JPS5625254A - Skew correction system - Google Patents

Skew correction system

Info

Publication number
JPS5625254A
JPS5625254A JP9966079A JP9966079A JPS5625254A JP S5625254 A JPS5625254 A JP S5625254A JP 9966079 A JP9966079 A JP 9966079A JP 9966079 A JP9966079 A JP 9966079A JP S5625254 A JPS5625254 A JP S5625254A
Authority
JP
Japan
Prior art keywords
skew
servo signal
count
track
extent
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
JP9966079A
Other languages
Japanese (ja)
Other versions
JPS6321262B2 (en
Inventor
Takeshi Nishizawa
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.)
NIPPON SHIYUUHENKI KK
Fujitsu Ltd
Hitachi Ltd
Original Assignee
NIPPON SHIYUUHENKI KK
Fujitsu Ltd
Hitachi 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 NIPPON SHIYUUHENKI KK, Fujitsu Ltd, Hitachi Ltd filed Critical NIPPON SHIYUUHENKI KK
Priority to JP9966079A priority Critical patent/JPS5625254A/en
Publication of JPS5625254A publication Critical patent/JPS5625254A/en
Publication of JPS6321262B2 publication Critical patent/JPS6321262B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To improve reliability greatly by improving skew corrections by finding a skew correction value from the past skew extent and then by sequentially correcting skews.
CONSTITUTION: Counter 4, when servo signal waveform A exceeds a slice level, starts counting clock E. Then, the counter counts up unitl 2f of the servo signal is detected and counts down on detection of it. When the off-track extent is zero, count value D at the end of counting is zero, but when not, the count-up time and count-down differ in accordance with the off-track estent and final count value D is Δn. This off-track extent Δn is written in memory 6 at a certain address by way of gate circuit 5. Thus, Δn (n represents addresses 1W4) that corresponds to the servo signal is written in memory 6 in every scan. From the past data obtained in this way, skew correction value Cn is founed by an arithmetic expression to control the run of the tape, thereby correcting the skew at any time.
COPYRIGHT: (C)1981,JPO&Japio
JP9966079A 1979-08-04 1979-08-04 Skew correction system Granted JPS5625254A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9966079A JPS5625254A (en) 1979-08-04 1979-08-04 Skew correction system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9966079A JPS5625254A (en) 1979-08-04 1979-08-04 Skew correction system

Publications (2)

Publication Number Publication Date
JPS5625254A true JPS5625254A (en) 1981-03-11
JPS6321262B2 JPS6321262B2 (en) 1988-05-06

Family

ID=14253193

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9966079A Granted JPS5625254A (en) 1979-08-04 1979-08-04 Skew correction system

Country Status (1)

Country Link
JP (1) JPS5625254A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60215717A (en) * 1984-04-07 1985-10-29 Oriental Eng Kk Method for controlling furnace atmosphere in bright heat treatment
JPS6372821A (en) * 1986-09-16 1988-04-02 Osaka Oxygen Ind Ltd Treatment of metal
US4746996A (en) * 1984-06-26 1988-05-24 Hitachi, Ltd. Skew error correction circuit for video signal reproducing apparatus
JPH0273915A (en) * 1988-09-07 1990-03-13 Mitsui High Tec Inc Bright annealing method for metal material

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5046307A (en) * 1973-08-24 1975-04-25
JPS52134409A (en) * 1976-05-03 1977-11-10 Ibm Device for correcting recording media skew

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5046307A (en) * 1973-08-24 1975-04-25
JPS52134409A (en) * 1976-05-03 1977-11-10 Ibm Device for correcting recording media skew

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60215717A (en) * 1984-04-07 1985-10-29 Oriental Eng Kk Method for controlling furnace atmosphere in bright heat treatment
US4746996A (en) * 1984-06-26 1988-05-24 Hitachi, Ltd. Skew error correction circuit for video signal reproducing apparatus
JPS6372821A (en) * 1986-09-16 1988-04-02 Osaka Oxygen Ind Ltd Treatment of metal
JPH0273915A (en) * 1988-09-07 1990-03-13 Mitsui High Tec Inc Bright annealing method for metal material

Also Published As

Publication number Publication date
JPS6321262B2 (en) 1988-05-06

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