Abstract:
A method for centering the disk of a disk stack assembly. The method includes the step of applying a torque to the disk stack and spinning the disks. Both the torque and the spinning speed are less than normal operating values. A series of radial forces may then be applied to the disk stack. The series of forces will cause the rotating disks to self center. The rotating disks are eventually spun down and a full torque is applied to the disk stack to secure the disks.
Abstract:
PURPOSE: A method and an apparatus for assembling a disk stack assembly of a hard disk drive, and a method for writing servo information to a disk of the hard disk drive applying the same, and a writer are provided to efficiently prevent eccentricity of a disk generated in assembling the disk. CONSTITUTION: A servo writer(40) writes servo information on disks(12) of a disk stack assembly(42). The disks are accumulated on a chuck(44) combined with a spindle motor(46). The spindle motor rotates the disks. The servo writer includes a plurality of heads(48) magnetically combined with the disks. The plurality of heads are driven by a servo writing circuit(50). The servo writing circuit controls the rotating heads to write the servo information on the disks. The servo writer includes a force actuator(52) applying force to the chuck. The force actuator is connected to a force generator(54).
Abstract:
PURPOSE: A servo track recording method and system of a hard disk drive are provided to offer an inexpensive and stable servo track recording system. CONSTITUTION: A reference disk having a plurality of tracks including servo information and a servo-copy disk(120) are combined with a spindle motor of a servo track recording system. The servo information of the reference disk is read with a reading head(110) of the servo track recording system. The servo information is recorded in the copy disk using a recording head of the servo track recording system before the servo-copy disk is integrated into a hard disk assembly. The reference disk and the servo-copy disk are rotated using a hydromechanical bearing spindle. The servo information is recorded in the copy disk in such a manner that a plurality of burst signals for judging the position of a drive head are recorded in the disk.
Abstract:
본 발명은 헤드 짐발 조립체의 롤 중심을 슬라이더의 두께보다 낮추기 위한 만입된 표면이 마련된 슬라이더를 포함한다. 이러한 슬라이더와 함께 구성된 헤드 짐발 조립체는 디스크 진동에 의해 유도된 트랙-이탈 변위를 감소시킬 수 있다. 로드 빔에 마련된 짐발은 만입된 표면에 접촉될 수 있으며, 슬라이더 두께보다 낮은 슬라이더 롤 중심을 형성한다. 한편, 슬라이더는 로드 빔에 형성된 짐발에 접촉하는 슬라이더 접촉 커버를 포함할 수 있다. 슬라이더 접촉 커버는 만입된 표면을 통해 슬라이더에 결합될 수 있다. 본 발명은 이러한 헤드 짐발 조립체를 가진 액츄에이터 조립체를 포함한다.
Abstract:
하드 디스크 드라이브 조립체에 사용되는 디스크 상에 서보 정보의 기록을 위한 방법 및 장치에 관해 개시된다. 한 실시예에서, 서보 정보는, 읽기/쓰기 동작 동안 디스크를 회전시키는 유체 역학적 베어링 스핀들을 적용하는 오프라인 서보 트랙 기록장치를 이용하여 디스크에 선-기록된다. 다른 실시예에서, 오프라인 서보 트랙 기록장치를 이용하여 레퍼런스 디스크의 트랙 추종의 방법에 의해 디스크 상에 서보 정보가 기록된다.
Abstract:
PURPOSE: A slider for reducing an off-track motion of a head caused by a disk vibration, an HGA(Head Gimbal Assembly) and an actuator assembly comprising the slider and the HGA are provided to lower an available roll central position of a slider than slider thickness, thereby decreasing an off-track motion caused by a disk vibration. CONSTITUTION: A slider(100) has an indented surface(104) to lower a roll center of an HGA than thickness of the slider(100). The HGA configured with the slider(100) can reduce off-track displacement caused by a disk vibration. A gimbal(300) disposed on a load beam(80) is contacted with the indented surface(104), and forms a slider roll center lower than the slider thickness. The slider(100) includes a slider contact cover(102) contacted with the gimbal(300). The slider contact cover(102) is coupled with the slider(100) through the indented surface(104). An actuator assembly comprises the HGA.