US 5,796,558 A · Adaptive micro-actuated head gimbal assembly

Abstract

A disk drive has a head stack assembly with head arms which extend between adjacent magnetic disks. Each head arm includes head gimbal assemblies. The head arm is capable of pivoting about a first axis of rotation for providing the head gimbal assembly with a macro-actuation movement relative to a selected track on a disk, and for positioning the head gimbal assembly in an initial position relative to the selected track. A micro-actuator is connected to the head gimbal assembly so that the head gimbal assembly is pivotally secured to the head arm about a second axis independently of the pivotal movement of the head arm. This provides the head gimbal assembly with a micro-actuation movement relative to the selected track, such that if there is skew between the head gimbal assembly and the track, a micro-actuator provides correction to minimize the skew angle. Also the micro-actuator provides cancellation of transient and harmonic vibrations.

Claims20

Dependent claims

A drive comprising:

a head gimbal assembly including a head;
an actuator arm pivotally movable about a first actuator axis of rotation, for providing said head gimbal assembly with a macro-actuation movement relative to a destination track, and for positioning said head in an initial position relative to said destination track;
said head gimbal assembly being pivotally secured to said actuator arm about a second actuator axis of rotation, for moving said head in a micro-actuation movement relative to said destination track, when said head reaches said initial position, in order to minimize a skew angle formed between said head and said destination track, at said initial position.

Dependencies are inferred from the claim text.

Adaptive micro-actuated head gimbal assembly

Life of this patent

Adaptive micro-actuated head gimbal assembly

Life of this patent

Abstract

Claims20