FR2373819B1 - - Google Patents

Info

Publication number
FR2373819B1
FR2373819B1 FR7734787A FR7734787A FR2373819B1 FR 2373819 B1 FR2373819 B1 FR 2373819B1 FR 7734787 A FR7734787 A FR 7734787A FR 7734787 A FR7734787 A FR 7734787A FR 2373819 B1 FR2373819 B1 FR 2373819B1
Authority
FR
France
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
FR7734787A
Other languages
French (fr)
Other versions
FR2373819A1 (fr
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.)
Unisys Corp
Original Assignee
Burroughs 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
Priority claimed from GB51340/76A external-priority patent/GB1516239A/en
Application filed by Burroughs Corp filed Critical Burroughs Corp
Publication of FR2373819A1 publication Critical patent/FR2373819A1/fr
Application granted granted Critical
Publication of FR2373819B1 publication Critical patent/FR2373819B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/19—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path
    • G05B19/40—Open loop systems, e.g. using stepping motor
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition 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
    • G11B5/54—Disposition 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
    • G11B5/55—Track change, selection or acquisition by displacement of the head
    • G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
    • G11B5/5565—Track change, selection or acquisition by displacement of the head across disk tracks system adaptation for compensation of variations of physical parameters, e.g. temperature

Landscapes

  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Position Or Direction (AREA)
FR7734787A 1976-12-09 1977-11-18 Installation et procede de positionnement notamment pour tetes de lecture de disque Granted FR2373819A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB51340/76A GB1516239A (en) 1976-12-09 1976-12-09 Positioning system and method particularly useful for magnetic disc drives
US05/810,447 US4122503A (en) 1976-12-09 1977-06-27 Positioning system and method particularly useful for magnetic disk drives

Publications (2)

Publication Number Publication Date
FR2373819A1 FR2373819A1 (fr) 1978-07-07
FR2373819B1 true FR2373819B1 (da) 1981-06-19

Family

ID=26266844

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7734787A Granted FR2373819A1 (fr) 1976-12-09 1977-11-18 Installation et procede de positionnement notamment pour tetes de lecture de disque

Country Status (1)

Country Link
FR (1) FR2373819A1 (da)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2459507A1 (fr) * 1979-06-15 1981-01-09 Rech Const Electro Et Machine de positionnement de precision a courroie crantee avec compensation de l'erreur sur le pas de crantage
US4462053A (en) * 1981-07-02 1984-07-24 Irwin International, Inc. Method for controlling a disc head
DE3142152C2 (de) * 1981-10-23 1984-05-24 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zum automatischen Abgleich der Kennlinie einer Ablenkeinheit
US4620244A (en) * 1985-11-20 1986-10-28 Seagate Technology Compensation method to correct thermally induced off-track errors in disc drives
JPS62145570A (ja) * 1985-12-19 1987-06-29 Victor Co Of Japan Ltd デイスクドライブ装置
DE3776928D1 (de) * 1986-03-19 1992-04-09 Fujitsu Ltd Regelsystem zum spurzugriff fuer ein magnetplattensystem.
FR2614448B1 (fr) * 1987-04-23 1989-07-13 Logilift Sarl Procede de regulation de la vitesse de rotation d'un moteur electrique, moyens mettant en oeuvre ce procede et moteurs pourvus de ces moyens
JPH0810542B2 (ja) * 1987-06-06 1996-01-31 富士通株式会社 磁気ディスク装置のトラックアクセス制御方式
US4969059A (en) * 1988-03-28 1990-11-06 Rigidyne Corporation Offset nulling system for computer disk drives
EP0574637B1 (fr) * 1992-06-19 1997-04-09 EURO CP s.a.r.l. Procédé pour commander un organe déplaçable d'une unité fonctionnelle, et unité fonctionnelle pour sa mise en oeuvre

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3720930A (en) * 1972-06-05 1973-03-13 Control Data Corp Thermal expansion compensator
US3757189A (en) * 1972-12-29 1973-09-04 Century Data Systems Inc Temperature compensation for positioning system
US3900782A (en) * 1974-07-18 1975-08-19 Basf Ag System for compensating for temperature variations in a magnetic disc drive

Also Published As

Publication number Publication date
FR2373819A1 (fr) 1978-07-07

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Legal Events

Date Code Title Description
CD Change of name or company name
TP Transmission of property
CD Change of name or company name
TP Transmission of property