JPS5512574A - Automatic inspection unit for head crash - Google Patents

Automatic inspection unit for head crash

Info

Publication number
JPS5512574A
JPS5512574A JP8551378A JP8551378A JPS5512574A JP S5512574 A JPS5512574 A JP S5512574A JP 8551378 A JP8551378 A JP 8551378A JP 8551378 A JP8551378 A JP 8551378A JP S5512574 A JPS5512574 A JP S5512574A
Authority
JP
Japan
Prior art keywords
head crash
section
inspection
occurrence
taken place
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.)
Granted
Application number
JP8551378A
Other languages
Japanese (ja)
Other versions
JPS6114565B2 (en
Inventor
Nobuo Nakamura
Yuji Hisatomi
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP8551378A priority Critical patent/JPS5512574A/en
Publication of JPS5512574A publication Critical patent/JPS5512574A/en
Publication of JPS6114565B2 publication Critical patent/JPS6114565B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Measuring Magnetic Variables (AREA)
  • Magnetic Record Carriers (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

PURPOSE: To enable the inspection in a short time, by providing the function which electrically processes the occurrence of head crash and calculates the position taken place independently of the number of revolutions so that the judgement level can easily be altered at the operator console.
CONSTITUTION: The electric signal depending on the unevenness of the surface of the magnetic disc 8 turning in a given speed and fixed at the drive section 6 is obtained at the detection section 1, it is fed to the speaker at the audio output section 3, and the head crash generation signal S2 is obtained with the head crash discrimination level set at the operator console 4. At the data processing section, the revolution time is measured and stored at the start of the inspection, the position of occurrence is calculated with the occurrence timing of the signal S2 produced, and the number of signals produced is summed. After detecting the angle taken place and the number of sets of the head crash for one track's share, the detection section 1 automatically moves to the center of disc and it inspects the number of tracks set at the console section 4. When the inspection for the entire surface is finished, the inspection data are arranged at CPU 7 and the content is displayed from the output section 5.
COPYRIGHT: (C)1980,JPO&Japio
JP8551378A 1978-07-12 1978-07-12 Automatic inspection unit for head crash Granted JPS5512574A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8551378A JPS5512574A (en) 1978-07-12 1978-07-12 Automatic inspection unit for head crash

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8551378A JPS5512574A (en) 1978-07-12 1978-07-12 Automatic inspection unit for head crash

Publications (2)

Publication Number Publication Date
JPS5512574A true JPS5512574A (en) 1980-01-29
JPS6114565B2 JPS6114565B2 (en) 1986-04-19

Family

ID=13860990

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8551378A Granted JPS5512574A (en) 1978-07-12 1978-07-12 Automatic inspection unit for head crash

Country Status (1)

Country Link
JP (1) JPS5512574A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6410420A (en) * 1987-07-03 1989-01-13 Fujitsu Ltd Inspection system for magnetic disk medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6410420A (en) * 1987-07-03 1989-01-13 Fujitsu Ltd Inspection system for magnetic disk medium

Also Published As

Publication number Publication date
JPS6114565B2 (en) 1986-04-19

Similar Documents

Publication Publication Date Title
JPS56132505A (en) Position detecting method
EG12809A (en) Detection method & apparatus for determining the struck point of a conduit in a dorehole
JPS56148007A (en) Profile measuring apparatus
FR2328967A1 (en) METHOD AND DEVICE FOR VERIFYING THE CORRECT OPERATION OF AN ELECTRIC ROTATION SPEED INDICATOR
JPS5634175A (en) Recording and detection apparatus for cue signal
JPS5692422A (en) Detecting device for oscillation of turbine-driven generator
JPS5458047A (en) Method of metering spacing between cars
JPS5256468A (en) Chattering controller
JPS5424076A (en) Detecting method of rotating speed
JPS54143179A (en) Vehicular display device
JPS5510557A (en) Mobile track measuring device
JPS5436465A (en) Method and device for aural and visual route guiding
JPS531584A (en) Ultrasonic flaw detector
JPS5525827A (en) Player device
JPS5451509A (en) Counter device of tape recorders
JPS5722526A (en) Detecting method for unbalance quantity in rotating body
JPS5386209A (en) Photograph diaphragm value detecting method
JPS5248385A (en) Destruction detecting method and system for fatigue test of steel wire
JPS5424610A (en) Magnetic recorder
JPS5717400A (en) Press control system
JPS5312350A (en) Inspection method of signal transmitter in high speed rotary flaw detector
JPS5562570A (en) Display system for tape running time of tape recorder
HK200696A (en) Method and apparatus for measurement gate display
JPS5217076A (en) Signal generator for detection of unbalance psotions
JPS522548A (en) Method of detecting displacement of center hole of punch-out product