JPS55163668A - Flexible disk controller - Google Patents

Flexible disk controller

Info

Publication number
JPS55163668A
JPS55163668A JP7047479A JP7047479A JPS55163668A JP S55163668 A JPS55163668 A JP S55163668A JP 7047479 A JP7047479 A JP 7047479A JP 7047479 A JP7047479 A JP 7047479A JP S55163668 A JPS55163668 A JP S55163668A
Authority
JP
Japan
Prior art keywords
circuit
irregular
delay
head
unload command
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
JP7047479A
Other languages
Japanese (ja)
Inventor
Yasunori Sakuma
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 JP7047479A priority Critical patent/JPS55163668A/en
Publication of JPS55163668A publication Critical patent/JPS55163668A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To avoid the local wear of the magnetic coating, by making the contact point irregular to the disk of the magnetic head at the time of the head unloading action.
CONSTITUTION: When the head unload command is given to input terminal 11 after the end of the disk writing and reading, irregular constant generating circuit 13 is triggered to give the irregular constant to delay time control circuit 14. Based on this constant, circuit 14 gives the delay control to delay circuit 12. Circuit 12 gives the delay to head load signal UNL arrived at terminal 11 by the irregular time controlled at circuit 14, and then sends the signal to output terminal 15. Thus the unload command delayed by the irregular time is delivered with the supply of the unload command to irregular delay circuit 10. And this delayed unload command is applied to disk device 9 to carry out the unloading action. In such way, the local wear can be avoided for the magnetic coating.
COPYRIGHT: (C)1980,JPO&Japio
JP7047479A 1979-06-05 1979-06-05 Flexible disk controller Pending JPS55163668A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7047479A JPS55163668A (en) 1979-06-05 1979-06-05 Flexible disk controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7047479A JPS55163668A (en) 1979-06-05 1979-06-05 Flexible disk controller

Publications (1)

Publication Number Publication Date
JPS55163668A true JPS55163668A (en) 1980-12-19

Family

ID=13432552

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7047479A Pending JPS55163668A (en) 1979-06-05 1979-06-05 Flexible disk controller

Country Status (1)

Country Link
JP (1) JPS55163668A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5050015A (en) * 1988-10-22 1991-09-17 Basf Aktiengesellschaft Method and arrangement for reducing wear in a magnetic storage means

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5050015A (en) * 1988-10-22 1991-09-17 Basf Aktiengesellschaft Method and arrangement for reducing wear in a magnetic storage means

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