JPS5446016A - Magnetic recorder-reproducer - Google Patents

Magnetic recorder-reproducer

Info

Publication number
JPS5446016A
JPS5446016A JP11282377A JP11282377A JPS5446016A JP S5446016 A JPS5446016 A JP S5446016A JP 11282377 A JP11282377 A JP 11282377A JP 11282377 A JP11282377 A JP 11282377A JP S5446016 A JPS5446016 A JP S5446016A
Authority
JP
Japan
Prior art keywords
reels
tape
revolutions
numbers
processor
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
JP11282377A
Other languages
Japanese (ja)
Inventor
Mitsunobu Furumoto
Hisayoshi Inoue
Kunikazu Ozawa
Haruo Suenaga
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP11282377A priority Critical patent/JPS5446016A/en
Publication of JPS5446016A publication Critical patent/JPS5446016A/en
Pending legal-status Critical Current

Links

Landscapes

  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)

Abstract

PURPOSE: To stabilize tape tension by detecting the numbers of revolutions of reels and controlling the voltages to be applied to reel motors by way of a microprocessor.
CONSTITUTION: When the tape speed detection signal detected by an encoder 16 turning cooperatively with a reversing roller is applied to a microprocessor 24, the processor 24 selects the frequency divided outputs of the reference frequency signal of an oscillator 47 via changeover circuit 44 according to the tape speeds. On the other hand, the pulses of the period corresponding to reel rotating speeds by the optical detection of the slit of a disk 38 turning together with reels become gate periods and the frequency divided outputs ouptutted by the ccircuit 44 are counted with a counter 45, then the signlas corresponding to the numbers of revolutions of the reels are applied to the processor 24. Then, the processor 24 controls the voltages to be applied to reel motors according to the numbers of revolutions of the reels, according to the numbers of the revolutions of the reels propertional to the tape quantities of the reels. As a result, the tension of the tape proportional to the tape quantities of the reels is easily, surely and constantly controlled
COPYRIGHT: (C)1979,JPO&Japio
JP11282377A 1977-09-19 1977-09-19 Magnetic recorder-reproducer Pending JPS5446016A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11282377A JPS5446016A (en) 1977-09-19 1977-09-19 Magnetic recorder-reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11282377A JPS5446016A (en) 1977-09-19 1977-09-19 Magnetic recorder-reproducer

Publications (1)

Publication Number Publication Date
JPS5446016A true JPS5446016A (en) 1979-04-11

Family

ID=14596419

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11282377A Pending JPS5446016A (en) 1977-09-19 1977-09-19 Magnetic recorder-reproducer

Country Status (1)

Country Link
JP (1) JPS5446016A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56114147A (en) * 1980-02-09 1981-09-08 Otani Denki Kk Tape tension control system
JPS56127954A (en) * 1980-03-07 1981-10-07 Teac Co Tape recorder
US8089726B2 (en) * 2008-03-25 2012-01-03 Oracle America, Inc. Method for counteracting longitudinal oscillations of magnetic tape in a tape drive system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56114147A (en) * 1980-02-09 1981-09-08 Otani Denki Kk Tape tension control system
JPS56127954A (en) * 1980-03-07 1981-10-07 Teac Co Tape recorder
US8089726B2 (en) * 2008-03-25 2012-01-03 Oracle America, Inc. Method for counteracting longitudinal oscillations of magnetic tape in a tape drive system

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