JPS58114359A - Cylinder maintaining and controlling system - Google Patents

Abstract

PURPOSE:To ensure high accuracy for a kick-back action which is caused when a data is written spirally, by controlling to decelerate the kick-back speed only in a kick-back action mode. CONSTITUTION:An optical disk D is led to a sector l of a cylinder track SL, and then a kick-back enable signal and a low-speed kick-back indicating signal are transmitted from an optical disk controller. Thus a track driving circuit 1 keeps a recording/reproducing head as it is. When this head reaches a terminal point E of the track SL, an index pulse serving as a detecting signal of an index mark M is applied to an AND circuit 5. In this case, an AND circuit 8 applies a low-speed kick-back indicating signal to the circuit 1. Therefore a kick-back control of a lower speed than a normal kick-back action is carried out. Thus the recording/reproducing head is positioned on a point S' of the track.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a cylinder maintenance control method. Shiku N-
This relates to a cylinder maintenance control method that controls the cylinder so that it is located all over the cylinder.

For example, when writing data on an optical disc, there is a method of writing data in a spiral shape and a method of writing data in concentric circles on the optical disc.

As shown in FIG. 1, on the optical disk D on which data has been written in the spiral shape 11, when reading is currently performed on the cylinder track 8LK, the head remains on the scissors cylinder track sL even after the reading is completed. controlled as follows. That is, when this cylinder track 8L is formed from the start point 8 to the end point z'c111, a reading is performed for a portion of the rear cylinder in the middle.

Even after the head has removed this sector part I, it continues to exist on this cylinder track 8L. And the end point I! When 9 is reached, the head moves to sector 8 at the starting point.
It is backed up and positioned on the cylinder track 8L again. In this way, until the next access, the head is accessed after iIk and held KM so that it is on the 9th cylinder track. When writing data on this head, for example, an optical drive is controlled such that the head is positioned on the last cylinder track.

By the way, when controlling the kick puck of this head,
This kick puck has high speed and transition distance #
1! Due to the fact that L is very short, this kick e-pack control may not be performed completely and it may be located on a different cylinder track.9.

In this way, when the head is not located on the cylinder track where the head is located, the head is moved by the number of 9 cylinder tracks as instructed by the first axis control and the head. However, since the cylinder is no longer located on the desired cylinder track, there is a drawback that it is not possible to collect the desired data. When entering data, a problem arises in that the data is written over two cylinders that have already been written.

(3) Purpose of the Invention Accordingly, the purpose of the present invention is to enable the kick-puck motion that occurs when data is written in a spiked manner to be performed accurately.

To provide a nine-cylinder maintenance control system by which the speed of the middle pick-puck can be controlled to be slowed down only when the kick-puck is in operation.

(41 Structure of the Invention and Rounding to Accomplish Such Purposes) In the 7-cylinder one-hold control system of the present invention, data is written on the disk in the form of spikes, and after an access is completed, data is written in the form of spikes until the next access. In a disk device where the recording/reproducing head is maintained on a cylinder track, the recording/reproducing head is
It is equipped with a track drive means for controlling the jump speed of the playback head and a kick Φ pack speed selection input means, and when a KdP pick-back is performed when a low-speed medium-pick e-pack speed instruction is present, recording and playback are performed automatically. The head is controlled to be kicked back by the track drive means at a lower speed than the normal speed, and the playback head II! The present invention is characterized in that the kick-puck operation is terminated upon detecting that the completion signal appears after the start of the kick-puck operation.

Embodiment of the Invention An embodiment of the present invention will be described based on FIGS. 2WA to 4.

Fig. 2 is a configuration diagram of an embodiment of the present invention, and Fig. 3 is a track diagram.
Cross signal explanatory diagram, FIG. 4 is an explanatory diagram of ON-operated Trutter 4#.

In the figure, 1 is a track drive circuit, 2t1 amplification a, S
is a lead amplifier, 4 is an amplifier/sensor, 5 is an AND circuit, 6 is a flip-flop, 7 is a Hironobu circuit, 8.9 is an AND circuit for each of Hiro, 10.11 is an OR circuit for each of Hiro, ゛12 is an inverter, 1s .

14 and 15 are AND circuits, and 16 is an OP amplifier.

The track drive circuit 1 controls the position of the recording/reproducing head on the cylinder track.

During read/write, when the recording/playback head is driven by jumping KII number of cylinder tracks, the low continuous kick Φ pack drive control es- jump drive control #2 kicks back at the slow speed peculiar to Yamei. -f- Perform a normal speed kickback drive control to be able to perform a normal kickback as before if you wish to perform a kick-pat/wo at a conventional speed. It is something that can be done.

Amplify J! ! While amplifying the 2-hiro track devo signal, the on-track signal among them is output to the AND circuit 13, and the track fist cross signal is output to the AND circuit 15. ζ Here, the on-track signal is a signal indicating that the recording/reproducing head is positioned on the pit row, and indicates that the output of the OF amplifier 16 is OK.

As shown in the figure, the next 110 bit string PsK is formed on the optical disk from the 9 bit string P1. Since it is located above, the fourth
As shown in the figure (b), the playback head has a ζ hit string Pt.
A signal having an exchange for detecting the existence of the social bit is output during the Kyoto period T1, and the bit string P1. A DC component signal is output during the period t crossing between P and T, and a signal having an exchange is output again at T between the round portions located on the bit archipelago of *a. Then, to detect the AC component signal in the next period TmK of the DC component signal in these two periods t,
It is possible to detect when the recording/playback head is turned on to the next track, and this AC signal is sent to the playback head a.
It's a p-signal. Also, the track .sigma.stack is a signal indicating that the recording/reproducing head has crossed the pit row, as shown in the mS diagram.

When the recording/reproducing head is positioned on the bit string P-, its servo head H-1 is positioned at the outer boundary of the bit, and the other servo head H-2 is positioned at the inner boundary of the bit. Then, when the recording/reproducing head moves in the direction of the arrow and crosses the pit archipelago from the bit string P1, the servo head installed at this and -Jll)
I-1 and H-2 will also be attending at the same time.

In this case, the servo head H-2 is entirely located within the bit, and the servo head H-1 moves away from the bit, so the signal to the servo head H-1 is small and pH
*V to -2 becomes large. This is compared by the OF amplifier 16, and the OF amplifier 16 first outputs a pulse-like signal in the negative direction. When the recording/reproducing head moves onto an adjacent bit string, the input to the servo head H-2C first decreases, so the OP amplifier 16 outputs a positive pulse signal crt.

The ζO positive O pulse signal Cr crosses the adjacent bit string and becomes a track-cross signal indicating 9.

The read amplifier 3 amplifies the face removal signal output from the playback head, and the amplifier t4 outputs a signal continuation signal that continues while the face removal signal is transmitted from the read amplifier 5 for a certain period of time. do.

When the delay circuit 7 is set, the output is delayed for a certain period of time, and the AND circuit 14,
15, when either one of the AND circuits 14 and 15 is turned on, the aforementioned tritub/70 tubular circuit is reset via the OR circuit 10.

Next, the operation of FIG. 2 will be explained with reference to other figures.

[1] In the case of low-speed kick pack control ■Now, the first
In wJ, part I of the cylinder track SL of the optical disc D! When the read is completed, a middle puck back enable signal and a low speed kick puck instruction signal are sent from the optical disc control device (not shown).

At this time, the OR circuit 11 outputs "0" and the inverter 12 outputs "1". Kj! Since it is located on a continuous bit string, it outputs an O/Tokutsuku signal, so the AND circuit 1iSti) outputs a rank continuation signal, and the track drive circuit 1 leaves this recording/playback head in the same state. Make it continue.

■And the recording/playback head is this cylinder track 8
When reaching the end point E of L, the index φ on the optical disk D
A mark M is detected by a nine index mark detection section (not shown), and an index pulse indicating detection of this index pot mark is applied to an AND circuit S. At this time, since the kick pack enable signal has already been applied to the AND circuit 5, the AND circuit 5 outputs "1".

Set the flip @70 knob 6 and output this heavy "1". As a result, "1" is applied to the AND circuit 8.9. At this time, the playback head Hiro Il! Since it is outputting the take-up signal, the amplifier center 4 is outputting a signal continuation signal, and the low-speed kick-pack instruction signal is also applied, so the AND circuit 8 outputs this low-speed kick e-pack instruction. A signal is applied to the track drive circuit 1. From this K, the track drive circuit 1 is lk! 9 For example, the normal kick-back motion of the brass playback head is a fraction of a fraction or a number of 1.
Kick-pack I4 control is performed at a low speed of 1/0. At this time, since the disc continues to rotate, the main head of recording f is located at point 8' within the margin area from the starting point S. By the way, the lip flop 6 marked #7 is set and its output is also applied to the delay circuit 7. At this time, a low-speed kick/puck instruction signal is applied to the AND circuit 14, and a signal continuation signal is applied from the nine-up/down sensor 4, so the flip/puck instruction signal is applied.
After the 7a knob 6 is set and the low-speed kick-puck operation is completed, the delay circuit 7 generates an output "1" and then reaches the - timing in FIG.

When the signal continuation signal is applied from the amplifier t4, the AND circuit 14 outputs "1", which is applied to the reset terminal of the flip-accompanied flop 6 via the OR circuit 10, thereby resetting it.

■Once the low-speed kick Φ pack control is completed in this way, it will be amplified! 112 outputs an on-track signal, and the AND circuit 1s outputs a track-hold signal, which is applied to the track drive circuit 1.

The recording/playback head repeats this cylinder track 8L, and the recording/playback head uses this cylinder track 8L.
Being above means K. In this way, the cylinder
Holding control is performed.

1] In the case of jump control When cylinder-holding control is being performed as described above, if another cylinder track is to be accessed, the optical disk control device will issue a jump instruction control signal according to the destination of the access. The signal is transmitted to the track drive am1. “Thereby, the track drive enclosure 1 jump-controls the recording/reproducing head.The pit row at the jump destination is
AM weaving can be performed by counting the track-cross signals output from 6.

(5) When carrying out the normal speed kick e-pack control based on the normal speed kick pack control based on the normal speed fK middle pick pack control, the normal kick pack instruction signal is sent from the optical disk control station. It is output to the AND circuit 9.

And same as (1) above.

A kick pack-enable signal is output from the optical disk control device, and the index fist (Rus) is output from the AND circuit 5.
When the signal is transmitted to 9, the AND circuit 51i outputs "1" and sets the 7 lip-flop 6. From this K, the AND circuit 9 applies the normal kick e-pack instruction signal to the track drive circuit 1.

Thus, the recording/playback head is controlled by the kick-e pack at the normal kick speed.
6 is the tracking signal C
When r is output, it is applied to the AND circuit 15 via the amplifier 2. When the delay circuit 7 outputs "1", the AND circuit 15 outputs "month", which is applied to the reset terminal of the flip-flop 6 via the OR circuit 10.

In this way, frig #70 knob 6 will be reset. This kind of repetition is repeated to keep the recording/reproducing head humming/driving.

(6) Effects of the Invention As described above, according to the present invention, it is difficult to perform the kick φ at a speed that is slower than the normal kick φ back speed, so the details of the stored information are modified.

- Even if the kick-puck operation is hardly allowed, accurate kick-puck can be performed based on the low-speed kick-puck control l11K. However, for 40, which can be controlled at the normal kick puck speed, it can be controlled at the normal kick back speed, so it is up to you to perform appropriate control according to your needs. .

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of an optical disc, Fig. 2 is a configuration diagram of an embodiment of the present invention, Fig. 5 is an explanatory diagram of a track cross signal, and Fig. 4 is an explanatory diagram of an optical disc.
- The figure is an explanatory diagram of the on-track signal. In the figure, 1 is a track drive circuit, 2 is an amplifier, ! I is lead amplifier, 4 is amplifier system sensor, 5 is AND circuit, 6
is a flip flop, and 7 is a late fight #l. 8.9 is an AND circuit, 10.11 is an OR circuit, 12 is an inverter, 13, 14.15 is an AND circuit, and 16 is an OP amplifier.

Claims (1)

[Claims] (1) In a disk device in which data is written in a linear shape on the disk, and the wiring and playback head are maintained so as to be located on the same cylinder track after the end of access until the next access.Time control method .