Patent ID: 11948603
Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 13:
14. A data storage device comprising:
one or more disks;
an actuator arm assembly comprising one or more disk heads and a first voice coil motor (VCM), the first VCM configured to operate in a pulse width modulation (PWM) mode; and
one or more processing devices, configured to:
perform a calibration routine, wherein performing the calibration routine comprises:
identifying a mapping between pairs of setting values for the PWM mode and a track arrival position error signal (PES), wherein each pair of setting values translates to a current offset applied to the first VCM in the PWM mode,
and wherein the mapping is identified by:
measuring the track arrival PES for different pairs of setting values after seek completion, and
incrementally reducing a PWM change time and measuring a corresponding track arrival PES.