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    • 2. 发明授权
    • Disk drive detecting crack in microactuator
    • 微型驱动器中的磁盘驱动器检测裂纹
    • US08335049B1
    • 2012-12-18
    • US12794891
    • 2010-06-07
    • Yanning LiuChuanwen JiNathan J. Santee
    • Yanning LiuChuanwen JiNathan J. Santee
    • G11B5/596
    • G11B19/048G11B5/5552
    • A disk drive is disclosed comprising a first disk surface, a first head coupled to a distal end of an actuator arm, and a voice coil motor (VCM) and a first microactuator operable to actuate the first head over the first disk surface. A servo loop for servoing the head in response to the servo sectors is disabled, and after disabling the servo loop, the first microactuator is excited with a control signal at a test frequency in order to accentuate a crack in the first microactuator. After exciting the first microactuator, the servo loop is enabled, and after enabling the servo loop, the first microactuator is evaluated to detect the crack in the first microactuator.
    • 公开了一种磁盘驱动器,包括第一磁盘表面,耦合到致动器臂的远端的第一磁头和音圈电动机(VCM)以及可操作以在第一磁盘表面上致动第一磁头的第一微型致动器。 用于响应于伺服扇区伺服磁头的伺服回路被禁用,并且在禁用伺服回路之后,第一微致动器以测试频率的控制信号被激励,以便加强第一微致动器中的裂纹。 在激活第一个微致动器之后,伺服回路被使能,并且在启用伺服回路之后,评估第一微致动器以检测第一微致动器中的裂纹。