公开(公告)号：US20010019463A1

公开(公告)日：2001-09-06

申请号：US09751705

申请日：2000-12-29

申请人： Castlewood Systems, Inc.

发明人： David Drouin

IPC分类号： G11B021/02

CPC分类号： G11B5/55 ,  G11B21/12

摘要： A method for repositioning a read/write head from a parking location to a position adjacent a surface of a magnetic disk, the read/write head disposed on an actuator arm having a voice coil motor, includes the receiving the read/write head load signal, applying a first current pulse to the voice coil motor in response to the read/write head load signal, the first current pulse having a first amplitude and a first duration, determining a back electro-motive force in the voice coil motor, determining a read/write head velocity in response to the back electromotive force, determining the difference between the read/write head velocity and a desired read/write head velocity, using the difference between the read/write head velocity and the desired read/write head velocity to determine a second duration for a second current pulse, and applying the second current pulse to the voice coil motor.

摘要翻译： 一种用于将读/写头从停车位置重新定位到与磁盘表面相邻的位置的方法，所述读/写头设置在具有音圈电机的致动器臂上，包括：接收读/写头负载信号 响应于读/写头负载信号向音圈电机施加第一电流脉冲，第一电流脉冲具有第一幅度和第一持续时间，确定音圈电机中的反电动势，确定 读/写头速度响应于反电动势，使用读/写头速度和期望的读/写头速度之间的差来确定读/写头速度与期望的读/写头速度之间的差异 以确定第二电流脉冲的第二持续时间，以及将第二电流脉冲施加到音圈电机。

公开(公告)号：US20010012171A1

公开(公告)日：2001-08-09

申请号：US09728738

申请日：2000-11-30

申请人： Castlewood Systems, Inc.

发明人： Li-Hsin Lu ,  Stephen R. Jackson ,  David Drouin

IPC分类号： G11B005/596

CPC分类号： G11B5/59683 ,  G11B5/54 ,  G11B21/22

摘要： A method for positioning a magneto-resistive head onto an head load/unload ramp of a storage unit, the magneto-resistive head disposed upon an actuator arm, the actuator arm also having a voice coil, includes the steps of detecting a reset signal, generating a back electro-motive force voltage with a spindle motor in response to the reset signal, generating a drive voltage in response to the back electro-motive force voltage, using a switching circuit to provide the drive voltage to the voice coil in a first polarity for a first period of time, and thereafter, using the switching circuit to provide the drive voltage to the voice coil in a second polarity.

摘要翻译： 一种用于将磁阻头定位到存储单元的磁头加载/卸载斜坡上的方法，所述磁阻头设置在致动器臂上，致动臂还具有音圈，包括检测复位信号的步骤， 利用主轴电动机响应于复位信号产生反向电动力电压，利用开关电路产生响应于后向电动势电压的驱动电压，以将驱动电压提供给第一 极性，然后使用开关电路以第二极性向音圈提供驱动电压。