摘要:
A spindle motor assembly for a hard disk drive which has a fluid filled tube that dynamically balances the spindle motor. The assembly may include a hub which is rotated by an internal motor. A plurality of disks may be coupled to the hub and separated by a number of spacers. In one embodiment, the fluid filled tube is attached to the hub. In another embodiment, the fluid filled tube is attached to the spacer. The fluid within the tube is allowed to move during rotation of the hub. Movement of the fluid may dynamically balance the spindle motor.
摘要:
The invention includes a disk damper containing an extended area located on the upstream side of the head stack assembly. The extended area is joined to a tail section. In the extended area, the disk damper provides a wall near the neighboring rotating disk surface that extends from the outside diameter to the inside diameter of the rotating disk surface. Experimental results have shown that this provides much more consistent dampening of disk vibrations and vibrations of a head stack assembly positioned anywhere from the inside diameter to the outside diameter. The hard disk drive including the disk damper. Using the disk damper in a hard disk drive to improve the reliability of the hard disk drive during track following. Making the hard disk drive using the disk damper, and the hard disk drive as a product of that manufacturing process.
摘要:
Micro-actuator assembly including micro-actuator mount coupled to micro-actuator bridge to provide merged footprint with slider and micro-actuator bridge gap. Flexure finger including micro-actuator assembly for coupling to slider. Head gimbal assembly including flexure finger coupled to the slider. A head stack assembly including at least one of the head gimbal assemblies coupled to a head stack. Hard disk drive including head stack assembly. The invention includes manufacturing the micro-actuator assembly, the flexure finger, the head gimbal assembly, the head stack assembly, and the hard disk drive, as well as these items as products of the invention's manufacturing processes.
摘要:
A piezoelectric sensor-actuator, including a piezoelectric sensor bonded through non-conductive adhesive to a piezoelectric actuator to determine the pressure and/or temperature near the coupled slider. The piezoelectric actuator contributes to slider positioning. The piezoelectric sensor determines the experienced stress-strain. The hard disk drive uses the piezoelectric sensor-actuator creates a stress-strain measurement, a sensor spectrum, deriving the temperature estimate and/or the pressure estimate from said sensor spectrum, and operating at least one positioning control group member based upon the temperature estimate and/or pressure estimate. The micro-actuator containing at least one of the piezoelectric sensor-actuators, flexure finger, head gimbal assembly, head stack assembly, an actuator assembly, an embedded circuit, and the hard disk drive. The invention includes manufacturing methods and the piezoelectric sensor-actuator, the micro-actuator, the head gimbal assembly, the actuator assembly, the head stack assembly, the embedded circuit, and the hard disk drive as products.
摘要:
Micro-actuator assembly including micro-actuator mount coupled to micro-actuator bridge to provide merged footprint with slider and micro-actuator bridge gap. Flexure finger including micro-actuator assembly for coupling to slider. Head gimbal assembly including flexure finger coupled to the slider. A head stack assembly including at least one of the head gimbal assemblies coupled to a head stack. Hard disk drive including head stack assembly. The invention includes manufacturing the micro-actuator assembly, the flexure finger, the head gimbal assembly, the head stack assembly, and the hard disk drive, as well as these items as products of the invention's manufacturing processes.
摘要:
A hard disk drive that includes a disk, a head, and a filter enclosed by a base plate and a cover plate. The base plate has a filter wall with a fore end and an aft end. The fore end of the filter wall has a tapered surface that extends to an apex. The distal end of the filter wall has a first filter attachment portion separated from a second filter attachment portion by a groove. The second filter attachment portion may be longer than the first filter attachment portion. The filter wall induces a flow of air that inhibits particle attachment to a reverse side of the filter.
摘要:
Disclosed is a hard disk drive that includes at least one disk enclosed by a cover and a disk. A damper is separated from the disk by an air gap about 1.0 mm. The damper and air gap reduce the velocity of the air flow and any vibration associated with the flow of air.
摘要:
A hard disk drive with a circuit that provides a control signal to a voice coil motor to move a head across a disk. The circuit includes a repeatable run-out estimator in a feed forward control loop to control the movement of the head. The repeatable run-out estimator compensates for a constant bias torque disturbance in the drive.
摘要:
A hard disk drive that includes a voice coil motor and a micro-actuator. The micro-actuator is controlled by a servo that utilizes a micro-actuator controller and a corresponding micro-actuator transfer function. The servo enters a mode to self-determine at least one transfer function coefficient of the micro-actuator controller.
摘要:
RRO corrector function is formulated to partition the contribution of micro-actuator control from the other voice coil assembly contributions. Single stage actuation is supported by zeroing the micro-actuator control queue, otherwise multi-stage actuation is supported. The multi-stage actuation may include dual stage actuation and in some embodiments triple stage actuation. Triple stage further partitions RRO corrector function for the contribution of the second micro-actuator. Method of initializing an assembled hard disk drive creates hard disk drive as product, using the written-in parameter list for track on the disk surface to recreate the RRO corrector as RRO corrector filter using queues updated by NRRO corrector.