JPS5746350A - Floppy disk system - Google Patents
Floppy disk systemInfo
- Publication number
- JPS5746350A JPS5746350A JP12066680A JP12066680A JPS5746350A JP S5746350 A JPS5746350 A JP S5746350A JP 12066680 A JP12066680 A JP 12066680A JP 12066680 A JP12066680 A JP 12066680A JP S5746350 A JPS5746350 A JP S5746350A
- Authority
- JP
- Japan
- Prior art keywords
- rotation
- floppy disk
- fluctuation
- tachometer
- variation
- 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.)
- Pending
Links
Landscapes
- Rotational Drive Of Disk (AREA)
Abstract
PURPOSE: To eliminate the time required for reading inspection and reduce the recording/reproducing process time, by detecting the fluctuation of rotation of a floppy disk.
CONSTITUTION: A tachometer interlocks a synchronous motor, and the output signal of the tachometer is monitored to detect the fluctuation of rotation. If this fluctuation is detected, the recording action is retried by a controller. For instance, if the instantaneous service interruption arises during the operation, the speed of rotation of a synchronous motor 1 varies. This variation is converted into an electric signal by a tachometer 2. Receiving this electric signal, a rotation fluctuation detecting circuit 3 decides whether the variation is within a allowable range or not. If the variation is out of the allowable range, an output is delivered to an external signal line 4 to report a fault. Then a floppy disk controller 9 retries the recording/ reproducing action by use of the external signal. In such way, an abnormal rotation of the floppy disk can be detected.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12066680A JPS5746350A (en) | 1980-09-02 | 1980-09-02 | Floppy disk system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12066680A JPS5746350A (en) | 1980-09-02 | 1980-09-02 | Floppy disk system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5746350A true JPS5746350A (en) | 1982-03-16 |
Family
ID=14791897
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12066680A Pending JPS5746350A (en) | 1980-09-02 | 1980-09-02 | Floppy disk system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5746350A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61155760A (en) * | 1984-12-28 | 1986-07-15 | Saginomiya Seisakusho Inc | Rotary variation measuring apparatus for motor |
JPH0638656A (en) * | 1992-04-21 | 1994-02-15 | Sasakatsu:Kk | Production of fishing bait |
EP0600733A2 (en) * | 1992-12-04 | 1994-06-08 | Sony Corporation | Data recording apparatus |
-
1980
- 1980-09-02 JP JP12066680A patent/JPS5746350A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61155760A (en) * | 1984-12-28 | 1986-07-15 | Saginomiya Seisakusho Inc | Rotary variation measuring apparatus for motor |
JPH0638656A (en) * | 1992-04-21 | 1994-02-15 | Sasakatsu:Kk | Production of fishing bait |
EP0600733A2 (en) * | 1992-12-04 | 1994-06-08 | Sony Corporation | Data recording apparatus |
EP0600733A3 (en) * | 1992-12-04 | 1995-03-15 | Sony Corp | Data recording apparatus. |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS54156285A (en) | Device for detecting chip damage of milling cutter | |
ES8303756A1 (en) | Improvements in and relating to apparatus for checking the validity of coins. | |
JPS569099A (en) | Abnormality detecting method of automatic press | |
JPS5746350A (en) | Floppy disk system | |
JPS5612533A (en) | Vibration monitoring device for rotary machine | |
GB1499632A (en) | Method of detecting newly occurring defects in container linings | |
JPS5353918A (en) | Detecting method for vertical synchronizing signal and its circuit | |
JPS5537226A (en) | Overload monitor for cutting operation | |
JPS5775304A (en) | Power supply for controller | |
JPS55166487A (en) | Variable speed motor | |
JPS5676361A (en) | Detector of tool failure | |
JPS57190212A (en) | Device for detecting abnormality of measuring device | |
JPS5649603A (en) | Automatic train control system | |
JPS56133617A (en) | Vibration monitoring method of rotary machine | |
JPS56117349A (en) | Tape recorder | |
JPS5735749A (en) | Detecting apparatus of abnormality of moisture meter | |
ES2048084A2 (en) | Speed sensor failure detection method and apparatus for an overspeed protection system | |
JPS56124141A (en) | System controlling system for magnetic recording and reproducing device | |
JPS57204404A (en) | Angle detecting device | |
GB1524025A (en) | Overheating detector in gas-cooled electric machine | |
JPS5587260A (en) | Medium recording controller | |
JPS57151860A (en) | Fault detecting device for speed sensor | |
JPS56108551A (en) | Rotary drive apparatus | |
JPS563579A (en) | Detecting method and device for shortcircuit at gto inverter arm | |
JPS5652153A (en) | Tool life judging apparatus |