JPS55129954A - Slip check system in magnetic tape device - Google Patents

Slip check system in magnetic tape device

Info

Publication number
JPS55129954A
JPS55129954A JP3683479A JP3683479A JPS55129954A JP S55129954 A JPS55129954 A JP S55129954A JP 3683479 A JP3683479 A JP 3683479A JP 3683479 A JP3683479 A JP 3683479A JP S55129954 A JPS55129954 A JP S55129954A
Authority
JP
Japan
Prior art keywords
slip
counter
output
speed
tachometer
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
JP3683479A
Other languages
Japanese (ja)
Inventor
Tadahiro Wada
Yukio Taniyama
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP3683479A priority Critical patent/JPS55129954A/en
Publication of JPS55129954A publication Critical patent/JPS55129954A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To check slip more exactly by starting write modulation when the speed does not reach a fixed value and by comparing tachometer pulses at this time with data pulses.
CONSTITUTION: The output of tachometer 5 is counted as pulse intervals by tachometer pulse sensor 6 and the second counter 7, and the first and the second speeds are detected by speed detection means 9. Now, when the first speed Va is detected, modulating circuit 11 is started to start write. When written data reaches read head 4, the output counts data pulse intervals through the first counter 14 and is applied to synchronizing detector 16. Meanwhile, the third counter 10 starts counting by the output dependent upon the second speed Vb and stops counting when synchronizing detector 16 detects a prescribed period. Then, the output of the third counter 10 is compared with the reference value for no slip by comparator 20 to detect whether slip exists or not. Thus, slip can be checked more exactly.
COPYRIGHT: (C)1980,JPO&Japio
JP3683479A 1979-03-30 1979-03-30 Slip check system in magnetic tape device Pending JPS55129954A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3683479A JPS55129954A (en) 1979-03-30 1979-03-30 Slip check system in magnetic tape device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3683479A JPS55129954A (en) 1979-03-30 1979-03-30 Slip check system in magnetic tape device

Publications (1)

Publication Number Publication Date
JPS55129954A true JPS55129954A (en) 1980-10-08

Family

ID=12480766

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3683479A Pending JPS55129954A (en) 1979-03-30 1979-03-30 Slip check system in magnetic tape device

Country Status (1)

Country Link
JP (1) JPS55129954A (en)

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