Abstract: A rotary actuator arm assembly for positioning a transducer over a data track of at least one rotating magnetic disk. The actuator includes self contained spacers with semi-kinematic mounting features to accurately locate and secure a set of self-aligning components, thereby eliminating azimuth alignment problems created by conventional assembly procedures.

Abstract: A method for loading single head in a hard disk drive includes the following steps: mounting a head assembly (30) in a baseplate (10) of a hard disk drive, the head assembly comprising an actuator arm (32), a suspension (34) and a HGA, the baseplate engaging a motor (110) and the HGA is positioned close to the motor; biasing the suspension by a mounting tool (50) from the original position, the mounting tool comprising a cantilever arm (52), a pressing head (54) and a supporting rod (56), wherein, the mounting tool rotates to the suspension and gets down to press the suspension; mounting a disk (90) on the motor in the baseplate; and releasing the pressing head from the suspension, loading the HGA of the head assembly to a parking zone of the disk.

Abstract: A packaging arrangement for smoothly and conveniently providing small hardware items to an assembly line operator is described. The items are fastened onto a flexible band, lined up in the order in which they are to be installed on an article being assembled. The band is divided into equal segments defined by index marks, each segment containing the hardware items required for the assembly of one article. The items are fastened to the band off-line using securing features fashioned from the band itself in a manner and orientation by which each item can be plucked from the band with a tool that can grasp the item, pull it off the band, transport it to the article being assembled, and install it on the article without intermediate disengagement from the tool. The utilization of the band improves the productivity and reliability of manually assembled articles such as disk drives.

Abstract: A Hard Disk Drive anti-shock and anti-vibration device and a Data Storage Device consisting of a HDD and the HDD anti-shock and anti-vibration device are described. The HDD anti-shock and anti-vibration device includes a packaging paper and foam. The foam is adhered on the packaging paper. When this packaging paper, with the foam adhering onto it, is folded, it can wrap the HDD in the foam. This HDD anti-shock and anti-vibration device can prevent the HDD from damage when the HDD is accidentally dropped or bumped and has excellent anti-shock and anti-vibration effects.

Abstract: a seek procedure for a hard disk drive which provides a significant reduction in acoustic noise as well as high performance fast seek times is described. The seek procedure lowers the peak acceleration for short seeks and imparts a smooth transition from a sine seek to an exponential arrival at the target track. The seek procedure provides an error free feedforward signal derived from a single sine table. The procedure which contains a time domain sinusoid acceleration feedforward combined with a phase-plane trajectory controlled velocity which, near seek completion. The procedure is constructed so that the acceleration begins at zero and, in the fashion of a sine, increases to a maximum, decreases to a minimum and then increases again until a computed switchpoint is reached. The switchpoint is determined in-situ, to provide a smooth and continuous velocity transition from sinusoid to exponential. The velocity trajectory is computed from a look-up table.

Abstract: A method for operating a fixed media hard disk drive using a plurality of disks on each of which the ratio of servo track pitch to data track pitch is smoothly varied across the surface of the disk as data is being written. The method allows the density of data on each disk to be independently varied, the total data capacity of a disk to be independently varied and introduces a degree of flexibility into the process of testing disk formatting. The method includes the use of a smooth and continuous function having a set of adjustable parameters, by whose definition a relationship between the two pitches is established within the data band. The method can also be applied to disks that are divided into radial zones to take advantage of additional properties of data writing and reading within a hard disk drive.

Abstract: A method for loading single head in a hard disk drive includes the following steps: mounting a head assembly (30) in a baseplate (10) of a hard disk drive, the head assembly comprising an actuator arm (32), a suspension (34) and a HGA, the baseplate engaging a motor (110) and the HGA is positioned close to the motor; biasing the suspension by a mounting tool (50) from the original position, the mounting tool comprising a cantilever arm (52), a pressing head (54) and a supporting rod (56), wherein, the mounting tool rotates to the suspension and gets down to press the suspension; mounting a disk (90) on the motor in the baseplate; and releasing the pressing head from the suspension, loading the HGA of the head assembly to a parking zone of the disk.

Abstract: In a packaging arrangement for smoothly and conveniently providing small hardware items to an assembly line operator, the items are fastened onto a flexible band, lined up in the order in which they are to be installed on an article being assembled. The band is divided into equal segments defined by index marks, each segment containing the hardware items required for the assembly of one article. The items are fastened to the band off-line using securing features fashioned from the band itself in a manner and orientation by which each item can be plucked from the band with a tool that can grasp the item, pull it off the band, transport it to the article being assembled, and install it on the article without intermediate disengagement from the tool. The utilization of the band improves the productivity and reliability of manually assembled articles such as disk drives.

Abstract: A method of manufacturing a disk drive is disclosed in which servo information is written in tracks on a disk surface, the track width performance of the associated read/write transducer is measured, the track width performance is analyzed and a data track pitch is established. Based on the established track pitch, a track location formula for data tracks on the disk surface is defined. For a disk drive having a plurality of read/write transducers, a track location formula is established for each transducer. A method for measuring track width performance of a read/write head is also disclosed.

Abstract: A method for loading single head in a hard disk drive includes the following steps: mounting a head assembly (30) in a baseplate (10) of a hard disk drive, the head assembly comprising an actuator arm (32), a suspension (34) and a HGA, the baseplate engaging a motor (110) and the HGA is positioned close to the motor; biasing the suspension by a mounting tool (50) from the original position, the mounting tool comprising a cantilever arm (52), a pressing head (54) and a supporting rod (56), wherein, the mounting tool rotates to the suspension and gets down to press the suspension; mounting a disk (90) on the motor in the baseplate; and releasing the pressing head from the suspension, loading the HGA of the head assembly to a parking zone of the disk.

Abstract: A data storage device (10) includes a stator (20), a rotor (50) rotatable about the stator via a pair of bearings (26), a cover (70), and two data storage disks (80). The stator includes a baseplate (22), and radially extending stator laminations (32) under the baseplate. The bearings are fixed in top and bottom ends of the baseplate. The rotor includes a spindle shaft (52), a hub (54), and a drive member (56). The shaft is fixed in the bearings, and the hub is fixed to a top end of the shaft. The drive member is fixed to a bottom end of the shaft, at a side of the baseplate opposite from the hub. The cover is fixed to a bottom of the baseplate, surrounding the drive member. The cover helps prevent contaminants such as dust from entering a clean chamber of the data storage device that surrounds the shaft.

Abstract: A hard disk drive (1) includes a baseplate (10), a disk stack (90), a head stack (50), a spindle motor (80) and a connector assembly. The connector assembly includes a connector (100) and a circuit board (140). The connector includes a insulative base (110) and a plurality of contacts (124, 126, 128) extending from the insulative base and being soldered to the circuit board at one end thereof. The baseplate receiving the circuit board and the connector, includes a bottom wall (36), two side walls (39) and two separating walls (34) extending perpendicularly from the bottom wall. The insulative base of the connector, the bottom wall, the two side walls and the two separating walls corporately form three contacts receiving housing.

Abstract: A data storage device includes a baseplate (10), a head stack (50), a disk stack (90), a spindle motor (80) first damper (20) and second dampers (30). The head stack is received in the baseplate with the second damper underlying between the head stack and the baseplate. The disk stack combined with the spindle motor is received in the baseplate with the first damper underlying between the disk stack and the baseplate for absorbing vibration and improving dynamic head loading property of the data storage device.

Abstract: A data storage device (10) includes a stator (20), a rotor (50) rotatable about the stator via a pair of bearings (26), a cover (70), and two data storage disks (80). The stator includes a baseplate (22), and radially extending stator laminations (32) under the baseplate. The bearings are fixed in top and bottom ends of the baseplate. The rotor includes a spindle shaft (52), a hub (54), and a drive member (56). The shaft is fixed in the bearings, and the hub is fixed to a top end of the shaft. The drive member is fixed to a bottom end of the shaft, at a side of the baseplate opposite from the hub. The cover is fixed to a bottom of the baseplate, surrounding the drive member. The cover helps prevent contaminants such as dust from entering a clean chamber of the data storage device that surrounds the shaft.

Abstract: A data storage device (10) includes a housing enclosing a clean room chamber (CR), a stator (20), a rotor (40), and a plurality of data storage disks (60). The housing includes an upper partition (12) and a lower partition (14). The stator includes a plurality of stator laminations (22) each having a winding (24) wound therearound, and a shaft (30) having opposite ends fixed with the upper partition and the lower partition. The rotor includes a hub (44), a tube (42) fixed in the hub, and a magnet (46) surrounded by the stator laminations. The hub includes a radially extending shoulder (45) for supporting the disks thereon. The tube surrounds the shaft, with a pair of bearings (50) rotatably connecting the tube to the shaft. A clamp (80) is secured on the hub, and presses on a top one of the disks to mount the disks to the hub.

Abstract: A data storage device (10) includes a stator (20), a rotor (40), a disk (80), and a clamp (60) attaching the disk to the rotor. The rotor includes a hub (48) forming a shoulder (57) at a top portion thereof. A recess (56) is defined in the top portion of the hub and surrounded by the shoulder. An outer diameter of the recess is equal to or larger than a diameter of a central opening (82) of the disk. The disk is seated on the shoulder of the hub. The clamp includes a bottom fixing part (62) fixedly attached to the hub in the recess, a cylindrical wall (64) abutting an inside of the shoulder and the disk in the central opening, and a pressing part (66) extending through the central opening of the disk and pressing on the disk thereby ensuring that the disk can rotate with the rotor.