This disclosure relates to the transport, clamping and testing of disk drives.
Disk drive manufacturers typically test manufactured disk drives for compliance with a collection of requirements. Test equipment and techniques exist for testing large numbers of disk drives serially or in parallel. Manufacturers tend to test large numbers of disk drives simultaneously or in batches. Disk drive testing systems typically include one or more tester racks having multiple test slots that receive disk drives for testing. In some cases, the disk drives are placed in carriers which are used for loading and unloading the disk drives to and from the test racks.
The testing environment immediately around the disk drive is closely regulated. Minimum temperature fluctuations in the testing environment are critical for accurate test conditions and for safety of the disk drives. The latest generations of disk drives, which have higher capacities, faster rotational speeds and smaller head clearance, are more sensitive to vibration. Excess vibration can affect the reliability of test results and the integrity of electrical connections. Under test conditions, the drives themselves can propagate vibrations through supporting structures or fixtures to adjacent units. This vibration “cross-talking,” together with external sources of vibration, contributes to bump errors, head slap and non-repetitive run-out (NRRO), which may result in lower yields and increased manufacturing costs. Current disk drive testing systems employ automation and structural support systems that contribute to excess vibrations in the system and/or require large footprints.
In some cases, in order to combat undesirable vibrations, disk drives are clamped to a carrier and/or to a tester rack in such a manner as to inhibit or dampen vibrations.
In one aspect, a disk drive transporter, for transporting a disk drive and for mounting a disk drive within a test slot, includes a frame configured to receive and support a disk drive. The frame includes a pair of sidewalls configured to receive a disk drive therebetween and sized to be inserted into a test slot along with a disk drive. The frame also includes a clamping mechanism operatively associated with at least one of the sidewalls. The clamping mechanism includes a first engagement element and a first actuator operable to initiate movements of the first engagement element. The first actuator is operable to move the first engagement element into engagement with a test slot after a disk drive being supported by the frame is arranged in a test position in a test slot.
Embodiments can include one or more of the following features. In some embodiments, the first actuator is operable to move the first engagement element into engagement with a disk drive being supported by the frame.
In certain embodiments, the first engagement element includes first and second engagement members. In some cases, the first actuator is operable to initiate movements of the first and second engagement members.
In some embodiments, the first actuator is operable to move the first engagement member into engagement with a test slot after a disk drive being supported by the frame is arranged in a test position in a test slot. In some cases, the first actuator is operable to move the second engagement member into engagement with a disk drive being supported by the frame.
In certain embodiments, the second engagement member includes a dampener. The dampener may include a dampening material selected from thermoplastics and/or rubberthermosets. The dampener may include an isolating or dampening material.
In some embodiments, the first actuator is operable to move the first and second engagement members in substantially opposite directions relative to each other. In some cases, the first actuator is operable to move the first and second engagement members substantially simultaneously.
In certain embodiments, the first engagement element includes a protuberance configured to engage a mating feature in a test slot.
In some embodiments, the first engagement element includes a dampener. The dampener may include a dampening material selected from thermoplastics and/or rubberthermosets.
In certain embodiments, the first engagement element includes a spring clamp. The spring clamp includes a base portion and first and second spring arms. The first and second spring arms each include a proximal end connected to the base portion and a displaceable distal end. In some cases, the actuator is operable to initiate movements of the distal ends of the first and second spring arms.
In some embodiments, the first actuator is pivotable relative to the frame to initiate movements of the first engagement element.
In certain embodiments, the first actuator includes an elongate body extending from a proximal end to a distal end along a first axis. The first actuator is rotatable about the first axis to initiate movements of the first engagement member.
In some embodiments, the first actuator is linearly displaceable relative to the frame to initiate movements of the first engagement member.
In certain embodiments, a first one of the sidewalls defines a first actuator slot, and the first actuator is at least partially disposed within the first actuator slot. In some cases, the first actuator is moveable within the first actuator slot to initiate movements of the first engagement member.
In some embodiments, the clamping mechanism includes a second engagement element, and the first actuator is operable to initiate movements of the second engagement element. In some cases, the first actuator is operable to move the second engagement element into engagement with a test slot after a disk drive being supported by the frame is arranged in a test position in the test slot. In some cases, the first actuator is operable to move the second engagement element into engagement with a disk drive being supported by the frame.
In certain embodiments, the clamping mechanism includes a second engagement element, and a second actuator operable to initiate movements of the second engagement element. In some cases, the second actuator is operable independently of the first actuator to initiate movements of the second engagement element. In certain cases, the second actuator is operable to move the second engagement element into engagement with a test slot after a disk drive being supported by the frame is arranged in a test position in a test slot. In some cases, the second actuator is operable to move the second engagement element into engagement with a disk drive being supported by the frame.
In some embodiments. the first actuator defines actuating features for initiating movements of the first engagement element. In some cases, the actuating features include wedges and recesses.
In certain embodiments, the frame includes a base plate connected to the sidewalls. In some cases, the sidewalls and the base plate together define a substantially U-shaped opening for capturing a disk drive off of a support.
In another aspect, a disk drive test slot includes a housing that defines a test compartment for receiving and supporting a disk drive transporter carrying a disk drive for testing. The housing also defines an open end that provides access to the test compartment for insertion and removal of disk drive transporter carrying a disk drive for testing. The test slot also includes a first engagement element mounted to the housing. The first engagement element is configured to engage a disk drive carried by a disk drive transporter when a disk drive transporter is inserted in the test compartment.
Embodiments can include one or more of the following features. In some embodiments, the first engagement element includes a clamping spring.
In certain embodiments, the first engagement element includes a dampener. In some cases, the dampener is configured to engage a disk drive carried by a disk drive transporter when a disk drive transporter is inserted in the test compartment. In certain cases, the dampener includes a dampening material that includes thermoplastics and rubberthermosets.
In a further aspect, a disk drive testing system includes automated machinery and a disk drive transporter. The disk drive transporter includes a frame configured to receive and support a disk drive. The automated machinery is configured to releasably engage the frame to control movement of the disk drive transporter. The disk drive testing system also includes a loading station for storing disk drives to be tested, and a test slot configured to receive and support a disk drive transporter carrying a disk drive. The automated machinery is operable to remove disk drives from the loading station utilizing the disk drive transporter and insert the disk drive transporter, having a disk drive therein, into the test slot.
Embodiments can include one or more of the following features. In some embodiments, the automated machinery includes a robot. The robot can include, for example, a moveable arm and a manipulator connected to the moveable arm. In some cases, the manipulator is configured to releasably engage the frame to control movement of the disk drive transporter. In certain cases, the robot is operable to remove disk drives from the loading station utilizing the disk drive transporter and insert the disk drive transporter, having a disk drive therein, into the test slot.
In certain embodiments. the frame includes a face plate defining an indentation configured to be releasably engageable by the automated machinery.
In some embodiments, the frame includes a clamping mechanism. In some cases, the clamping mechanism includes a first engagement element and a first actuator operable to initiate movements of the first engagement element. In certain examples, the first actuator is operable to move the first engagement element into engagement with the test slot after a disk drive being supported by the frame is arranged in a test position in the test slot. In certain cases, the automated machinery is configured to control operation of the clamping mechanism. In some cases, the frame includes a pair of sidewalls configured to receive a disk drive therebetween and sized to be inserted into a test slot along with a disk drive for testing of the disk drive. In some examples, the clamping mechanism is operatively associated with at least one of the sidewalls.
In yet another aspect, a disk drive transporter, for transporting a disk drive and for mounting a disk drive within a test slot, includes a frame having a pair of sidewalls configured to receive a disk drive therebetween and sized to be inserted into a test slot along with a disk drive. The frame also includes a base plate connecting the sidewalls. The sidewalls and the base plate together define a substantially U-shaped opening for capturing a disk drive off of a support.
In a further aspect, a method of testing a disk drive includes actuating automated machinery to engage a disk drive transporter; capturing a disk drive with the disk drive transporter; and then actuating the automated machinery to insert the disk drive transporter and the captured disk drive into a test slot. Capturing the disk drive includes moving the disk drive transporter into engagement with the disk drive using the automated machinery.
Embodiments can include one or more of the following features. In certain embodiments, actuating the automated machinery includes actuating a robotic arm.
In some embodiments, the disk drive transporter includes a clamping mechanism operable to clamp the disk drive transporter to the test slot, and the method includes actuating the automated machinery to operate the clamping assembly and thereby clamping the disk drive transporter to the test slot after the disk drive transporter and the captured disk drive are inserted into the test slot.
In certain embodiments, capturing the disk drive includes actuating the automated machinery to move the disk drive transporter into a position underlying the disk drive; and actuating the automated machinery to raise the disk drive transporter into a position engaging the disk drive.
In another aspect, a method of testing a disk drive includes actuating automated machinery to insert a disk drive transporter carrying a disk drive into a test slot, and actuating the automated machinery to operate a clamping mechanism and thereby clamping the disk drive transporter to the test slot after the disk drive transporter and the captured disk drive are inserted into the test slot.
Embodiments can include one or more of the following features. In some embodiments, actuating automated machinery includes actuating a robotic arm.
In certain embodiments, the method may include actuating the automated machinery to engage the clamping assembly and thereby clamping the disk drive transporter to the captured disk drive.
In a further aspect, a test slot assembly includes a test slot and a disk drive transporter. The test slot includes a housing that defines a test compartment, and an open end, which provides access to the test compartment. The disk drive transporter includes a frame configured to receive and support a disk drive. The frame includes a pair of sidewalls configured to receive a disk drive therebetween and sized to be inserted into the test compartment along with a disk drive. The frame also includes a clamping mechanism operatively associated with at least one of the sidewalls. The clamping mechanism includes a first engagement element and a first actuator operable to initiate movements of the first engagement element. The first actuator is operable to move the first engagement element into engagement with the housing after a disk drive being supported by the frame is arranged in a test position in the test compartment.
Embodiments can include one or more of the following features. In some embodiments, the first engagement element includes first and second engagement members, and the first actuator is operable to initiate movements of the first and second engagement members. In some examples, the first actuator is operable to move the first engagement member into engagement with the test slot after a disk drive being supported by the frame is arranged in a test position in the test compartment, and the first actuator is operable to move the second engagement member into engagement with a disk drive being supported by the frame. In some cases, the second engagement member includes a dampener. In some implementations, the first actuator is operable to move the first and second engagement members in substantially opposite directions relative to each other. In some examples, the first actuator is operable to move the first and second engagement members substantially simultaneously.
In certain embodiments, the housing includes a pair of upstanding walls configured to receive the sidewalls of the frame therebetween. In some cases, a first one of the upstanding walls includes an engagement feature, and the first engagement element includes a protuberance configured to engage the engagement feature. In some examples, the first actuator is operable to move the protuberance into engagement with the engagement feature after the sidewalls are inserted into the test compartment.
In still another aspect, a test slot assembly includes a disk drive transporter and a housing. The disk drive transporter includes a frame configured to receive and support a disk drive. The frame includes a pair of sidewalls configured to receive a disk drive therebetween. A first one of the sidewalls defines a pass-through aperture. The housing defines a test compartment for receiving and supporting the disk drive transporter, and an open end providing access to the test compartment for insertion and removal of the disk drive transporter. The test slot assembly also includes a first engagement element mounted to the housing. The first engagement element is configured to extend through the pass-through aperture to engage a disk drive carried by the disk drive transporter when the disk drive transporter is inserted in the test compartment.
In a further aspect, a disk drive testing system includes automated machinery and a disk drive transporter. The disk drive transporter includes a frame configured to receive and support a disk drive. The disk drive transporter also includes a clamping mechanism. The clamping mechanism includes a first engagement element, and a first actuator operable to initiate movements of the first engagement element. The automated machinery is configured to control operation of the clamping mechanism.
Embodiments can include one or more of the following features. In some embodiments, the automated machinery is configured to releasably engage the frame to control movement of the disk drive transporter
In certain embodiments, the automated machinery includes a robot. The robot may include a moveable arm and a manipulator connected to the moveable arm. In some cases, for example, the manipulator is configured to releasably engage the frame to control movement of the disk drive transporter. In some examples, the manipulator is operable to control operation of the clamping mechanism.
In some embodiments, the frame includes a face plate defining an indentation configured to be releasably engageable by the automated machinery.
In another aspect, a method of transporting disk drives for testing includes actuating automated machinery and thereby moving a disk drive transporter carrying a first disk drive between a first test slot and a loading station; and actuating the automated machinery to operate a clamping mechanism such that the disk drive transporter is clamped to the first disk drive during movement between the first test slot and the loading station.
Embodiments can include one or more of the following features. In some embodiments. In certain embodiments, moving the disk drive transporter between the first test slot and the loading station includes moving the disk drive transporter carrying the first disk drive from the loading station to the first test slot.
In some embodiments, moving the disk drive transporter between the first test slot and the loading station includes moving the disk drive transporter carrying the first disk drive from the first test slot to the loading station.
In certain embodiments, actuating the automated machinery to operate the clamping mechanism includes clamping the disk drive transporter to the first disk drive prior to moving the disk drive transporter between the first test slot and the loading station.
In some embodiments, actuating the automated machinery to operate the clamping mechanism includes clamping the disk drive transporter to the first disk drive as the disk drive transporter is being moved between the first test slot and the loading station.
In certain embodiments, the method includes actuating the automated machinery to operate the clamping mechanism and thereby unclamping the disk drive transporter from the first disk drive, and then actuating the automated machinery to insert the disk drive transporter and the first disk drive into the first test slot. The method may also include actuating the automated machinery to operate the clamping mechanism and thereby clamping the disk drive transporter to the first test slot after the disk drive transporter and the first disk drive are inserted into the first test slot.
In some embodiments, the method includes actuating the automated machinery to operate the clamping mechanism and thereby unclamping the disk drive transporter from the first test slot; and then actuating the automated machinery to remove the disk drive transporter from the first test slot. In some cases, the method may also include actuating the automated machinery to operate the clamping mechanism and thereby unclamping the disk drive transporter from the first disk drive prior to removing the disk drive transporter from the first test slot.
In certain embodiments, the method includes actuating the automated machinery to operate the clamping mechanism and thereby unclamping the disk drive transporter from a second test slot; and then actuating the automated machinery and thereby removing the disk drive transporter from the second test slot. In some cases, the method also includes capturing the first disk drive from the loading station with the disk drive transporter after removing the disk drive transporter from the second test slot. Capturing the first disk drive includes moving the disk drive transporter into engagement with the first disk drive using the automated machinery. In some examples, the method also includes actuating the automated machinery to operate the clamping mechanism and thereby unclamping the disk drive transporter from a second disk drive. Removing the disk drive transporter from the second test slot comprises removing the disk drive transporter carrying the second disk drive from the second test slot. The method may also include actuating the automated machinery and thereby moving the disk drive transporter carrying the second disk drive between the second test slot and the loading station, and actuating the automated machinery to operate the clamping mechanism such that the disk drive transporter is clamped to the second disk drive during movements between the second test slot and the loading station. In some cases, the method includes actuating the automated machinery to insert the disk drive transporter and the second disk drive into a disk drive receptacle at the loading station.
In some embodiments, the method includes actuating the automated machinery to insert the disk drive transporter into the first test slot; and then actuating the automated machinery to operate the clamping mechanism and thereby clamping the disk drive transporter to the first test slot after the disk drive transporter is inserted into the first test slot.
In a further aspect, a method of transporting disk drives for testing includes actuating automated machinery and thereby moving a disk drive transporter carrying a first disk drive between a first test slot and a second test slot; and actuating the automated machinery to operate a clamping mechanism such that the disk drive transporter is clamped to the first disk drive during movement between the first test slot and the second test slot.
Embodiments can include one or more of the following features. In some embodiments. In certain embodiments, actuating the automated machinery to operate the clamping mechanism includes clamping the disk drive transporter to the first disk drive prior to moving the disk drive transporter between the first test slot and the second test slot.
In some embodiments, actuating the automated machinery to operate the clamping mechanism includes clamping the disk drive transporter to the first disk drive as the disk drive transporter is being moved between the first test slot and the second test slot.
In certain embodiments, moving the disk drive transporter between the first test slot and the second test slot includes moving the disk drive transporter carrying the first disk drive from the first test slot towards the second test slot. In some cases, the method also includes actuating the automated machinery to operate the clamping mechanism and thereby unclamping the disk drive transporter from the first test slot; and then actuating the automated machinery to remove the disk drive transporter from the first test slot. The method may also include actuating the automated machinery to operate the clamping mechanism and thereby unclamping the disk drive transporter from the first disk drive prior to removing the disk drive transporter from the first test slot.
In some embodiments, the method includes actuating the automated machinery to operate the clamping mechanism and thereby unclamping the disk drive transporter from the first disk drive, and then actuating the automated machinery to insert the disk drive transporter and the first disk drive into the second test slot. In some examples, the method also includes actuating the automated machinery to operate the clamping mechanism and thereby clamping the disk drive transporter to the second test slot after the disk drive transporter and the first disk drive are inserted into the second test slot.
The details of one or more embodiments of the invention are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the invention will be apparent from the description and drawings, and from the claims.
Like reference symbols in the various drawings indicate like elements.
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Each rack 100, in some examples, includes at least one functional testing system 190 in communication with at least one test slot 500. The functional testing system 190 includes a cluster controller 181 and at least one functional interface circuit 191 in electrical communication with the cluster controller (e.g., cluster PC 181). A connection interface circuit 182 is in electrical communication with a disk drive 600 within the test slot 500 and the functional interface circuit 182. The functional interface circuit 182 is configured to communicate a functional test routine to the disk drive 600. The functional testing system 190 may include a communication switch 192 (e.g. Gigabit Ethernet) to provide electrical communication between the cluster controller 181 and the one or more functional interface circuits 182. The computer 130, communication switch 192, cluster controller 181, and functional interface circuit 191 may communicate on an Ethernet network. However, other forms of communication may be used. The functional interface circuit 191 may communicate to the connection interface circuit 182 via Parallel AT Attachment (a hard disk interface also known as IDE, ATA, ATAPI, UDMA and PATA), SATA, or SAS (Serial Attached SCSI).
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The load station 200 also includes totes 220 configured to be removably mounted within the tote receptacles 212a, 212b. As shown in
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The sidewalls 418 are spaced to receive a disk drive 600 (shown in hidden lines) therebetween, and define surfaces 424 for supporting a disk drive 600. The sidewalls 418 also define back hooks 426, which can be useful for extracting the disk drive 600 from a test slot 500 (e.g., for separating a connector on the disk drive from a mating connector in the test slot 500). The sidewalls 418 also define lead-ins 428 (e.g., chamfered edges), which can aid in centering a disk drive 600 in the frame 410.
The sidewalls 418 each define a pair of pass-through apertures 430, which extend between inner and outer surfaces 432a, 432b of the sidewalls 418. Following assembly, a corresponding one of the spring clamps 456a, 456b is associated with each of the pass-through apertures 430. The sidewalls 418 also define actuator slots 434 which extend from a proximal end 435 to a distal end 436 of each sidewall 418. The face plate 412 defines a pair of apertures 437 which extend between the first and second surfaces 414, 420 thereof, and which allow access to the actuator slots 434. The sidewalls 418 also define partial through-holes 438 which provide access to the actuator slots 434 from the outer surfaces 432b of the sidewalls 418.
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In use, one of the disk drive transporters 400 is removed from one of the test slots 500 with the robot 300 (e.g., by grabbing the indentation 416 of the disk drive transporter 400 with the manipulator 312 of the robot 300). As illustrated in
With the disk drive 600 in place within the disk drive transporter 400, the disk drive transporter 400 can be moved by the robotic arm 310 to position the frame 310 and the disk drive 600 within one of the test slots 500. The manipulator 312 is operable to control actuation of the clamping mechanism 450 (e.g., by controlling movements of the actuators 454). This allows the clamping mechanism 450 to be actuated before the disk drive transporter 400 is moved from the tote 220 to the test slot 500 to inhibit movement of the disk drive 600 relative to the disk drive transporter 400 during the move. Prior to insertion, the manipulator 312 can again move the actuators 454 to the release position to allow for insertion of the disk drive transporter 400 into one of the test slots 500. Moving the actuators 454 to the release position prior to insertion also allows the disk drive 600 to move relative to the disk drive transporter 400 during insertion, which can aid in aligning the disk drive connector 610 with the test slot connector 524. The disk drive transporter 400 and disk drive 600 are advanced into the test slot 500, via movement of the robotic arm 310, until the disk drive 600 is in a test position with the disk drive connector 610 engaged with the test slot connector 524. Once the disk drive 600 is in the test position, the actuators 454 are moved to the engaged position (e.g., by the manipulator 312) such that the first engagement members 472 engage the disk drive 600 to clamp the disk drive 600 against movement relative to the disk drive transporter 400 and such that the second engagement members 476 engage the engagement features 527 in the test slot 500 to inhibit movement of the disk drive transporter 400 relative to the test slot 500. The clamping of the disk drive transporter 400 in this manner can help to reduce vibrations during testing.
Following testing, the clamping mechanism can be disengaged by moving the actuators 454 (e.g., with the manipulator 312) to the release position to disengage the engagement members 472, 476 from the disk drive 600 and the test slot 500. Once the clamping mechanism 450 is disengaged the disk drive transporter 400 and disk drive 600 can be withdrawn from the test slot 500, e.g., by engaging the indentation 416 in the face plate 412 with the manipulator 312 and pulling the disk drive transporter 400 out of the test slot 500 with the robotic arm 310. During withdrawal, the back hooks 426 of the sidewalls 418 can help in disengaging the disk drive connector 610 from the test slot connector 524.
The disk drive transporter 400 and the tested disk drive 600 can then be returned to the loading station 200 with the robotic arm 310. In some cases, for example, once the disk drive transporter 400 is sufficiently withdrawn from the test slot 500, the clamping mechanism 450 can again be actuated (e.g., with the manipulator 312) before the disk drive transporter 400 is moved from the test slot 500 to the loading station 200 to inhibit movement of the disk drive 600 relative to the disk drive transporter 400 during the move. The process can be repeated for each of the disk drives in the loading station 200.
Other embodiments are within the scope of the following claims.
For example, while the test slot assemblies described above includes particular mechanisms for clamping with the disk drive transporter, the test slot assemblies can also include other mechanisms for clamping. For example,
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The actuator 710 is rotatable, about the first axis 717, within the actuator slot 712 between an engaged and a release position to initiate movements of the spring clamp 700. As shown in
When the actuator 710 is in the release position, with the spring clamp 700 retracted, a disk drive 600 can be inserted into the frame 410b between the sidewalls 425a, 425b, as shown in
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An actuator 760 is operatively associated with the spring clamp 750. The actuator 760 passes through the face plate 412c and into an actuator slot 762 in the first sidewall 429a. As shown in
The actuator 760 is pivotable within the actuator slot 762 between an engaged position and a release position. As illustrated by
The distal ends 755 of the spring arms 753a, 753b can also be retracted by pivoting the actuator 760 to the release position, as shown in
When the actuator 760 is in the release position, with the spring clamp 760 retracted, a disk drive 600 can be inserted into the frame 410c between the sidewalls 429a, 429b, as shown in
Elements of different embodiments may be combined to form combinations not specifically described herein. Other details and features combinable with those described herein may be found in the following U.S. patent applications filed concurrently herewith, entitled “DISK DRIVE TESTING”, with attorney docket number: 18523-062001, inventors: Edward Garcia et al., and having assigned Ser. No. ______; and “DISK DRIVE TESTING”, with attorney docket number: 18523-064001, inventors: Edward Garcia et al., and having assigned Ser. No. ______, the entire contents of the aforementioned applications are hereby incorporated by reference.
The claims are not limited to the embodiments described herein.