US Patent Application 18446612. VCM PWM TO LINEAR MODE TRANSITION OFFSET OPTIMIZATION TO IMPROVE PES simplified abstract

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VCM PWM TO LINEAR MODE TRANSITION OFFSET OPTIMIZATION TO IMPROVE PES

Organization Name

Western Digital Technologies, Inc.

Inventor(s)

Jaesoo Byoun of Irvine CA (US)

Brian Johnson of Laguna Hills CA (US)

Hideaki Ito of Fujisawa-shi (JP)

Gaku Ikedo of Fujisawa-shi (JP)

Naoyuki Kagami of Fujisawa-shi (JP)

VCM PWM TO LINEAR MODE TRANSITION OFFSET OPTIMIZATION TO IMPROVE PES - A simplified explanation of the abstract

This abstract first appeared for US patent application 18446612 titled 'VCM PWM TO LINEAR MODE TRANSITION OFFSET OPTIMIZATION TO IMPROVE PES

Simplified Explanation

The abstract describes a data storage device with disks, a motor, and processing devices.

  • The device has disks and a motor with disk heads that can operate in a PWM mode and a linear mode.
  • The processing devices control the motor to move the disk heads to a target track.
  • The motor transitions from PWM mode to linear mode, compensating for a transition offset.
  • The motor then moves the disk heads to the target track in the linear mode for a specific time.


Original Abstract Submitted

Various illustrative aspects are directed to a data storage device comprising one or more disks, an actuator arm assembly comprising one or more disk heads and a voice coil motor (VCM), the VCM configured to operate in a PWM mode and a linear mode, and one or more processing devices configured to: seek the VCM towards a target track in the PWM mode; transition the VCM from the PWM mode to the linear mode, wherein the transitioning comprises switching an offset compensation value from a first offset compensation value to a second compensation offset value to compensate for a transition offset induced while transitioning the VCM from the PWM to the linear mode, wherein the first and the second offset compensation values correspond to the PWM and linear modes, respectively, and seek the VCM towards the target track in the linear mode for a linear mode time.

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