Abstract: A data storage device comprises a lead actuator that actuates a first read-write head over a first disk and a support actuator that actuates a second read-write head over a second disk. A spindle motor rotates the first and second disks. In response to an emergency power off (EPO) event, a processing device retracts and parks the actuators using an internal supply voltage generated from a back electromotive force (BEMF) voltage of the spindle motor, and brakes the spindle motor. The spindle motor is not braked until both the lead and support actuators have been retracted and parked.

Abstract: An electronic component protection structure and a switch device capable of protecting an electronic component from static electricity charged on or within a case member are achieved with a simple configuration. An electronic component protection structure includes a circuit board on which an electronic component is mounted, a base member supporting the circuit board, a case member covering the circuit board and fixed to the base member, and a conductive ground member connected to the circuit board. The ground member includes an exposed portion at least a part of which is exposed to the inside of the case member.

Abstract: Problem Provided is a heating coil for high-frequency heater that is not easily damaged, has good cooling efficiency for a material to be worked, and can be inexpensively and easily manufactured having the same property with good reproducibility during manufacturing even when output of the high-frequency power supply is increased. Solution A heating coil 1 is integrally formed by a modeling method repeating laying, melting, solidifying, and laminating of a powder containing a conductive material based on three-dimensional data, and includes a pair of plate-shaped grounding portions 2a, 2b, a pair of plate-shaped supporting portions 3a, 3b, and an annular heating unit 4. The pair of grounding portions 2a, 2b are for contact with an electrode through which a high-frequency current is flowed. The pair of plate-shaped supporting portions 3a, 3b are disposed to be perpendicular to the respective grounding portions 2a, 2b.

Abstract: A wire harness includes: an apparatus connector connected to a connector of an apparatus; a first harness connector connected to a connector of a first counterpart wire harness; a second harness connector connected to a connector of a second counterpart wire harness; a first apparatus wiring connecting the apparatus connector and the first harness connector; a second apparatus wiring connecting the apparatus connector and the second harness connector; and a flat base member holding the first apparatus wiring and the second apparatus wiring.

Abstract: Various illustrative aspects are directed to a data storage device comprising one or more disks, an actuator arm assembly comprising one or more disk heads and a voice coil motor (VCM), the VCM configured to operate in a PWM mode and a linear mode, and one or more processing devices configured to: seek the VCM towards a target track in the PWM mode; transition the VCM from the PWM mode to the linear mode, wherein the transitioning comprises switching an offset compensation value from a first offset compensation value to a second compensation offset value to compensate for a transition offset induced while transitioning the VCM from the PWM to the linear mode, wherein the first and the second offset compensation values correspond to the PWM and linear modes, respectively, and seek the VCM towards the target track in the linear mode for a linear mode time.

Abstract: The posture of a work machine is computed on the basis of posture information about the work machine output from a posture measurement device. A loading area which is an area where a transporting machine stops and where loading work by the work machine to load the transporting machine is performed is set. On the basis of the posture of the work machine, it is assessed whether or not the work machine can sense, with an external environment measurement device, the transporting machine having stopped in the loading area. When it is assessed that the work machine can sense the transporting machine, the transporting machine is sensed on the basis of measurement information output from the external environment measurement device. Accordingly, it is possible to more accurately sense the position of the vessel of the stopped transporting machine and to appropriately assist loading work by the work machine.

Abstract: Problem Provided is a heating coil for a high-frequency heater that is excellent in cooling efficiency, allowed to be continuously used for a long period of time without a damage even under a high output condition, and allowed to be manufactured in the same characteristics with good reproducibility in the manufacture. Solution A heating coil 1 is integrally formed by a modeling method repeating laying, melting, solidifying, and laminating of a powder containing a conductive material based on three-dimensional data. The heating coil 1 includes a pair of plate-shaped grounding portions 2a, 2b for contact with an electrode that generates a high-frequency current, a pair of plate-shaped supporting portions 3a, 3b disposed to be perpendicular to the grounding portions 2a, 2b, respectively, and an annular heating unit 4 disposed to connect distal ends of the supporting portions 3a, 3b to one another.

Abstract: Operations of an upper swing structure and a front work device are controlled such that a swing operation of the upper swing structure starts after a work tool starts only a lifting operation. The lifting operation and the swing operation are performed until the work tool reaches a height position of a passing position and only the swing operation is performed after the work tool reaches the height position of the passing position. The swing operation of the upper swing structure starts to decelerate at a swing deceleration start position, and only the swing operation is performed until the work tool reaches a swing position of the passing position to pass through the passing position. Accordingly, it is possible to reduce the discomfort feeling of an operator while realizing interference prevention at the time of a loading operation and a stop during the loading operation.

Abstract: A data storage device has a closed loop extended park mode during spin down operation. A data storage device comprises a spindle motor configured to rotate one or more disks, and one or more processing devices. The one or more processing devices are configured to determine a value of current that is discharged from the spindle motor over time during a spin down of the spindle motor, and control a braking duty cycle for braking the spindle motor during the spin down such that the value of current discharged from the spindle motor over time does not exceed a selected current limit.

Abstract: Various illustrative aspects are directed to a data storage device comprising one or more disks, an actuator arm assembly comprising a voice coil motor (VCM), the VCM configured to operate in a first mode and a second, different mode, wherein the first mode corresponds to at least a first and a second setting, and a control circuitry configured to cause the VCM to seek towards a target track in the first mode using the first setting for a first duration, control transition of the VCM from the first to the second setting in the first mode, cause the VCM to seek towards the target track using the second setting for a second duration, and control transition of the VCM from the first to a second mode, wherein controlling the transitioning comprises seeking the VCM toward the target track in the second mode for a third duration.

Abstract: Various illustrative aspects are directed to a data storage device comprising one or more disks, an actuator arm assembly comprising a voice coil motor (VCM), the VCM configured to operate in a first mode and a second, different mode, wherein the first mode corresponds to at least a first and a second setting, and a control circuitry configured to cause the VCM to seek towards a target track in the first mode using the first setting for a first duration, control transition of the VCM from the first to the second setting in the first mode, cause the VCM to seek towards the target track using the second setting for a second duration, and control transition of the VCM from the first to a second mode, wherein controlling the transitioning comprises seeking the VCM toward the target track in the second mode for a third duration.

Abstract: Various illustrative aspects are directed to a data storage device comprising a first spindle motor configured to rotate one or more disks in a first stack of disks, a second spindle motor configured to rotate one or more disks in a second stack of disks, and one or more processing devices configured to detect back electromotive force (BEMF) voltages generated by the first spindle motor and the second spindle motor. In other aspects the one or more processing devices can control speeds of the first spindle motor and the second spindle motor based on the detected BEMF voltages.

Abstract: Various illustrative aspects are directed to a data storage device comprising a disk and a spindle motor configured to rotate the disk wherein the spindle motor is powered by a drive voltage generated in response to a host voltage. The data storage device includes a head configured to be actuated over the disk by a head actuator and control circuitry comprising an isolation field effect transistor (ISOFET) configured to prevent a reverse current from flowing from the drive voltage to the host voltage when the host voltage falls below a threshold. The control circuitry sets a turnoff current level at which the ISOFET is directed to turn off to prevent the reverse current from flowing determines a drain-source on resistance Rdson of the ISOFET, and calculates a voltage turnoff threshold at which the ISOFET is turned off from the turnoff current level and the determined Rdson.

Abstract: A data storage device comprises a lead actuator that actuates a first read-write head over a first disk and a support actuator that actuates a second read-write head over a second disk. A spindle motor rotates the first and second disks. In response to an emergency power off (EPO) event, a processing device retracts and parks the actuators using an internal supply voltage generated from a back electromotive force (BEMF) voltage of the spindle motor, and egresses data from a volatile to a non-volatile semiconductor memory. Egress is throttled before the actuators are retracted and parked when the internal supply voltage falls to or below a first egress throttling threshold voltage. Egress is throttled after the actuators are retracted and parked when the internal supply voltage falls to or below a second egress throttling threshold voltage.

Abstract: Various illustrative aspects are directed to a data storage device comprising one or more disks, an actuator arm assembly comprising one or more disk heads and a voice coil motor (VCM), the VCM configured to operate in a PWM mode and a linear mode, and one or more processing devices configured to: seek the VCM towards a target track in the PWM mode; transition the VCM from the PWM mode to the linear mode, wherein the transitioning comprises switching an offset compensation value from a first offset compensation value to a second compensation offset value to compensate for a transition offset induced while transitioning the VCM from the PWM to the linear mode, wherein the first and the second offset compensation values correspond to the PWM and linear modes, respectively, and seek the VCM towards the target track in the linear mode for a linear mode time.

Abstract: A data storage device comprises a lead actuator that actuates a first read-write head over a first disk and a support actuator that actuates a second read-write head over a second disk. A spindle motor rotates the first and second disks. In response to an emergency power off (EPO) event, a processing device retracts and parks the actuators using an internal supply voltage generated from a back electromotive force (BEMF) voltage of the spindle motor, and brakes the spindle motor. The spindle motor is not braked until both the lead and support actuators have been retracted and parked.

Abstract: Various illustrative aspects are directed to a data storage device comprising a first spindle motor configured to rotate one or more disks in a first stack of disks, a second spindle motor configured to rotate one or more disks in a second stack of disks, and one or more processing devices configured to detect back electromotive force (BEMF) voltages generated by the first spindle motor and the second spindle motor. In other aspects the one or more processing devices can control speeds of the first spindle motor and the second spindle motor based on the detected BEMF voltages.

Abstract: Various illustrative aspects are directed to a data storage device comprising a disk and a spindle motor configured to rotate the disk wherein the spindle motor is powered by a drive voltage generated in response to a host voltage. The data storage device includes a head configured to be actuated over the disk by a head actuator and control circuitry comprising an isolation field effect transistor (ISOFET) configured to prevent a reverse current from flowing from the drive voltage to the host voltage when the host voltage falls below a threshold. The control circuitry sets a turnoff current level at which the ISOFET is directed to turn off to prevent the reverse current from flowing determines a drain-source on resistance Rdson of the ISOFET, and calculates a voltage turnoff threshold at which the ISOFET is turned off from the turnoff current level and the determined Rdson.

Abstract: A perforating apparatus for a cylindrical workpiece, including: a cradle having a groove extending in one direction horizontally from one end to another end; a stopper provided at the one end of the groove; a drill disposed vertically above the groove and movable at least in vertical direction, having a drill bit that extends vertically; and a chuck having a pair of opposing grippers movable toward each other in a horizontal direction perpendicular to the direction in which the groove extends, and symmetrically with respect to a rotation axis of the drill bit, each of the grippers further having a pair of vertically symmetric inclined surfaces expanding upwards and downwards.

Abstract: A data storage device comprises a lead actuator that actuates a first read-write head over a first disk and a support actuator that actuates a second read-write head over a second disk. A spindle motor rotates the first and second disks. In response to an emergency power off (EPO) event, a processing device retracts and parks the actuators using an internal supply voltage generated from a back electromotive force (BEMF) voltage of the spindle motor, and egresses data from a volatile to a non-volatile semiconductor memory. Egress is throttled before the actuators are retracted and parked when the internal supply voltage falls to or below a first egress throttling threshold voltage. Egress is throttled after the actuators are retracted and parked when the internal supply voltage falls to or below a second egress throttling threshold voltage.