JPS54116205A - Magnetic disc driving apparatus - Google Patents

Magnetic disc driving apparatus

Info

Publication number
JPS54116205A
JPS54116205A JP2322478A JP2322478A JPS54116205A JP S54116205 A JPS54116205 A JP S54116205A JP 2322478 A JP2322478 A JP 2322478A JP 2322478 A JP2322478 A JP 2322478A JP S54116205 A JPS54116205 A JP S54116205A
Authority
JP
Japan
Prior art keywords
speed
emergency
driving mechanism
amplifier
state
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
JP2322478A
Other languages
Japanese (ja)
Inventor
Keizo Hama
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2322478A priority Critical patent/JPS54116205A/en
Publication of JPS54116205A publication Critical patent/JPS54116205A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To safely retreat a magnetic head at a normal speed at the occurrence of a state of emergency with a simple constitution by defining the miximum moving speed of a movable coil driving mechanism based on the results of comparison of a speed voltage signal and the voltage having been preset in the control part.
CONSTITUTION: A comparing amplifier 4, inputted with the respective outputs of a speed detector 2 converting the moving speeds of a movable coil driving mechanism 1 to voltages in cooperation therewith and a maximum defining speed generator 5, supplies a driving current to the mechanism and has intermittent control outputs. A switch 6 selectively connects the respective outputs of a power amplifier 7 and amplifier 4 and the mechanism 1 in accordance with the instruction output of an emergency state detecting circuit 3. Thereby, the driving system of speed feedback type is constituted and since this intermittently controls the driving mechanism, the movable magnetic head may be safely retreated at a normal speed at the occurrence of a state of emergency.
COPYRIGHT: (C)1979,JPO&Japio
JP2322478A 1978-03-01 1978-03-01 Magnetic disc driving apparatus Pending JPS54116205A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2322478A JPS54116205A (en) 1978-03-01 1978-03-01 Magnetic disc driving apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2322478A JPS54116205A (en) 1978-03-01 1978-03-01 Magnetic disc driving apparatus

Publications (1)

Publication Number Publication Date
JPS54116205A true JPS54116205A (en) 1979-09-10

Family

ID=12104659

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2322478A Pending JPS54116205A (en) 1978-03-01 1978-03-01 Magnetic disc driving apparatus

Country Status (1)

Country Link
JP (1) JPS54116205A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5869380U (en) * 1981-11-04 1983-05-11 株式会社リコー floppy disk drive device
WO1986002480A1 (en) * 1984-10-15 1986-04-24 Fanuc Ltd Magnetic head control system for external auxiliary storage devices

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5869380U (en) * 1981-11-04 1983-05-11 株式会社リコー floppy disk drive device
JPS6317072Y2 (en) * 1981-11-04 1988-05-16
WO1986002480A1 (en) * 1984-10-15 1986-04-24 Fanuc Ltd Magnetic head control system for external auxiliary storage devices

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