Torque Amplification with Bias Current for Stiction
Original Publication Date: 1996-Jul-01
Included in the Prior Art Database: 2005-Mar-31
Hard Disk Drive (HDD) fails to spin up due to excessive stiction between a slider and a disk. 'Torque Amplification' is a microcode based procedure that is executed when the HDD fails to start up normally. The HDD is excited by a pulsating force achieved by turning the motor on/off (max/zero) repeatedly, that is to drive the spindle motor so as to amplify the available torque via mechanical resonances to break free the stuck sliders.