TH21005A - Servo journaling system for use in data log drive devices - Google Patents

Abstract

Non-invasive servo journaling system for use in disc drive devices The data log measures the position of the movable part and generates a reference clock signal. Using a semiconductor laser Reflection type scattering grating attached to the arm of the The movable and controlled part of the spinning shaft acts as a reference position within the optical device for rebuilding the wave front, correcting grating aberration. Optical detectors It detects differences in pattern changes due to scattering caused by the sieve. This makes it possible to organize the sensitivity to the flow of frequency. Electronic decoding device It converts the data from the optical detector into the result of measuring the position of the movable part. The electronic control device drives the voice coil motor inside the disc drive device, bringing the recording power changer into position where the servo message is saved. Which is obtained from the servo scheme generator The transparent opening in the head / plate unit cover will cause A servo recording system can be recorded in the drive device that has been assembled and closed to the crystal. Complete

Claims (9)

1.System for measuring the arm position of the movable part in the plate drive device. Record information including Positionable movable arm (114) Recording disc drive device (102) Lysor light source (200) which emits light beam against the movable arm (114) Scattering grid. Reflected light (120a) attached to the arm of the movable part (114) to scatter the incident light. A photodetector (202,204), which measures the difference in the wavelength in a pattern from Scattering reflected back from the sieve (120a); And an electronic device for decoding the positional signal of the movable part (126), which is connected to the photodetector (202,204), which receives and converts the difference in the measured wave range. It is a signal that represents the position of the arm of the movable part (114), characterized by the electronic device for decoding the position signal of the part. Movable (126) also converts the difference in the received wave range into a directional signal. Of the movement of the arm of the movable part (114). 2.The system, as stated in claim 1, where the optical detector (202,204) measures the difference in the wavelength between the +1-order scattered laser beam and the -1-order scattered laser beam. 3. System as set out in claim 1, where laser light source (200) is semiconductor laser beam. 4.Systems as stated in claim 1, where the light scattering grid (120a) includes a linear grid pattern. 5.The system, as set out in claim 2, where the photodetector (202,204) includes an optical device for reconstructing the wavefront that compensates for the distortion of the optical wave front in the beam. Scattered laser 6. The system as described in Clause 5, where the decryption electronic device. The positional signal of the movable part is a microprocessor. 7.System for generating a reference clock signal in a disk drive device with a layer of A plate on a rotating shaft that can be rotated, consisting of Rotating shaft (106) Disk drive device (102) Laser source (700), which emits light beams against the rotating shaft (106) Reflex scattering grating (130) attached to the rotating shaft (106) ) Where to scatter the beam Incident light A photodetector (702,704), which measures the difference in the wavelength in a pattern from Scattering reflected back by a sieve (130), which is characterized by Electronic clock sensing device (136), which is connected to a photodetector (702,704), which receives and converts the difference in the measured wave range into a reference clock signal. 8. System for writing servo news that consists of A system for measuring the arm position of the movable part in a drive device from the log. Information according to claim 1 to 6, any one Which also consists of Electronic servo control device (128) which is connected to the electronic device. For decoding the positional signal of the movable part (126) and the arm of the movable The movable arm (119) can be manipulated with the controllable movable arm position (114) and the servo scheme (142) connected to the recording head (112), which provides information. A servo for the recording head (112) to write on the disk (104) and where the electronic device for decoding the positional signal of the movable part (126) also converts the difference in the wavelength. It is obtained as a signal that represents the direction of the arm's movement. Movable part (114) 9.The system as set out in Clause 8, which also includes The second semiconductor laser source (700) outside the plate drive device (102), which emits a beam of light hitting the rotating shaft (106), the second reflector scattering grid (130), which is attached. With a rotating shaft layer (106), which scatters the incident beam from the second semiconductor laser source (700), the second optical sensing device (702,704), which measures the difference in the wavelength in a Scheme from the scattering reflected from the second grid (130), an electronic clock sensing device (136) connected to the sensor circuit. Light Capture a second device (702,704) that will receive and convert the difference in the measured wave range into a signal. Reference clock; And electronic equipment for controlling the recording of servo messages (140) connected to the circuit Servo control electronic equipment (128), servo schematic generator (142) and electronic clock sensing device (136) that coordinate the recording of servo messages.