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Control method of automatic disc balancing system in CD machine

A technology of automatic balancing and control methods, applied in the fields of rotational vibration suppression, instruments, structural parts of record carriers, etc.

Inactive Publication Date: 2006-06-21
LITE ON IT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it can be seen from the above that the above-mentioned traditional CD-ROM disc automatic balancing system obviously has some defects in actual use, and needs to be improved.

Method used

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  • Control method of automatic disc balancing system in CD machine
  • Control method of automatic disc balancing system in CD machine
  • Control method of automatic disc balancing system in CD machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment one: present embodiment is the mode of using electricity, and this control method comprises the following steps (please also refer to figure 1 , figure 2 and image 3 ):

[0026] (a) Before the rotational speed of the spindle motor 10 is higher than the critical speed, add a high-frequency and low-amplitude disturbance signal (dither signal) to the command signal for the acceleration of the motor 10, and then the mass balance member (steel ball 13) can use this disturbance signal It is in the beating state of high-frequency and small amplitude, thereby reducing friction, and smoothly moving to the position where the disc unbalance vector is reversed during acceleration;

[0027] (b) After the rotation speed of the spindle motor 10 is higher than the critical speed, remove the disturbance signal, and continue to accelerate the spindle motor 10 to the highest rotation speed.

Embodiment 2

[0028] Embodiment two: the present embodiment is to use the mechanical mode, and this control method comprises the following steps (please also refer to Figure 4 and Figure 5 ):

[0029] (a) Add a micro-vibration motor 14 at an appropriate position of the optical-mechanical module, and apply a high-frequency and low-amplitude command signal to this micro-vibration motor 14 before the spindle motor 10 rotates at a speed higher than the critical speed to generate a micro-vibration motor 14. With the additional excitation force, the mass balance component (steel ball 13) can be in a high-frequency and small-amplitude beating state with this excitation force, thereby reducing friction and smoothly responding to the disc unbalance vector during acceleration. The position of the phase moves;

[0030] (b) After the rotation speed of the spindle motor 10 is higher than the critical speed, turn off the operation of the micro-vibration motor 14 and continue to accelerate the spindle...

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Abstract

A control method for an automatic disc balance system of an optical disc drive, which uses an external force to make the mass balance component in a disturbed state before the rotation speed is higher than the discharge critical speed during the acceleration of the spindle motor. In this way, the frictional resistance can be reduced and the mass balance member can smoothly move to the position where the disc imbalance vector is reversed. After the rotation speed of the spindle motor is higher than the critical speed, the disturbing force is removed and the motor continues to be accelerated. to maximum speed.

Description

technical field [0001] The invention relates to a control method for an automatic disc balance system of an optical disc drive, especially a control method that can minimize the influence of frictional resistance on the movement of mass balance components, thereby ensuring the best balance effect. Background technique [0002] With the advancement of optical data information access media technology, the reading speed of optical disk drives used in computer peripherals also shows rapid development. Today, CD-ROMs with a spindle motor whose rotation speed exceeds 10,000 RPM have gradually become mainstream products in the market. [0003] When the spindle motor runs at a high speed, the centrifugal deflection force generated by the unbalanced disc also increases, resulting in problems such as vibration and noise. In the actual application of optical disc drives, excessive vibration will cause the instability of the optical head's reading ability, making it impossible for the ...

Claims

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Application Information

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IPC IPC(8): G11B33/00F16F15/14
Inventor 廖正尧黄清河陈子南郭立华
Owner LITE ON IT