Patent ID: 6785072
Filing Date: 2004-08-31
Classification: G11B

Abstract:
A method of measuring stiction and friction forces developed between a transducer head and a disc during a spin-up, comprising steps of:(a) attaching a piezoelectric transducer on to an actuator assembly supporting the head; (b) coupling an external processor to the piezoelectric transducer; (c) starting the disc to spin-up; (d) sensing signals from the piezoelectric transducer during the disc spin-up; and (e) analyzing the signals for the stiction and friction forces developed between the transducer head and the disc during the spin-up, the analyzing step comprising: (e)(i) conditioning the signals coming from the piezoelectric transducer by filtering and amplifying signals of interest from the sensed signals coming from the piezoelectric transducer; (e)(ii) converting the conditioned signals to digital signals; and (e)(iii) analyzing the digitized signals for stiction and friction forces.