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1. 发明授权

US08681449B1 Calibrating servos 有权
标题翻译：校准伺服
公开(公告)号：US08681449B1
公开(公告)日：2014-03-25
申请号：US13474584
申请日：2012-05-17
申请人： Jason Adler , David Rutherford , Man Cheung , Perry Neos , Luan Ton-That
发明人： Jason Adler , David Rutherford , Man Cheung , Perry Neos , Luan Ton-That
IPC分类号： G11B21/02 , G11B5/596 , G11B5/09
CPC分类号： G11B5/59633 , G11B5/59661 , G11B5/59666 , G11B2020/1281 , G11B2220/2516
摘要： Methods, systems, and apparatus, including computer program products, are described for calibrating servos, and in some implementations for calibrating spiral servos for use in self servo write processes. In one aspect, a method is provided that includes measuring a slope of a spiral written to a machine readable medium, and adjusting a parameter in accordance with the measured slope to calibrate spacing of servo tracks, with respect to variation between a target slope and the measured slope for the spiral, for writing the servo tracks to the machine readable medium using the spiral as a reference and the adjusted parameter to generate a same radial spacing between servo tracks from spirals with different slopes.
摘要翻译：描述了包括计算机程序产品在内的方法，系统和装置，用于校准伺服系统，并且在一些实施例中用于校准用于自伺服写入过程的螺旋伺服。在一个方面，提供了一种方法，其包括测量写入机器可读介质的螺旋线的斜率，并且根据所测量的斜率调整参数以校准伺服轨道的间距，相对于目标斜率和用于螺旋的测量斜率，用于使用螺旋作为参考将伺服轨迹写入机器可读介质，并且调整的参数在具有不同斜率的螺旋之间产生在伺服轨道之间相同的径向间隔。

2. 发明授权

US07773335B1 Calibrating servos 有权
标题翻译：校准伺服
公开(公告)号：US07773335B1
公开(公告)日：2010-08-10
申请号：US12192981
申请日：2008-08-15
申请人： Jason Adler , David Rutherford , Man Cheung , Perry Neos , Luan Ton-That
发明人： Jason Adler , David Rutherford , Man Cheung , Perry Neos , Luan Ton-That
IPC分类号： G11B21/02 , G11B5/596 , G11B5/09
CPC分类号： G11B5/59633 , G11B5/59661 , G11B5/59666 , G11B2020/1281 , G11B2220/2516
摘要： Methods, systems, and apparatus, including computer program products, are described for calibrating servos, and in some implementations for calibrating spiral servos for use in self-servo-write processes. In one aspect, a method is provided that includes determining a measured slope of a spiral, and calibrating radial spacing between servo tracks using the measured slope and a target slope.
摘要翻译：描述了包括计算机程序产品在内的方法，系统和装置，用于校准伺服系统，并且在一些实施例中用于校准用于自伺服写入过程的螺旋伺服。在一个方面，提供了一种方法，其包括确定螺旋的测量斜率，以及使用所测量的斜率和目标斜率校准伺服轨道之间的径向间距。

3. 发明授权

US08194343B1 Calibrating servos 有权
标题翻译：校准伺服
公开(公告)号：US08194343B1
公开(公告)日：2012-06-05
申请号：US12838016
申请日：2010-07-16
申请人： Jason Adler , David Rutherford , Man Cheung , Perry Neos , Luan Ton-That
发明人： Jason Adler , David Rutherford , Man Cheung , Perry Neos , Luan Ton-That
IPC分类号： G11B21/02 , G11B5/596 , G11B5/09
CPC分类号： G11B5/59633 , G11B5/59661 , G11B5/59666 , G11B2020/1281 , G11B2220/2516
摘要： Systems, methods, and apparatuses, including computer program products, are described for, in at least one implementation, determining a measured slope of a spiral, calibrating radial spacing between servo tracks according to a relationship between a target slope and the measured slope, wherein an amount of calibration for the radial spacing varies directly with the relationship between the target slope and the measured slope, and generating servo tracks according to the calibrated radial spacing.
摘要翻译：在至少一个实施方案中，描述了包括计算机程序产品的系统，方法和装置，其根据目标斜率和测量的斜率之间的关系确定螺旋的测量斜率，校准伺服轨道之间的径向间距，其中用于径向间隔的校准量随目标斜率和测量斜率之间的关系直接变化，并根据校准的径向间距产生伺服轨迹。

4. 发明授权

US07869158B1 Helicoid group switching 有权
标题翻译：螺旋组切换
公开(公告)号：US07869158B1
公开(公告)日：2011-01-11
申请号：US12192931
申请日：2008-08-15
申请人： Man Cheung , Perry Neos , David Rutherford
发明人： Man Cheung , Perry Neos , David Rutherford
IPC分类号： G11B5/596 , G11B21/02 , G11B15/12 , G11B5/09
CPC分类号： G11B5/59633 , G11B5/59661 , G11B5/59666
摘要： A recording medium can include multiple helicoid patterns arranged in multiple helicoid groups, e.g., first and second helicoid groups. Operating a disk drive can include switching between helicoid groups to maintain the alignment of the head with respect to a target track of the rotating recording medium. Enabling a switch can include receiving a waveform produced by a head operated with respect to a rotating recording medium, generating first information from one or more portions of the waveform corresponding to the helicoid patterns of the first helicoid group; generating second information from one or more portions of the waveform corresponding to the helicoid patterns of the second helicoid group; and analyzing the second information with respect to the first information to generate calibration information. The calibration information can compensate for operational differences between using the helicoid patterns of the first helicoid group and the helicoid patterns of the second helicoid group.
摘要翻译：记录介质可以包括布置在多个螺旋组中的多个螺旋图案，例如第一和第二螺旋组。操作磁盘驱动器可以包括在螺旋形组之间切换，以保持磁头相对于旋转记录介质的目标磁道的对准。启用开关可以包括接收由相对于旋转记录介质操作的磁头产生的波形，从对应于第一螺旋组的螺旋图案的波形的一个或多个部分产生第一信息; 从对应于第二螺旋组的螺旋图案的波形的一个或多个部分产生第二信息; 以及分析关于所述第一信息的所述第二信息以生成校准信息。校准信息可以补偿使用第一螺旋组的螺旋形图案和第二螺旋组的螺旋形图案之间的操作差异。

5. 发明授权

US08023216B1 Calibrating servos 有权
标题翻译：校准伺服
公开(公告)号：US08023216B1
公开(公告)日：2011-09-20
申请号：US12192984
申请日：2008-08-15
申请人： Man Cheung , David Rutherford , Jerry Richgels , Perry Neos
发明人： Man Cheung , David Rutherford , Jerry Richgels , Perry Neos
IPC分类号： G11B5/09
CPC分类号： G11B5/59633 , G11B5/59661 , G11B5/59666
摘要： Methods, systems, and apparatus, including computer program products are described for calibrating servos, and in some implementations, calibrating spiral servos for use in self-servo-write SSW processes. In one aspect, a method is provide that includes rotating a machine readable medium, and detecting a spiral on the machine readable medium. Detecting a spiral on the machine readable medium includes detecting magnitudes of the spiral and a timing mark, storing a timestamp from a clock signal that corresponds to the timing mark of the spiral, determining a peak of the spiral from the magnitudes, and locking the clock signal to the peak of the spiral using the timestamp.
摘要翻译：描述了包括计算机程序产品在内的方法，系统和装置，用于校准伺服系统，并且在一些实施方式中，校准用于自伺服写入SSW过程的螺旋伺服。在一个方面，提供了一种方法，其包括旋转机器可读介质，以及检测机器可读介质上的螺旋。在机器可读介质上检测螺旋包括检测螺旋的大小和定时标记，从对应于螺旋的定时标记的时钟信号存储时间戳，从该幅度确定螺旋的峰值，并锁定时钟使用时间戳信号到螺旋峰值。

6. 发明授权

US08422158B1 Calibrating servos 有权
标题翻译：校准伺服
公开(公告)号：US08422158B1
公开(公告)日：2013-04-16
申请号：US13474054
申请日：2012-05-17
申请人： Man Cheung , David Rutherford , Jerry Richgels , Perry Neos
发明人： Man Cheung , David Rutherford , Jerry Richgels , Perry Neos
IPC分类号： G11B5/09
CPC分类号： G11B5/59633 , G11B5/59661 , G11B5/59666
摘要： Apparatus, methods, and systems can be employed for calibrating servos, and in some implementations, spiral servos are calibrated for use in self-servo-write (SSW) processes. In an aspect, an apparatus includes a timing reference detector configured to determine timing reference information from a back electromotive force signal associated with a rotating machine readable medium, and a servo track window period generator configured to determine a relative location of a spiral on the rotating machine readable medium based on the timing reference information.
摘要翻译：可以使用装置，方法和系统来校准伺服，并且在一些实施方式中，螺旋伺服器被校准以用于自伺服写入（SSW）过程。一方面，一种装置包括定时参考检测器，其被配置为从与旋转的机器可读介质相关联的反电动势信号中确定定时参考信息，以及伺服轨道窗口周期发生器，被配置为确定旋转的旋转的螺旋的相对位置基于定时参考信息的机器可读介质。

7. 发明授权

US08184392B1 Calibrating servos 有权
标题翻译：校准伺服
公开(公告)号：US08184392B1
公开(公告)日：2012-05-22
申请号：US13290448
申请日：2011-11-07
申请人： Man Cheung , David Rutherford , Jerry Richgels , Perry Neos
发明人： Man Cheung , David Rutherford , Jerry Richgels , Perry Neos
IPC分类号： G11B5/09
CPC分类号： G11B5/59633 , G11B5/59661 , G11B5/59666
摘要： Methods, systems, and apparatus, including computer program products are described for calibrating servos, and in some implementations, calibrating spiral servos for use in self-servo-write (SSW) processes. In one aspect, a method is provided that includes determining timing reference information on a machine readable medium, locking a clock signal to the timing reference information, detecting a spiral on the machine readable medium, determining a location of the spiral using the clock signal, and calibrating a spiral servo according to the location of the spiral.
摘要翻译：描述了用于校准伺服系统的方法，系统和装置，包括计算机程序产品，并且在一些实施方式中，校准用于自伺服写入（SSW）过程的螺旋伺服。一方面，提供了一种方法，其包括确定机器可读介质上的定时参考信息，将时钟信号锁定到定时参考信息，检测机器可读介质上的螺旋，使用时钟信号确定螺旋的位置，并根据螺旋的位置校准螺旋伺服。

8. 发明授权

US08085492B1 Helicoid group switching 有权
标题翻译：螺旋组切换
公开(公告)号：US08085492B1
公开(公告)日：2011-12-27
申请号：US12972798
申请日：2010-12-20
申请人： Man Cheung , Perry Neos , David Rutherford
发明人： Man Cheung , Perry Neos , David Rutherford
IPC分类号： G11B5/596 , G11B5/09 , G11B15/12 , G11B21/02
CPC分类号： G11B5/59633 , G11B5/59661 , G11B5/59666
摘要： The present disclosure includes systems and techniques relating to magnetic recording devices, such as disk drives. A recording medium of a magnetic recording device can include multiple helicoid patterns arranged in multiple helicoid groups. A described technique includes receiving a waveform produced by a head operated with respect to the medium; determining, based on the waveform, first phase difference(s) corresponding to a first helicoid group; affecting an alignment of the head with respect to the medium based on the first helicoid group by compensating for the first phase difference(s) to maintain the alignment; determining, while compensating for the first phase differences, second phase difference(s) corresponding to a second helicoid group; and affecting, responsive to a switch from the first helicoid group to the second helicoid group, the alignment of the head with respect to the medium by compensating for the second phase difference(s) to maintain the alignment.
摘要翻译：本公开包括与诸如磁盘驱动器之类的磁记录装置有关的系统和技术。磁记录装置的记录介质可以包括以多个螺旋组排列的多个螺旋图案。所描述的技术包括接收由相对于介质操作的头部产生的波形; 基于所述波形确定对应于第一螺旋组的第一相位差; 通过补偿第一相位差来维持对准，影响头部相对于基于第一螺旋组的介质的对准; 在补偿所述第一相位差的同时，确定对应于第二螺旋组的第二相位差; 并且响应于从第一螺旋组到第二螺旋组的切换，通过补偿第二相位差以维持对准来影响磁头相对于介质的对准。

9. 发明授权

US08068304B1 Calibrating servos 有权
标题翻译：校准伺服
公开(公告)号：US08068304B1
公开(公告)日：2011-11-29
申请号：US12192977
申请日：2008-08-15
申请人： Man Cheung , David Rutherford , Jerry Richgels , Perry Neos
发明人： Man Cheung , David Rutherford , Jerry Richgels , Perry Neos
IPC分类号： G11B5/09
CPC分类号： G11B5/59633 , G11B5/59661 , G11B5/59666
摘要： Methods, systems, and apparatus, including computer program products are described for calibrating servos, and in some implementations, calibrating spiral servos for use in self-servo-write (SSW) processes. In one aspect, a method is provided that includes determining timing reference information on a machine readable medium, locking a clock signal to the timing reference information, detecting a spiral on the machine readable medium, determining a location of the spiral using the clock signal, and calibrating a spiral servo according to the location of the spiral.
摘要翻译：描述了用于校准伺服系统的方法，系统和装置，包括计算机程序产品，并且在一些实现中，校准用于自伺服写入（SSW）过程的螺旋伺服。一方面，提供了一种方法，其包括确定机器可读介质上的定时参考信息，将时钟信号锁定到定时参考信息，检测机器可读介质上的螺旋，使用时钟信号确定螺旋的位置，并根据螺旋的位置校准螺旋伺服。

10. 发明申请

US20070206319A1 Method for measuring actuator velocity during self-servo-write 有权
标题翻译：在自伺服写入期间测量执行器速度的方法
公开(公告)号：US20070206319A1
公开(公告)日：2007-09-06
申请号：US11544253
申请日：2006-10-09
申请人： David Rutherford , Luan Ton-That
发明人： David Rutherford , Luan Ton-That
IPC分类号： G11B5/596
CPC分类号： G11B5/59633 , G11B5/59661 , G11B5/59666
摘要： A system comprises a positioning module, a frequency measuring module, a simulation module, and a control module. The positioning module positions an actuator arm adjacent to a track to read spirals that are prewritten using current of a predetermined frequency. The frequency measuring module measures a first frequency of sync marks of the spirals when the actuator arm is positioned adjacent to the track. The simulation module calculates a second frequency of the sync marks when the actuator arm moves at a predetermined actuator velocity. The control module calculates an actuator velocity at which the spirals are prewritten based on the first frequency, the second frequency, and the predetermined actuator velocity.
摘要翻译：系统包括定位模块，频率测量模块，模拟模块和控制模块。定位模块将致动器臂定位成与轨道相邻，以读取使用预定频率的电流预写的螺旋。当致动器臂位于轨道附近时，频率测量模块测量螺旋的同步标记的第一频率。当致动器臂以预定的致动器速度移动时，模拟模块计算同步标记的第二频率。控制模块基于第一频率，第二频率和预定的致动器速度来计算螺旋预先写入的致动器速度。

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