DE3369223D1 - Automatic reference adjustment for position error signal on disk file servo system - Google Patents

Automatic reference adjustment for position error signal on disk file servo system

Info

Publication number
DE3369223D1
DE3369223D1 DE8383110301T DE3369223T DE3369223D1 DE 3369223 D1 DE3369223 D1 DE 3369223D1 DE 8383110301 T DE8383110301 T DE 8383110301T DE 3369223 T DE3369223 T DE 3369223T DE 3369223 D1 DE3369223 D1 DE 3369223D1
Authority
DE
Germany
Prior art keywords
error signal
position error
servo system
disk file
reference adjustment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE8383110301T
Other languages
English (en)
Inventor
Howard John Roalson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Application granted granted Critical
Publication of DE3369223D1 publication Critical patent/DE3369223D1/de
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/54Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
    • G11B5/55Track change, selection or acquisition by displacement of the head
    • G11B5/5521Track change, selection or acquisition by displacement of the head across disk tracks
    • G11B5/5526Control therefor; circuits, track configurations or relative disposition of servo-information transducers and servo-information tracks for control thereof
    • G11B5/553Details
    • G11B5/5547"Seek" control and circuits therefor
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/596Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
    • G11B5/59605Circuits
    • G11B5/59622Gain control; Filters
DE8383110301T 1982-12-20 1983-10-17 Automatic reference adjustment for position error signal on disk file servo system Expired DE3369223D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/451,583 US4551776A (en) 1982-12-20 1982-12-20 Automatic reference adjustment for position error signal on disk file servo system

Publications (1)

Publication Number Publication Date
DE3369223D1 true DE3369223D1 (en) 1987-02-19

Family

ID=23792814

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8383110301T Expired DE3369223D1 (en) 1982-12-20 1983-10-17 Automatic reference adjustment for position error signal on disk file servo system

Country Status (4)

Country Link
US (1) US4551776A (de)
EP (1) EP0111665B1 (de)
JP (1) JPS59117758A (de)
DE (1) DE3369223D1 (de)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4633345A (en) * 1985-05-24 1986-12-30 International Business Machines Corp. Positioning misaligned disk heads
US4878211A (en) * 1986-05-26 1989-10-31 Pioneer Electronic Corporation Method and apparatus for correcting the loop gain of a servo loop in accordance with measurements during open-loop operation
US4688118A (en) * 1986-07-01 1987-08-18 Hewlett-Packard Company Servo gain compensation in a disc drive
US4823212A (en) * 1986-11-26 1989-04-18 Hewlett-Packard Company Sampled servo code format and system for a disc drive
JP2612262B2 (ja) * 1986-12-16 1997-05-21 富士通株式会社 磁気デイスク装置
US5241431A (en) * 1987-03-03 1993-08-31 Unisys Corporation Apparatus for adjustment of position slope for servo
US4989103A (en) * 1987-03-03 1991-01-29 Unisys Corp. Adjustment of position slope for disk drive servo using half-track point
US4797756A (en) * 1987-03-05 1989-01-10 Unisys Corp. Method for positioning head in disk drive deriving "position" offset from "quadrature" signals
US5034746A (en) * 1988-09-21 1991-07-23 International Business Machines Corporation Analog-to-digital converter for computer disk file servo position error signal
US5189571A (en) * 1990-04-30 1993-02-23 Seagate Technology, Inc. Adaptive settle time minimization for a hard disk drive
US5329409A (en) * 1991-07-24 1994-07-12 Seagate Technology, Inc. Correction of current feedback offset for disc drive servo systems
JP2608220B2 (ja) * 1992-01-31 1997-05-07 富士通株式会社 磁気ディスク装置のポジション感度調整方法
US5299075A (en) * 1992-06-04 1994-03-29 Hewlett-Packard Company Apparatus and method for shock attenuation in a disk recording and/or reproduction system using variable gain acceleration sensor
US5691617A (en) * 1993-07-12 1997-11-25 Seagate Technology, Inc. Disc drive transducer deadbeat settle method utilizing interval correction
US5602692A (en) * 1994-10-07 1997-02-11 International Business Machines Corporation Sampled position error signal demodulation system for banded data disk drives
US5717538A (en) * 1995-01-20 1998-02-10 International Business Machines Corporation Asynchronous position error signal detector employing weighted accumulation for use in servo system
JP3292621B2 (ja) * 1995-04-20 2002-06-17 富士通株式会社 ディスク装置のポジション感度調整装置及び方法
JPH09128916A (ja) 1995-10-31 1997-05-16 Fujitsu Ltd ディスク装置
US6067204A (en) * 1996-06-03 2000-05-23 Seagate Technology, Inc. Disc drive servo pattern insensitive to read head
US5774299A (en) * 1996-08-13 1998-06-30 Seagate Technology, Inc. Adaptive calibration of read/write elements in a disc drive
US6078445A (en) * 1997-08-07 2000-06-20 International Business Machines Corporation Gain control for a dual burst, dual frequency PES servo pattern
WO1999031956A2 (en) * 1997-12-19 1999-07-01 Lsi Logic Corporation Automated servo gain adjustment using fourier transform

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3818502A (en) * 1972-09-05 1974-06-18 Ibm Automatic head width correction
US3881184A (en) * 1974-05-28 1975-04-29 Ibm Adaptive digital servo system
US4032984A (en) * 1975-04-28 1977-06-28 Burroughs Corporation Transducer positioning system for providing both coarse and fine positioning
GB1520350A (en) * 1976-12-22 1978-08-09 Ibm Data storage apparatus
US4157577A (en) * 1977-11-14 1979-06-05 International Business Machines Corporation Rotatable storage apparatus with digitally responsive circuitry for track selection
US4257074A (en) * 1979-06-15 1981-03-17 Magnetic Peripherals Inc. Time optimal function generator for disk file magnetic recording head servo position control loop
US4415939A (en) * 1981-04-27 1983-11-15 Iomega Corporation Head positioning servo for disk drive
US4400747A (en) * 1981-06-26 1983-08-23 International Business Machines Corporation Servo system for data storage apparatus
US4451859A (en) * 1982-04-02 1984-05-29 Ampex Corporation Magnetic video head position control
US4480217A (en) * 1982-12-14 1984-10-30 Storage Technology Corporation Automatic velocity calibrator for a velocity servo loop in a magnetic disk drive

Also Published As

Publication number Publication date
EP0111665B1 (de) 1987-01-14
JPS59117758A (ja) 1984-07-07
JPH0150031B2 (de) 1989-10-26
EP0111665A1 (de) 1984-06-27
US4551776A (en) 1985-11-05

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee