JPS54116205A - Magnetic disc driving apparatus - Google Patents
Magnetic disc driving apparatusInfo
- 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
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
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)
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 |
-
1978
- 1978-03-01 JP JP2322478A patent/JPS54116205A/en active Pending
Cited By (3)
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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