公开(公告)号：EP0094495A3

公开(公告)日：1986-02-05

申请号：EP83102954

申请日：1983-03-25

Applicant: International Business Machines Corporation

Inventor： Anderson, Todd Barry ,  Glaser, Thomas William ,  Neesz, John Jacob

IPC: G11B05/58 ,  G11B05/55 ,  G11B21/10

CPC classification number: G11B5/5547

Abstract: A sector servo seek control samples each sector to obtain sector time, the track identification within a sequence of track types and a position error signal (PES) for a track location to track location seek. The device during each sector determines the actual transducer track location and the next sector projected track location with respect to the sequence of track types. The projected track location is corrected using the error signal (PES) to find the actual location, but if a sector signal is missing or erroneous, the projected location is used as the actual location, permitting a composite correction to be made when a correct sector signal is obtained. The seek time is minimized by using maximum acceleration followed by maximum deceleration while not exceeding a velocity value that would cause the device to overshoot the target track using full deceleration.

公开(公告)号：EP0125051A3

公开(公告)日：1985-12-18

申请号：EP84302505

申请日：1984-04-12

Applicant: VICTOR COMPANY OF JAPAN, LIMITED

Inventor： Koide, Hajime

IPC: G11B05/008 ,  H04N09/83 ,  G11B05/592 ,  G11B21/10 ,  G11B05/04 ,  G11B05/58 ,  G11B05/52 ,  H04N05/782

CPC classification number: H04N9/802 ,  G11B5/0086 ,  G11B5/5922 ,  G11B21/103 ,  H04N9/8355

Abstract: In a recording apparatus frequency modulators (25-28) a provided for modulating carriers having different frequencies with an information signal. The different frequency irriers are sequentially combined by a switch (12) and aplied to a recording head in response to the head being fifted from one track to the next to record each of the carriers a different track, so that there is a difference in frequency between carriers recorded on adjacent tracks. During play- back, the frequency-modulated carriers are sequentially produced and separated by band-pass filters (25-28) into individual carriers, frequency-demodulated respectively by (29-32) and sequentially combined by a switch 3) to form the original information signal. Tracking control (100) is provided to control the lateral position of the ansducer head in response to the carriers which are derived tracks on opposite sides of the track being scanned.

公开(公告)号：EP0107380A3

公开(公告)日：1985-05-22

申请号：EP83305784

申请日：1983-09-27

Applicant: QUANTUM CORPORATION

Inventor： Moon, William G. ,  Moon, Ronald R. ,  Peterson, Bruce R. ,  Westwood, Donald C.

IPC: G11B21/08 ,  G11B21/10 ,  G11B05/58 ,  G11B05/55

CPC classification number: G11B19/28 ,  G11B5/5521 ,  G11B5/59611 ,  G11B5/59677 ,  G11B21/085

Abstract: A data storage device and method are described. The device includes a base (11), a plurality of rigid magnetic data storage disks (12, 14, 16, 18) commonly journalled to the base, one disk surface being divided into a plurality of radial sectors, each sector being recorded with first bursts offset from track centreline in a first direction for odd numbered tracks and a second direction for even numbered tracks, and with second bursts between the first bursts offset from track centreline in the second direction for odd numbered tracks and centreline in the first direction for even numbered tracks; a plurality of read/write data transducers (42, 44, 46, 48, 50, 52, 54, 56) held in close proximity to the disks; a carriage carrying the transducers; optical encoder means (94, 88, 96) for providing a plurality of phase related signals indicating transducer position relative to the base; peak detection means for detecting and putting out average peak amplitude values for each sector servo burst read by the associated transducer; analogue switch means for switching between the said position signals and peak amplitude values; analogue digital converter means for converting each analogue signal received therefrom into a digital word; user interface circuit means for receiving digital disk surface and track selection control data; tachometer means for generating clock signals representing sector boundaries; programmed digital microprocessor means for receiving digital data from the analogue to digital converter means and the user interface circuit means to calculate control data for commanding the actuator to move from a departure track to a user defined destination track on information from the encoder means during track seeking, and for commanding the actuator to maintain the transducers in track centreline alignment on information from the peak detection means during track following; digital to analogue converter means for receiving and converting the said control data words into analogue signal values; and amplifier means for amplifying the analogue signal values to control the carriage means during track following and during track seeking and settling.

Abstract translation: 描述数据存储装置和方法。 该装置包括基座（11），通常支撑在基座上的多个刚性磁性数据存储盘（12,14,16,18），一个盘表面被分成多个径向扇区，每个扇区首先被记录 突发从奇数编号磁道的第一方向的轨道中心线偏移，偶数轨迹的第二方向偏移，并且在第一脉冲串之间的第二脉冲串在第二方向上从轨道中心线偏移到奇数轨迹，并且在第一方向上的中心线用于偶数 编号轨道 多个读/写数据传感器（42,44,46,48,50,52,54,56）保持在非常靠近磁盘的位置; 承载传感器的托架; 光学编码器装置（94,88,96），用于提供指示相对于基座的换能器位置的多个相位相关信号; 峰值检测装置，用于检测和排除由关联的换能器读取的每个扇区伺服脉冲串的平均峰值振幅值; 用于在所述位置信号和峰值振幅值之间切换的模拟开关装置; 模拟数字转换器装置，用于将从其接收的每个模拟信号转换为数字字; 用于接收数字盘表面和轨道选择控制数据的用户接口电路装置; 用于产生表示扇区边界的时钟信号的转速计装置; 用于从模拟数字转换器装置和用户接口电路装置接收数字数据的编程数字微处理器装置，用于计算控制数据，用于指令致动器在轨迹寻找期间来自编码器装置的信息从出发轨迹移动到用户定义的目标轨迹 并且用于在轨道跟踪期间命令致动器将来自峰值检测装置的信息上的传感器保持在轨道中心线对准中; 数模转换器装置，用于接收和转换所述控制数据字为模拟信号值; 以及放大器装置，用于放大模拟信号值，以在跟踪跟踪期间和跟踪寻找和稳定期间控制滑架装置。

公开(公告)号：EP0101616A3

公开(公告)日：1984-09-05

申请号：EP83108189

申请日：1983-08-19

Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA

Inventor： Hasegawa, Tadashi c/o Mitsubishi Denki K.K. ,  Kobayashi, Yoshiharu c/o Mitsubishi Denki K.K. ,  Iwamoto, Akira c/o Mitsubishi Denki K.K. ,  Tedaka, Yoshihisa c/o Mitsubishi Denki K.K.

IPC: G11B05/54 ,  G11B05/58

CPC classification number: G11B5/58 ,  G11B5/54

Abstract: 0 A magnetic head shifting means for flexible disk memory system wherein kinetic energy of an arm is absorbed by means of a cushioning material interposed between the arm and an abutment of a shackle rod thereby to reduce a transient period of time which is the one until the memory medium and magnetic heads reach their stable state, whilst damage of the memory medium is suppressed in steady state, whereby stable electromagnetic conversion characteristics can be obtained.

公开(公告)号：EP0106533A3

公开(公告)日：1984-08-08

申请号：EP83305349

申请日：1983-09-13

Applicant: APPLIED MAGNETICS MAGNETIC HEAD DIVISION CORPORATION

Inventor： Schuler, Heinz

IPC: G11B05/27 ,  G11B05/58 ,  G11B05/105

CPC classification number: G11B5/58 ,  G11B5/2655

Abstract: A magnetic head assembly having a read and write magnetic transducing assembly (390) with a gap (406) for recording a track of data having a first width on a moving magnetic media (160) and an erase magnetic transducing assembly (392) located adjacent said read and write magnetic transducing assembly (390). The erase magnetic transducing assembly includes a pair of erase cores (394, 396) each having two core portions (412, 414) which each terminate in end sections positioned with one end section of each core portion adjacent each other to define an erase gap (426) and with the other end sections of each core portion terminating in end edges which are spaced from each other to define an opening therebetween. The pair of erase cores (394, 396) are positioned in spaced, substantially parallel relationship to each other with a predetermined distance therebetween which is less than said first width. The erase gaps (426) are located on each side of the recording gap to erase a portion of the edge of each recorded track of data having a first width to produce a recorded track of data on a said magnetic media having a track width substantially equal to said predetermined distance. An erase coil (424) encloses two spaced parallel aligned other end sections of one core portions (414,416) of each erase core (394, 396) with the end edges thereof extending slightly beyond the erase coil (424). A back bar (420) having a first end (430) and a second end (432 is positioned across the opening with said first end (430) contiguous each of said end edges of the two spaced parallel aligned other end sections (414, 416). The second end (432) is contiguous the other two spaced parallel aligned other end sections of the other core portion of each erase core to form a closed low reluctance path.

Abstract translation: 一种具有读写磁转换组件（390）的磁头组件，具有用于在移动磁介质（160）上记录具有第一宽度的数据轨迹的间隙（406）和位于邻近位置的擦除磁转换组件（392） 所述读写磁传感组件（390）。 擦除磁转换组件包括一对擦除芯（394,396），每一个具有两个芯部分（412,414），每个芯部分终止于端部，每个芯部分的一个端部分彼此相邻，以限定擦除间隙 并且每个芯部分的另一端部终止于彼此间隔开的端边缘，以在它们之间形成开口。 一对擦除芯（394,396）以彼此间隔开的大致平行的关系定位，其间的预定距离小于所述第一宽度。 擦除间隙（426）位于记录间隙的每一侧，以擦除具有第一宽度的每个记录的轨道的边缘的一部分，以在所述磁性介质上产生具有轨道宽度基本相等的数据记录轨迹 到所述预定距离。 擦除线圈（424）包围每个擦除芯（394,396）的一个芯部（414,416）的两个间隔开的平行排列的另一端部，其端边缘稍微延伸超过擦除线圈（424）。 具有第一端（430）和第二端（432）的后杆（420）跨越所述开口定位，所述第一端（430）邻接所述两个间隔开的平行对齐的另一端部（414）的每个所述端边缘 ，416）。 第二端（432）与每个擦除芯的另一个芯部分的另外两个间隔开的平行排列的另外的端部相邻，以形成闭合的低磁阻路径。

公开(公告)号：EP0113051A3

公开(公告)日：1986-09-03

申请号：EP83111932

申请日：1983-11-29

Applicant: International Business Machines Corporation

Inventor： Cocke, John ,  DiStefano, Thomas Herman

IPC: G11B05/58 ,  G11B05/55 ,  G11B21/10

CPC classification number: G11B5/59677

Abstract: An information reading/writing head (H) is positioned to follow data tracks (TR) that are formed concentrically on a magnetic recording disk (D). A set of spiral radial position-indicating markings (Pl, P2,..) is formed which can be detected on the disk optically, or capacitively. The position of the head is determined by sensing the spiral markings. The reference for the phase detection is detected by sensing radial indicia (Rl, R2,..) on the disk periphery or spiral markings of servo data with a different pitch and frequency from the position-indicating spiral markings. A servo control system operated by the above disk, reads the radial position-indicating spiral pattern and the reference pattern on the disk and compares the relative phases of the two to compute the track position of the head. A set of phase-locked loops with subsequent phase comparators is used to decode the servo data.

公开(公告)号：EP0104941A3

公开(公告)日：1985-11-06

申请号：EP83305785

申请日：1983-09-27

Applicant: QUANTUM CORPORATION

Inventor： Harrison, Joel N. ,  Condito, Vincent A. ,  Graham, Randolph H. ,  Nixon, Brian J. ,  Simonsen, Richard C.

IPC: G11B21/08 ,  G11B21/10 ,  G11B19/28 ,  G11B05/58 ,  G11B05/55

CPC classification number: G11B19/28 ,  G11B5/5521 ,  G11B5/59677 ,  G11B21/085

Abstract: A data storage device (20) comprises a unitary base casting (21); a plurality of data storage disks (26a, 26b, 26c and 26d), at least one disk having a servo sector prerecorded with two series of alternating servo bursts; a brushless direct current drive motor (24) mounted to the base for rotating the disks; data transducers (63a, 63b, 63c, 63d, 63e, 63f, 63g, and 63h) mounted on a rotary carriage (28); a thermally isolated rotary actuator (40) for moving the carriage means and thereby the transducers; an optical encoder (70) having a housing incorporating a light source (82) and a photodiode array (93) and a scale (100) movable between the source and the array in response to movement of the carriage (28); a peak detector for detecting peak amplitudes of the servo bursts; and programmed digital computer means including an analogue to digital converter for converting the outputs of the photodiode array and peak detector to digital values; processor means for controlling movement of the actuator, via a digital to analogue converter, by counting data track boundaries from the digitised photodiode array signals and track centreline offset values from the digitised servo burst signals to move the transducers between data tracks in accordance with instructions from a user interface and to maintain the transducers in track centreline alignment in accordance with the calculated offset values.

公开(公告)号：EP0098921A3

公开(公告)日：1984-09-26

申请号：EP83102859

申请日：1983-03-22

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Akutsu, Mitsuru

IPC: G11B05/48 ,  G11B05/58 ,  G11B17/32 ,  G11B05/56

CPC classification number: G11B5/4826 ,  G11B5/56 ,  G11B5/58 ,  G11B17/32

Abstract: A magnetic head (20) of a magnetic head device has a head guide (21) which has a groove (23) in its side surface. A support table (33) has a recess (33a) in which the lower portion of the head guide is fitted. Screws (41, 42) are screwed upward from the bottom of the support table and extend into the recess. The head guide is supported on the screws. An elastic plate (31) which has central and radially extending perforations (31a, 31b) at its center portion is mounted on the upper surface of the support table. A portion of the elastic member which defines the central perforation (31a) is fitted in the groove of the head guide. The head guide is then biased toward the screws. When the screws are turned, the level and azimuth of the magnetic head can be adjusted. A pressure pad (50) is also adjusted by other screws (64) to be set at a selected position relative to the magnetic head and at a selected tilt angle with respect to the magnetic head.

公开(公告)号：EP0097768A3

公开(公告)日：1984-02-22

申请号：EP83102550

申请日：1983-03-15

Applicant: International Business Machines Corporation

Inventor： Pennington, Dale Howard

IPC: G11B05/58

CPC classification number: G11B5/59633

Abstract: This invention relates to a system for use in track following servo operations on a magnetic disk where sectors of servo information are interspersed on said disk with data track portions. The servo information and data are read by the same magnetic head. The servo sectors contains alternate first and second servo tracks having magnetic transitions which are spaced from each other in adjacent tracks. The servo tracks are recorded on said disk at a slant with respect to said data tracks. The centerline of each of said servo tracks corresponds to the centerline of one of said data tracks at the beginning of each servo motor and the centerline of each of said slanted servo tracks corresponding to the centerline of a different one of said data tracks at the end of each servo sector. The system includes first detector means (22) for detecting signals read by said head as it passes across said servo sector, and digital means (23, 24) for measuring time relationships between signals from said first and second servo tracks during the rotation of said servo sector past said head to provide a measure of the amount and direction of the displacement of said head from said data track centerline.

公开(公告)号：EP0042931A3

公开(公告)日：1982-05-12

申请号：EP81103167

申请日：1981-04-28

Applicant: International Business Machines Corporation

Inventor： Baxter, Duane Willard ,  Evjen, Joseph Lewis, Jr. ,  Hoveland, William Charles ,  Roble, Roy Arnold ,  Smith, Donald Raymond ,  Wirz, John Henry

IPC: G11B05/58 ,  G11B27/00 ,  G11B21/10

CPC classification number: G11B5/59655

Abstract: A rotating magnetic disk storage assembly (10) using sector servo information on the disks (9), is initialized with servo information by first using the dedicated product transducer heads (14) and accessing mechanism (13), to write on the innermost and outermost data tracks. The data tracks written by each transducer head are read using the heads (16) of a precision servowriter mechanism positioned at the expected data track positions. Errors between expected and actual positions are determined and in turn each servo writer head is positioned to duplicate the path of the product head written innermost and outermost tracks. By offsetting the precision servowriter head by a half track pitch and writing the servo information to form equally spaced tracks, the disk is initialized with full track pitch servo information which is positioned and aligned with the position and alignment of the dedicated product head assembly. This is repeated for each disk and servo writer head.