FR2373819A1 - Installation et procede de positionnement notamment pour tetes de lecture de disque - Google Patents

Installation et procede de positionnement notamment pour tetes de lecture de disque

Info

Publication number
FR2373819A1
FR2373819A1 FR7734787A FR7734787A FR2373819A1 FR 2373819 A1 FR2373819 A1 FR 2373819A1 FR 7734787 A FR7734787 A FR 7734787A FR 7734787 A FR7734787 A FR 7734787A FR 2373819 A1 FR2373819 A1 FR 2373819A1
Authority
FR
France
Prior art keywords
humidity
magnetic disc
positioning system
compensation
positioning
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.)
Granted
Application number
FR7734787A
Other languages
English (en)
French (fr)
Other versions
FR2373819B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html
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 true FR2373819A1 (fr) 1978-07-07
FR2373819B1 FR2373819B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 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 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021968A1 (fr) * 1979-06-15 1981-01-07 Societe D'etudes Recherches Et Constructions Electroniques Sercel Machine de positionnement de précision à courroie crantée avec compensation de l'erreur sur le pas de crantage
EP0069549A1 (en) * 1981-07-02 1983-01-12 Irwin International, Inc. Method of positioning a transducer over a disc
EP0077970B1 (de) * 1981-10-23 1985-04-10 Siemens Aktiengesellschaft Vorrichtung zum automatischen Abgleich der Kennlinie einer Ablenkeinheit
EP0227061A3 (en) * 1985-12-19 1988-10-12 Victor Company Of Japan, Limited Disk drive apparatus providing increased track density
FR2614448A1 (fr) * 1987-04-23 1988-10-28 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
EP0295015A3 (en) * 1987-06-06 1989-05-31 Fujitsu Limited Track access control system for magnetic disk apparatus
EP0238318A3 (en) * 1986-03-19 1989-05-31 Fujitsu Limited Track access control system for magnetic disk system
EP0335546A3 (en) * 1988-03-28 1990-11-22 Seagate Technology International Off-set nulling system and method for computer disk drives
EP0574637A1 (fr) * 1992-06-19 1993-12-22 EURO CP s.a.r.l. Procédé pour commander un organe déplaçable d'une unité fonctionnelle, et unité fonctionnelle pour sa mise en oeuvre
EP0522597A3 (en) * 1985-11-20 1994-07-20 Seagate Technology Methods of monitoring operating temperatures in disc drives to prevent thermal mistracking

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3757189A (en) * 1972-12-29 1973-09-04 Century Data Systems Inc Temperature compensation for positioning system
FR2188228A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1972-06-05 1974-01-18 Control Data Corp
FR2279188A1 (fr) * 1974-07-18 1976-02-13 Basf Ag Procede et dispositif de commande pour la compensation de variations de temperature dans un mecanisme de memoire a disques magnetiques

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2188228A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1972-06-05 1974-01-18 Control Data Corp
US3757189A (en) * 1972-12-29 1973-09-04 Century Data Systems Inc Temperature compensation for positioning system
FR2279188A1 (fr) * 1974-07-18 1976-02-13 Basf Ag Procede et dispositif de commande pour la compensation de variations de temperature dans un mecanisme de memoire a disques magnetiques

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NV700/76 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021968A1 (fr) * 1979-06-15 1981-01-07 Societe D'etudes Recherches Et Constructions Electroniques Sercel Machine de positionnement de précision à courroie crantée avec compensation de l'erreur sur le pas de crantage
EP0069549A1 (en) * 1981-07-02 1983-01-12 Irwin International, Inc. Method of positioning a transducer over a disc
EP0077970B1 (de) * 1981-10-23 1985-04-10 Siemens Aktiengesellschaft Vorrichtung zum automatischen Abgleich der Kennlinie einer Ablenkeinheit
EP0522597A3 (en) * 1985-11-20 1994-07-20 Seagate Technology Methods of monitoring operating temperatures in disc drives to prevent thermal mistracking
EP0227061A3 (en) * 1985-12-19 1988-10-12 Victor Company Of Japan, Limited Disk drive apparatus providing increased track density
EP0238318A3 (en) * 1986-03-19 1989-05-31 Fujitsu Limited Track access control system for magnetic disk system
FR2614448A1 (fr) * 1987-04-23 1988-10-28 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
WO1988008477A1 (fr) * 1987-04-23 1988-11-03 Logilift Sarl Procede de regulation de la vitesse de rotation d'un moteur electrique
EP0295015A3 (en) * 1987-06-06 1989-05-31 Fujitsu Limited Track access control system for magnetic disk apparatus
EP0335546A3 (en) * 1988-03-28 1990-11-22 Seagate Technology International Off-set nulling system and method for computer disk drives
EP0574637A1 (fr) * 1992-06-19 1993-12-22 EURO CP s.a.r.l. Procédé pour commander un organe déplaçable d'une unité fonctionnelle, et unité fonctionnelle pour sa mise en oeuvre

Also Published As

Publication number Publication date
FR2373819B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1981-06-19

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Legal Events

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TP Transmission of property
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