Resonance control method for a disc drive actuator assembly having discrete bearings

摘要

A method of measuring the vibration of an actuator assembly in a disc drive in the plane of rotation of the actuator assembly and determining the resonance behavior of the actuator assembly from the measured vibrations is disclosed. The method involves use of a laser to measure the vibrational behavior of the actuator assembly in the rotational plane. A method is described for adjusting the resonance behavior of the actuator assembly during the manufacturing process without the use of glue or extra parts. The resonance behavior is determined and the preload on the bearings in the actuator assembly is adjusted until a desired resonance behavior is achieved.