Disk drive compensating for track squeeze by writing non-circular servo tracks
    1.
    发明授权
    Disk drive compensating for track squeeze by writing non-circular servo tracks 有权
    磁盘驱动器通过写入非圆形伺服磁道补偿磁道挤压

    公开(公告)号:US08749904B1

    公开(公告)日:2014-06-10

    申请号:US13406778

    申请日:2012-02-28

    IPC分类号: G11B27/36

    摘要: A servo writer is disclosed operable to write servo sectors on a disk to define non-circular servo tracks. The servo writer comprises control circuitry including a servo control system operable to measure a position of a head over the disk to generate a position signal, generate a position error signal (PES) representing a difference between the position signal and a reference signal, process the PES with a servo compensator to generate a control signal, and position the head over the disk in response to the control signal. A disturbance is induced into the servo control system, and while positioning the head over the disk in response to the control signal, a plurality of servo sectors are written on the disk to define a servo track, wherein the disturbance induced into the servo control system causes the servo track to be non-circular relative to a rotation axis of the disk.

    摘要翻译: 公开了一种伺服写入器,其可操作以在盘上写入伺服扇区以限定非圆形伺服轨道。 伺服写入器包括控制电路,其包括伺服控制系统,该伺服控制系统可操作以测量磁头在磁盘上的位置以产生位置信号,生成表示位置信号与参考信号之间的差异的位置误差信号(PES),处理 PES与伺服补偿器产生控制信号,并且响应于控制信号将磁头定位在磁盘上。 扰动被引入到伺服控制系统中,并且响应于控制信号将磁头定位在磁盘上,多个伺服扇区被写在磁盘上以定义伺服磁道,其中引入到伺服控制系统 使得伺服轨道相对于盘的旋转轴线是非圆形的。

    Ramp detection by profile sweep method utilizing integrator values
    2.
    发明授权
    Ramp detection by profile sweep method utilizing integrator values 有权
    使用积分器值通过轮廓扫描法进行斜坡检测

    公开(公告)号:US08315005B1

    公开(公告)日:2012-11-20

    申请号:US12614166

    申请日:2009-11-06

    申请人: Li Zou Duc H. Banh

    发明人: Li Zou Duc H. Banh

    IPC分类号: G11B21/02

    CPC分类号: G11B21/22 G11B5/54 G11B21/12

    摘要: A system to detect a ramp position is disclosed. The system includes a head positioner coupled to an actuator arm to position a head relative to a disk and a controller to: control the head positioner to move the head toward the ramp; determine a plurality of integrator values while moving the head; generate a threshold based on the plurality of integrator values; and determine the ramp position based on a first integrator value exceeding the threshold.

    摘要翻译: 公开了一种用于检测斜坡位置的系统。 该系统包括联接到致动器臂的头部定位器,以相对于盘定位头部,以及控制器,用于:控制头部定位器以使头朝向斜面移动; 在移动头部的同时确定多个积分器值; 基于所述多个积分器值生成阈值; 并且基于超过阈值的第一积分器值来确定斜坡位置。