Abstract: A system, methods, and apparatus having a circular buffer for the reply of renal therapy machine alarms and events are disclosed. An example renal therapy apparatus includes a therapy operations processor configured to generate alarms, events, and high fidelity medical device data. The renal therapy apparatus also includes a memory device having a circular buffer configured to store a duration of medical device data. The renal therapy apparatus further includes a control processor configured to receive a stream of medical device data from the therapy operations processor, and write the stream to the circular buffer such that a most recent duration of the stream is stored. The control processor is also configured to detect an occurrence of an alarm or event, and create a reply record that includes an identifier of the alarm or event and the medical device data that is stored in the circular buffer.

Abstract: Treatment apparatus with liquid level controls for gas separation devices used to separate gas bubbles from liquids are described herein along with methods of controlling the level of liquids in the gas separation devices. The gas separation devices may be used in liquid treatment apparatus to separate gas bubbles from one or more liquids such as, e.g., physiological liquids (e.g., blood, etc.).

Abstract: In one implementation, an assembly for testing a head gimbal assembly comprises a rotatable test disc, a mounting surface configured to mount the head gimbal assembly, and a shroud covering the head gimbal assembly. The mounting surface is located in proximity to the test disc to facilitate loading the head gimbal assembly on the test disc. The shroud is configured to shield the head gimbal assembly from airflow produced when the test disc rotates.

Abstract: In one implementation, an assembly for testing a head gimbal assembly comprises a rotatable test disc, a mounting surface configured to mount the head gimbal assembly, and a shroud covering the head gimbal assembly. The mounting surface is located in proximity to the test disc to facilitate loading the head gimbal assembly on the test disc. The shroud is configured to shield the head gimbal assembly from airflow produced when the test disc rotates.

Abstract: A method for dynamic electrical testing of head gimbal assemblies may include initiating an automated continuous process that includes selecting an unmounted head gimbal assembly; aligning the unmounted head gimbal assembly; loading the unmounted head gimbal assembly to a disc; and testing the unmounted head gimbal assembly.

Abstract: An assembly for testing a head gimbal assembly (HGA) comprises a support platform configured to hold a base plate of the HGA. A base plate of the HGA is mounted on the support platform. The assembly further comprises a channel with an opening adjacent to a tail of the HGA and a vacuum source connected the channel. The vacuum source creates a negative pressure in the channel to secure the tail of the HGA to the opening of the channel. Embodiments of the invention may be useful to inhibit vibration in the tail of an HGA, which may also reduce vibration in the head of the HGA. Reducing vibration in the head of the HGA may increase the accuracy and precision of tests performed on the HGA using the assembly.

Abstract: A method for dynamic electrical testing of head gimbal assemblies may include initiating an automated continuous process that includes selecting an unmounted head gimbal assembly; aligning the unmounted head gimbal assembly; loading the unmounted head gimbal assembly to a disc; and testing the unmounted head gimbal assembly.

Abstract: An assembly for testing a head gimbal assembly (HGA) comprises a support platform configured to hold a base plate of the HGA. A base plate of the HGA is mounted on the support platform. The assembly further comprises a channel with an opening adjacent to a tail of the HGA and a vacuum source connected the channel. The vacuum source creates a negative pressure in the channel to secure the tail of the HGA to the opening of the channel. Embodiments of the invention may be useful to inhibit vibration in the tail of an HGA, which may also reduce vibration in the head of the HGA. Reducing vibration in the head of the HGA may increase the accuracy and precision of tests performed on the HGA using the assembly.

Abstract: A method for dynamic electrical testing of head gimbal assemblies may include initiating an automated continuous process that includes selecting an unmounted head gimbal assembly; aligning the unmounted head gimbal assembly; loading the unmounted head gimbal assembly to a disc; and testing the unmounted head gimbal assembly.

Abstract: A method for dynamic electrical testing of head gimbal assemblies may include initiating an automated continuous process that includes selecting an unmounted head gimbal assembly; aligning the unmounted head gimbal assembly; loading the unmounted head gimbal assembly to a disc; and testing the unmounted head gimbal assembly.

Abstract: A method for dynamic electrical testing of head gimbal assemblies may include initiating an automated continuous process that includes selecting an unmounted head gimbal assembly; aligning the unmounted head gimbal assembly; loading the unmounted head gimbal assembly to a disc; and testing the unmounted head gimbal assembly.

Abstract: A method for dynamic electrical testing of head gimbal assemblies may include initiating an automated continuous process that includes selecting an unmounted head gimbal assembly; aligning the unmounted head gimbal assembly; loading the unmounted head gimbal assembly to a disc; and testing the unmounted head gimbal assembly.

Abstract: A method for dynamic electrical testing of head gimbal assemblies may include initiating an automated continuous process that includes selecting an unmounted head gimbal assembly; aligning the unmounted head gimbal assembly; loading the unmounted head gimbal assembly to a disc; and testing the unmounted head gimbal assembly.

Abstract: A method for dynamic electrical testing of head gimbal assemblies may include initiating an automated continuous process that includes selecting an unmounted head gimbal assembly; aligning the unmounted head gimbal assembly; loading the unmounted head gimbal assembly to a disc; and testing the unmounted head gimbal assembly.

Abstract: A retractable grounding device for a spindle motor having a rotor shaft is provided. The retractable grounding device includes a grounding connector configured to connect the rotor shaft to ground and a position adjuster coupled to the grounding connector. The position adjuster moves the grounding connector between a first position where the grounding connector is in contact with the rotor shaft and a second position where the grounding connector is retracted from the rotor shaft. In addition, a method of selectively grounding a rotor shaft of a spindle motor is provided.

Abstract: A retractable grounding device for a spindle motor having a rotor shaft is provided. The retractable grounding device includes a grounding connector configured to connect the rotor shaft to ground and a position adjuster coupled to the grounding connector. The position adjuster moves the grounding connector between a first position where the grounding connector is in contact with the rotor shaft and a second position where the grounding connector is retracted from the rotor shaft. In addition, a method of selectively grounding a rotor shaft of a spindle motor is provided.