the forward rotation direction or the reverse rotation direction. Control circuit 11
outputs ready iM''-1 to the outside in certain cases.

The control circuit 11 controls the operations of the circuit 12 and the write circuit 13, writes write data to the disk 3 through the magnetic head 7, or converts data recorded on the disk 3 to the magnetic head 7 if! l L7 is read and read data is obtained.

The rotation of the disk drive motor as described above, the head seek operation by the stepping motor 8, and the magnetic head 7
Operations such as reading/writing data are controlled by a control circuit 11 in response to control signals from an external controller such as a host computer.
Further, the trunk 00 signal, index signal, external ready signal, etc. necessary for this control operation are inputted to the external controller through the control circuit 11.

(Problems to be Solved by the Invention) According to the conventional disk drive device, the operation is controlled by receiving a control signal from an external controller, so the disk drive device is only temporarily idle. It is not possible to control the operation. Therefore, when trying to adjust the track position of the head, etc., it is necessary to prepare an external controller or something to replace it, and if there is no row controller or something to replace it, various adjustments and characteristic tests are required. etc. could not be done.

The present invention has been made to solve the above-mentioned conventional problems, and allows the magnetic head to move stepwise to a specific track without an external controller, thereby making it possible to perform various adjustments and characteristic tests. It is an object of the present invention to provide a disk drive device as described above.

(Means for Solving the Problems) The present invention provides a disk drive in which a control circuit in the device receives a control signal from an external controller to control the operation of a spindle motor and a step motor in the device. The disk drive device is provided with a head seek test means and a test switch, and the test switch operates the head seek test means, so that the head seek operation can be performed without an external controller. It is characterized by

(Operation) When the alignment disk is centered and the head seek test means is operated by the test switch, a head seek operation is performed. Since data for head adjustment is written in a predetermined trunk of the disk, it is possible to read the data written on the disk at the seek position and adjust the head position to the specified position based on this read signal. can.

(Embodiment) FIG. 1 shows an embodiment of the present invention, with reference numeral 21
3 shows a disk drive device, but the disk rotation drive mechanism, head seek operation, and other mechanical components can be the same as those in the conventional example shown in FIG.
Mechanical components are not shown.

In FIG. 1, the control signal from the column section is transmitted to the pass line 22.
The read/write signal is sent to the CPU 24 via the interface 23, and the read/write signal is sent to the external read/write circuit 25 via the pass line 22 and the interface 23.
given and received between. There is a test switch 26 inside the CPU 24.
A head seek test means 28 is provided which receives the signal from the seek switch 27 as an input. This head seek test means 28 performs control operations according to the flow shown in FIG.
The test starts by turning on the switch 26, and ends by turning off the switch 26. A pulse-like signal is output from the seek switch 27 and inputted to the heno 1 seek test means 2H. This test 1 means 2
8, the step motor is driven 1! based on the signals from the test switch 26 and the seek switch 27. IIl/629
Controls the operation of the step motor 30 through °ζ, to the magnetic field.

Control the step movement of the door 31. The means 28 are also adapted to control the operation of the spindle motor 32.

The CPtJ 24 controls the read/write circuit 25 according to various signals inputted through the interface 23, writes data signals to the disk with the magnetic head 31, and also reads the written data signals. is read out. A track oo signal is also input to the CPLI 24 from the track 00sen-IJ'33.

Next, the operation during the head seek test in the above embodiment will be explained step by step with reference to FIG.

(+) When the test switch 26 is turned on, the flow starts.

(2) Turn on the spindle motor drive circuit and drive the spindle motor 32 to rotate the disk.

(3) Since the tracks of the disk in which the data for performing the alignment of &f 31 are written are predetermined, first, one of the predetermined tracks, A.
Set up the track.

(4) Seek (move) the magnetic head 31 to the set track
Before this, a signal is input to the step motor drive circuit 29 to operate the step motor 30 and return the magnetic head to track 00. The position of this trunk 00 is detected by a trunk 00 sensor 33.

(5) Seek the throat 31 magnetically to the set track.

Since the track is initially set to the A track, the number of pulses necessary for the magnetic head 31 to move to the A track is applied to the step motor drive circuit 29, and the magnetic head 31 is moved to the A track position. . By looking at the output of the magnetic head 31 in this state, the position and inclination of the magnetic head 31 with respect to the trunk can be determined, and thereby the position of the magnetic head 31 can be adjusted.

(6) When a seek operation to the setting track is performed, the setting track is updated. For example, update from A trunk to B trunk.

(7) Next, check the state of the seek switch 27, and if the seek switch 27 is on, perform steps (4) to (6) above.
) is repeated, and a seek operation is performed to the updated trunk, for example, the B track. Therefore, after completing the inspection on the setting track, by turning on the seek switch, you can move the head to the next setting trunk.
It can be repeated as many times as the preset number of trunks.

(8) The above seek operation is performed while the test switch 26 is on, and when the switch 26 is turned off, the spindle motor 32 is turned off at (9), and the head seek test is ended at (10). That is, after the tests on all configured trunks are completed, the test is completed by turning off the test switch.

As explained below, all operations are controlled by the CPLJ24 program built into the disk drive 21.If you set the seek test mode and then specify a track, the spindle 1 & magnetic head with the motor turned on can be moved to a designated track.

In the case of a floppy disk, although the trunk to be used for adjustment is fixed, it is effective to set that trunk as a specific trunk and have the seek operation performed for the set I rank.

In the above embodiment, pressing the seek switch moves to the next track, but it may also be configured to automatically move to the next trunk after a certain period of time has elapsed. , a switch may be provided to temporarily stop movement of the trunk.

(Effects of the Invention) According to the present invention, the disk drive device is provided with a head seek test means and a test switch, and the test switch operates the head seek test means, thereby making it possible to perform a head seek operation without an external controller. With this configuration, it is now possible to perform various adjustments and characteristic tests without the need for an external controller.

[Brief explanation of the drawing]

FIG. 11 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a flowchart for explaining the operation of one embodiment.
FIG. 3 is a perspective view showing an example of a conventional disk drive device together with an example of a control system. 24-CI as a control circuit) [J, 26-Chistosuisochi, 28-Head seek test means, 30-Step motor, 32-Spindle motor.

Claims (1)

[Claims] A disk drive device in which a control circuit in the device receives control signals from an external controller to control the operations of a spindle motor and a step motor in the device, and the disk drive device is equipped with a head seek test. What is claimed is: 1. A disk drive device comprising: means and a test switch; the test switch operates the head seek test means; and the head seek operation can be performed without an external controller.