JPS57501751A - - Google Patents
Info
- Publication number
- JPS57501751A JPS57501751A JP56503018A JP50301881A JPS57501751A JP S57501751 A JPS57501751 A JP S57501751A JP 56503018 A JP56503018 A JP 56503018A JP 50301881 A JP50301881 A JP 50301881A JP S57501751 A JPS57501751 A JP S57501751A
- Authority
- JP
- Japan
- 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
Links
Classifications
-
- 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
- G11B5/5526—Control therefor; circuits, track configurations or relative disposition of servo-information transducers and servo-information tracks for control thereof
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- 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
- G05B19/406—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 monitoring or safety
- G05B19/4062—Monitoring servoloop, e.g. overload of servomotor, loss of feedback or reference
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- 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
- G05B9/00—Safety arrangements
- G05B9/02—Safety arrangements electric
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Human Computer Interaction (AREA)
- Manufacturing & Machinery (AREA)
- Amplifiers (AREA)
- Numerical Control (AREA)
- Safety Devices In Control Systems (AREA)
- Control Of Electric Motors In General (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8031489 | 1980-09-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57501751A true JPS57501751A (OSRAM) | 1982-09-24 |
| JPH0340401B2 JPH0340401B2 (OSRAM) | 1991-06-18 |
Family
ID=10516379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56503018A Expired JPH0340401B2 (OSRAM) | 1980-09-30 | 1981-09-24 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4479177A (OSRAM) |
| EP (1) | EP0060858B1 (OSRAM) |
| JP (1) | JPH0340401B2 (OSRAM) |
| WO (1) | WO1982001264A1 (OSRAM) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3228665A1 (de) * | 1982-07-31 | 1984-02-02 | Robert Bosch Gmbh, 7000 Stuttgart | Schaltungsanordnung fuer ein zyklisch absolutes lagemesssystem |
| JPS5938978A (ja) * | 1982-08-26 | 1984-03-03 | Toshiba Corp | 磁気ヘッド駆動装置 |
| JPS59112308A (ja) * | 1982-12-20 | 1984-06-28 | Fanuc Ltd | 数値制御装置 |
| US4695941A (en) * | 1985-07-29 | 1987-09-22 | General Electric Company | Loss of electrical feedback detector |
| US5200911A (en) * | 1989-05-19 | 1993-04-06 | Nissan Motor Company, Limited | Apparatus for detecting failure occurring in control system for driving load |
| US5091680A (en) * | 1990-02-06 | 1992-02-25 | Seagate Technology, Inc. | Motor brake circuit for magnetic disk drive system |
| US5500799A (en) * | 1994-11-16 | 1996-03-19 | Westinghouse Air Brake Company | Method of operating a locomotive mounted throttle controller between two modes of operation including a transition between such two modes |
| US6571181B1 (en) * | 1999-08-11 | 2003-05-27 | Broadcom Corporation | System and method for detecting a device requiring power |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3149270A (en) * | 1960-11-21 | 1964-09-15 | North American Aviation Inc | Self-adapting servo parameter control means |
| US3462662A (en) * | 1967-04-12 | 1969-08-19 | Lear Siegler Inc | Monitoring and fault correction system for a multiple channel servo actuator |
| US3624479A (en) * | 1970-05-04 | 1971-11-30 | Bendix Corp | Fail inactive, nonredundant time delay monitor |
| FR2221866A1 (en) * | 1973-03-16 | 1974-10-11 | Philips Massiot Mat Medic | Servo-control amplifier with supply failure safeguard - senses speed of motor and controlled via tacho-generator |
| US3932738A (en) * | 1975-01-09 | 1976-01-13 | The Singer Company | Transition monitor for a unit transition counter |
| JPS5325783A (en) * | 1976-08-23 | 1978-03-09 | Hitachi Ltd | Operation supervisary unit for electrically operated valve |
-
1981
- 1981-09-24 JP JP56503018A patent/JPH0340401B2/ja not_active Expired
- 1981-09-24 EP EP81902640A patent/EP0060858B1/en not_active Expired
- 1981-09-24 WO PCT/GB1981/000202 patent/WO1982001264A1/en not_active Ceased
- 1981-11-17 US US06/322,119 patent/US4479177A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| WO1982001264A1 (en) | 1982-04-15 |
| EP0060858A1 (en) | 1982-09-29 |
| US4479177A (en) | 1984-10-23 |
| EP0060858B1 (en) | 1985-04-24 |
| JPH0340401B2 (OSRAM) | 1991-06-18 |