公开(公告)号：WO1998006092A1

公开(公告)日：1998-02-12

申请号：PCT/US1997013610

申请日：1997-08-04

Applicant: QUANTUM CORPORATION

Inventor： QUANTUM CORPORATION ,  RIENER, Timothy, A. ,  LOW, James, M. ,  JACOBY, Jon, E. ,  HATCH, Michael, R. ,  WILLIAMS, Stephen, P.

IPC: G11B05/58

CPC classification number: G11B33/10 ,  G11B5/4813 ,  G11B5/4833 ,  G11B5/4886 ,  G11B5/58

Abstract: A method corrects track misregistraton attributable to out of plane motions of a rotating disk (10) in a hard disk drive (13), and includes the steps of measuring a base plate roll-bias angle between the rotating data storage disk and the head arm (15) with a precision measuring device, and connecting the head arm and load beam (17) at a roll-bias angle selected to minimize track misregistration attributable to the roll-bias. A number of connection arrangements and structures are presented in order to achieve the desired reduction in track misregistration.

Abstract translation: 一种方法校正归因于硬盘驱动器（13）中的旋转盘（10）的平面外运动的跟踪误排列，并且包括以下步骤：测量旋转数据存储盘和头臂之间的基板卷偏置角 （15）与精密测量装置连接，并以所选择的倾斜角度将头臂和负载梁（17）连接起来，以最小化归因于滚动偏压的轨迹重合。 呈现了许多连接布置和结构，以便实现轨道重合失调的期望减少。

公开(公告)号：WO1996005594A1

公开(公告)日：1996-02-22

申请号：PCT/US1995009732

申请日：1995-07-20

Applicant: QUANTUM CORPORATION

Inventor： QUANTUM CORPORATION ,  HATCH, Michael, R. ,  CASTAGNA, Joseph, T. ,  HAN, Chee, Kwong

IPC: G11B05/58

CPC classification number: G11B5/4846 ,  G11B5/5582 ,  G11B5/59694

Abstract: A method and apparatus for sensing vibration in a flex circuit (106) located between a rotary actuator (100) and electronics within a disk drive. Specifically, the apparatus contains a strain gauge (302/408) attached to or embedded within the flex circuit (300/400). The resistivity of the strain gauge varies in response to vibrations on the cable. This resistance variation can be transformed into electrical signals that are used by a servo system to move the actuator assembly in compensatory motion that effectively cancels any off-track motion cuased by the vibrations.

Abstract translation: 一种用于感测位于旋转致动器（100）和盘驱动器内的电子器件之间的柔性电路（106）中的振动的方法和装置。 具体地，该装置包含连接到或嵌入柔性电路（300/400）内的应变仪（302/408）。 应变计的电阻率随电缆上的振动而变化。 该电阻变化可以转换成电信号，伺服系统使用的电信号可以用补偿运动来移动致动器组件，从而有效地消除由振动引起的任何偏离轨道运动。

公开(公告)号：WO1985005719A1

公开(公告)日：1985-12-19

申请号：PCT/US1984001937

申请日：1984-11-26

Applicant: DMA SYSTEMS CORPORATION

Inventor： DMA SYSTEMS CORPORATION ,  SUTTON, David, A.

IPC: G11B05/58

CPC classification number: G11B21/106 ,  G11B5/012 ,  G11B20/1217 ,  G11B27/30 ,  G11B2220/20

Abstract: In the field of data storage/retrieval on rotating recording disks typically the data format is concentric tracks. Data recovery by reading/following such a recorded track encounters a problem when the tracks appear to be eccentric-exhibiting runout- which can lead to reading errors. To enable accurate reading of eccentric tracks a reference pattern (10) is recorded on a track of the disk which provides servo information to control the positioning of the playback transducer as a function of the rotational position of the disk. A physical index (12) is associated with disk rotation. The reference pattern is referenced to the physical index and comprises an integer number of groups each comprised of: blank space (14), AGC burst (16), A and B offset bursts (20, 22). Clock tracks are not necessary.

Abstract translation: 在旋转记录盘上的数据存储/检索领域，通常数据格式是同心轨迹。 通过阅读/跟踪这种记录的轨道的数据恢复在轨迹看起来是偏心的 - 显示跳动时遇到问题，这可能导致读取错误。 为了能够准确地读取偏心轨道，将参考图案（10）记录在盘的轨道上，该轨迹提供伺服信息以根据盘的旋转位置来控制回放换能器的定位。 物理索引（12）与磁盘旋转相关联。 参考模式参考物理索引并且包括整数个组，每组包括：空格（14），AGC突发（16），A和B偏移突发（20,22）。 时钟轨道不是必需的。

公开(公告)号：WO1982001097A1

公开(公告)日：1982-04-01

申请号：PCT/GB1981000180

申请日：1981-09-07

Applicant: BURROUGHS CORP ,  RUXTON D ,  CHALMERS B

Inventor： BURROUGHS CORP

IPC: G11B05/58

CPC classification number: G11B5/59677

Abstract: A head positioning servomechanism positions a read/write head (16) over a rotary, magnetic, informational data storage disc (10). It uses as its positional feed back element a two-phase optical detente (22, 24). It overcomes the positioning errors caused by phase errors between the two position-indicating signals by having the repetition distance of the two signals from the detente (22, 24) equal to the regular spacing between data tracks on the disc (10). One of the tracks is a servo track (14). A selector (25) exclusively provides for positioning the head (16) that position feed back signal of the two available, which brings the head (16) over the servo-track (14) with least error. The positioning is achieved applying correction for the error via a D/A converter (30). The situation is checked from time to time by a controller (34).

Abstract translation: 头部定位伺服机构将读/写头（16）定位在旋转磁性信息数据存储盘（10）上。 它作为其位置反馈元件使用两相光学偏移器（22,24）。 它通过使来自定位器（22,24）的两个信号的重复距离等于盘（10）上的数据轨道之间的规则间距来克服由两个位置指示信号之间的相位误差引起的定位误差。 轨道之一是伺服轨道（14）。 选择器（25）专门提供用于定位头部（16），其中两个可用的位置反馈信号，这使得头部（16）以最小误差带动伺服轨道（14）。 实现通过D / A转换器（30）对误差进行校正的定位。 由控制器（34）不时检查情况。

公开(公告)号：WO1991010230A1

公开(公告)日：1991-07-11

申请号：PCT/US1990000073

申请日：1990-01-04

Applicant: EASTMAN KODAK COMPANY

Inventor： EASTMAN KODAK COMPANY ,  CULLUM, Dennis, Frederick

IPC: G11B05/58

CPC classification number: G11B17/32 ,  G06K7/084 ,  G11B5/10 ,  G11B5/265

Abstract: A dual gap head assembly for writing and reading a high coercivity magnetic card comprises a structure having three projecting pads (12, 14, 16) arranged in a tripod configuration for contacting the rigid magnetic surface of the card. The pads (12, 14, 16) are of equal heights, and the bottom flat surfaces (18, 20, 22) of the pads (12, 14, 16) for containing the card are coplanar. The leading and trailing edges of the pads (12, 14, 16) are tapered (30, 32, 34, 36, 38, 40) in the direction of relative head/card motion to preclude gouging of the magnetic surface as the head traverses the card. A read (50) and a write (42) head are located in one of the pads (12), and the read (26) and write (24) gaps are in the pad (12) surface (18) in contact with the magnetic card. The pad bottom surfaces (18, 20, 22) are of minimal area ensuring three point stable and intimate contact between the head assembly gaps (24, 26) and the high coercivity medium.

Abstract translation: 用于写入和读取高矫顽力磁卡的双间隙头组件包括具有布置成三脚架配置中的三个突出垫（12,14,16）的结构，用于接触卡的刚性磁性表面。 焊盘（12,14,16）具有相同的高度，并且用于容纳卡的焊盘（12,14,16）的底部平坦表面（18,20,22）是共面的。 焊盘（12,14,16）的前缘和后缘在相对头/卡运动的方向上呈锥形（30,32,34,36,38,40），以防止当磁头横穿时磁性表面的气刨 卡片。 读取（50）和写入（42）头位于焊盘（12）中的一个中，并且读取（26）和写入（24）间隙位于与焊盘（12）表面（18）接触的位置 磁卡。 垫底表面（18,20,22）具有确保头部组件间隙（24,26）和高矫顽力介质之间的三点稳定和紧密接触的最小面积。

公开(公告)号：WO1989009467A1

公开(公告)日：1989-10-05

申请号：PCT/US1989001053

申请日：1989-03-14

Applicant: CARLISLE

Inventor： CARLISLE ,  EGGEBEEN, James, A.

IPC: G11B05/58

CPC classification number: G11B5/584 ,  G11B5/488 ,  G11B5/58 ,  G11B20/225

Abstract: A magnetic recording system using a dual layer magnetic medium with the servo tracks (30, 32) in the servo layer (26) being recorded at a first azimuth and the data tracks (38) in the data layer (28) being recorded at a different azimuth than the servo tracks (30, 32) to avoid interference between the servo and data information. The servo tracks (30, 32) are recorded with one of two frequencies, with adjacent servo tracks (30, 32) having different frequencies. The servo tracks (30, 32) are read by a first transducer (46) having the same azimuth as the servo tracks (30, 32) to generate a positioning error to control transducer position. The servo information is also used to control synchronization during reading and writing by the data transducer (48).

公开(公告)号：WO1988001423A2

公开(公告)日：1988-02-25

申请号：PCT/US1987002012

申请日：1987-08-17

Applicant: POLAROID CORPORATION

Inventor： POLAROID CORPORATION ,  FORD, Vernon, E. ,  JONES, Jeremy, K. ,  MADER, John, J. ,  PLUMMER, William, T.

IPC: G11B05/58

CPC classification number: G11B5/59677 ,  G11B5/82

Abstract: Magnetic recording media (20A), and magnetic recording systems using such media, which incorporate a light-transmitting optical grating (22A) at least substantially coextensive with the magnetic recording area (16, 16A). A second light-transmitting optical grating (322) is associated with the magnetic transducer or read/write head (302A, 302B). A moire pattern is produced by light transmitted through both optical gratings, and changes in the moire pattern resulting from changes in the alignment of the optical gratings resulting from movement of the read/write head relative to the media are utilized to provide servo information to keep the magnetic transducer aligned with the magnetic track. Higher magnetic recording capacities may be obtained using such media and systems, since none of the magnetic recording area is used for servo information.

Abstract translation: 磁记录介质（20A）以及使用这种介质的磁记录系统包括一个光学透射光栅（22A），其光学透射光栅（22A）的延伸至少对应于磁记录区 16,16A）。 第二光学光传输网络（322）与磁换能器或读/写头（302A，302B）相关联。 通过透过两个光栅的光产生莫尔图案，并且由于读/写头相对于介质的移动而导致的光栅的对准改变导致的莫尔图案的改变被用于产生 伺服信息用于保持磁换能器与磁轨对齐。 使用这样的系统和介质可以实现更高的磁记录能力，因为没有磁记录区域用于伺服信息目的。

公开(公告)号：WO1986007179A1

公开(公告)日：1986-12-04

申请号：PCT/US1986001024

申请日：1986-05-15

Applicant: EASTMAN KODAK COMPANY

Inventor： EASTMAN KODAK COMPANY ,  JEFFERS, Frederick, John

IPC: G11B05/58

CPC classification number: G11B5/39 ,  G11B5/02 ,  G11B5/58 ,  G11B5/59683

Abstract: To avoid ambiguity in the tracking of a magnetic head (10) to a data track (20), the invention calls for the selection of a single given signal polarity, as recorded, as the source of positional control for a tracking servo (22). Difference and sum signals associated with the two longitudinal halves of a data track constitute, respectively, the servo error signal and the data signal.

公开(公告)号：EP0129298A3

公开(公告)日：1987-07-29

申请号：EP84200867

申请日：1984-06-15

Applicant: N.V. Philips' Gloeilampenfabrieken

Inventor： Weissensteiner, Walter

IPC: G11B05/58 ,  G11B05/02

CPC classification number: G11B5/5922

公开(公告)号：EP0102043A3

公开(公告)日：1986-11-26

申请号：EP83108222

申请日：1983-08-19

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Oda, Yasuyuki ,  Iwase, Kazuhiko

IPC: G11B05/58 ,  G11B21/10

CPC classification number: G11B5/5547 ,  G11B5/54

Abstract: A magnetic head driving unit according to the present invention includes a microprocessor (4). The microprocessor (4) determines whether a first seek operation for positioning the head on an initial position of a cylinder is completed. If the first seek is not completed, analog switch (21) is triggered ON by a control signal from the microprocessor (4). Upon the ON operation of the analog switch (21), the limiter (22) restrains a driving current for a motor (2) in a predetermined value, thereby preventing overrun of the motor (2).