公开(公告)号：US06198590B1

公开(公告)日：2001-03-06

申请号：US09120854

申请日：1998-07-21

申请人： Raffi Codilian ,  Terry C. Dawson ,  Carl R. Messenger ,  Steven Nemshick ,  Robert P. Ryan

发明人： Raffi Codilian ,  Terry C. Dawson ,  Carl R. Messenger ,  Steven Nemshick ,  Robert P. Ryan

IPC分类号： G11B1546

CPC分类号： G11B19/20

摘要： A disk drive employs a method of operating a spindle motor to respond to a spin-down command to reduce the time required for subsequently responding to a spin-up command. After receiving the spin-down command, and while the rotor continues to spin in the forward-spin direction, a state machine is set to and maintained in a first predetermined register state such that a controlled rotor-stopping operation is performed. At the end of the controlled rotor-stopping operation, the rotor angle is within the range of a peaked forward direction waveform for a second predetermined register state of the state machine.

摘要翻译： 磁盘驱动器采用操作主轴电机以响应减速命令的方法，以减少随后响应旋转命令所需的时间。 在接收到旋转命令之后，并且当转子继续向前旋转方向旋转时，状态机被设置并保持在第一预定的寄存器状态，从而执行受控的转子停止操作。 在受控转子停止运转结束时，转子角度在状态机的第二预定寄存器状态的峰值正向波形的范围内。

公开(公告)号：US07095579B1

公开(公告)日：2006-08-22

申请号：US11143839

申请日：2005-06-02

申请人： Robert P. Ryan ,  Ashok K. Desai ,  Hemant Melkote ,  Jenghung Chen ,  John R. Agness ,  Terry C. Dawson

发明人： Robert P. Ryan ,  Ashok K. Desai ,  Hemant Melkote ,  Jenghung Chen ,  John R. Agness ,  Terry C. Dawson

IPC分类号： G11B21/02

CPC分类号： G11B21/12

摘要： A disk drive is discloses comprising a disk, a head connected to a distal end of an actuator arm, and a voice coil motor (VCM) for rotating the actuator arm about a pivot in order to actuate the head radially over the disk. If when a power failure occurs the radial location of the head is less than a predetermined distance from the outer diameter of the disk, the VCM is controlled to move the head toward the inner diameter of the disk and stopping the head before it reaches the inner diameter of the disk. The VCM is then controlled to move the head toward the outer diameter of the disk until the actuator arm unloads onto a ramp.

摘要翻译： 公开了一种磁盘驱动器，其包括盘，连接到致动器臂的远端的头部和用于围绕枢轴旋转致动器臂的音圈电动机（VCM），以便在盘上径向驱动头部。 如果当电源故障发生时，磁头的径向位置小于距离磁盘外径的预定距离，则控制VCM使磁头向盘的内径移动并在磁头到达内部之前停止磁头 磁盘的直径。 然后控制VCM以使头朝向盘的外径移动，直到致动器臂卸载到斜坡上。

公开(公告)号：US07573670B1

公开(公告)日：2009-08-11

申请号：US11862825

申请日：2007-09-27

申请人： Robert P. Ryan ,  Terry C. Dawson ,  Ashok K. Desai

发明人： Robert P. Ryan ,  Terry C. Dawson ,  Ashok K. Desai

IPC分类号： G11B21/02

CPC分类号： G11B21/12

摘要： A disk drive is disclosed including a disk having a plurality of tracks, wherein each track comprises a plurality of embedded servo sectors. A head connected to a distal end of an actuator arm is rotated about a pivot by a voice coil motor (VCM) in order to actuate the head radially over the disk. The actuator arm is unloaded onto a ramp by seeking the head to a track near an outer diameter of the disk in response to the embedded servo sectors, switching to a velocity control mode to unload the actuator arm onto the ramp at a controlled unload velocity in response to a back electromotive force voltage generated by the VCM, and ramping a velocity command so that the velocity of the actuator arm when contacting the ramp is less than half the maximum unload velocity while traveling along the ramp.

摘要翻译： 公开了一种磁盘驱动器，其包括具有多个磁道的磁盘，其中每个磁道包括多个嵌入式伺服扇区。 连接到致动器臂的远端的头部通过音圈电机（VCM）围绕枢轴旋转，以便在磁盘上径向驱动头部。 通过响应于嵌入的伺服扇区，将头部附接到盘的外径附近的轨道，将执行器臂卸载到斜坡上，切换到速度控制模式，以将控制的卸载速度卸载到斜坡上 响应于由VCM产生的反电动势电压，以及斜坡速度命令，使得当接触斜坡时致动器臂的速度小于沿斜坡行进的最大卸载速度的一半。