JPS5746350A - Floppy disk system - Google Patents

Floppy disk system

Info

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
Application number
JP12066680A
Other languages
Japanese (ja)
Inventor
Toshio Tanaka
Masabumi Yamauchi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP12066680A priority Critical patent/JPS5746350A/en
Publication of JPS5746350A publication Critical patent/JPS5746350A/en
Pending legal-status Critical Current

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
JP12066680A 1980-09-02 1980-09-02 Floppy disk system Pending JPS5746350A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (4)

* Cited by examiner, † Cited by third party
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.

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