JPS5637851A - Servo circuit of reel motor of tape recorder - Google Patents

Servo circuit of reel motor of tape recorder

Info

Publication number
JPS5637851A
JPS5637851A JP11199279A JP11199279A JPS5637851A JP S5637851 A JPS5637851 A JP S5637851A JP 11199279 A JP11199279 A JP 11199279A JP 11199279 A JP11199279 A JP 11199279A JP S5637851 A JPS5637851 A JP S5637851A
Authority
JP
Japan
Prior art keywords
motor
speed
tape
increase
rotating
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
JP11199279A
Other languages
Japanese (ja)
Other versions
JPH0115936B2 (en
Inventor
Kiyoshi Inatome
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP11199279A priority Critical patent/JPS5637851A/en
Publication of JPS5637851A publication Critical patent/JPS5637851A/en
Publication of JPH0115936B2 publication Critical patent/JPH0115936B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To prevent the damage of a tape and tape driving system by detecting abnormal rotation in reel take-up operation and then by bringing a motor under control so that its speed will not exceed a fixed value.
CONSTITUTION: Since detecting method 5 never detects the sag of a tape when the tape is sagging slightly, take-up reel motor 1 increases in rotating speed temporarily in order to absorb the sag. This increase is detected by rotating-speed deciding means 13 and then compared with a reference voltage from potentiometer 18 and in accordance with an increase in the output-side DC voltage of speed modulator 15, the decrease of the output of comparator 20 and the turning-on operation of switch SW2 expressing the take-up operation of motor 1 are detected by rotation- direction detecting means 16 to turn on diode 19. Then, the base potential of transistor 2 is suppressed to the potential of the traveling contact of potentiometer 18, so that the increase of the rotating speed of motor 1 will be suppressed. Then, switch SW2 turns off when the sag is eliminated, releasing the rotating-speed increase suppressing operation of motor 1.
COPYRIGHT: (C)1981,JPO&Japio
JP11199279A 1979-08-31 1979-08-31 Servo circuit of reel motor of tape recorder Granted JPS5637851A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11199279A JPS5637851A (en) 1979-08-31 1979-08-31 Servo circuit of reel motor of tape recorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11199279A JPS5637851A (en) 1979-08-31 1979-08-31 Servo circuit of reel motor of tape recorder

Publications (2)

Publication Number Publication Date
JPS5637851A true JPS5637851A (en) 1981-04-11
JPH0115936B2 JPH0115936B2 (en) 1989-03-22

Family

ID=14575224

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11199279A Granted JPS5637851A (en) 1979-08-31 1979-08-31 Servo circuit of reel motor of tape recorder

Country Status (1)

Country Link
JP (1) JPS5637851A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5848260A (en) * 1981-09-14 1983-03-22 Teac Co Reel motor driving circuit
JPS5848259A (en) * 1981-09-14 1983-03-22 Teac Co Reel motor driving circuit
JPS5848261A (en) * 1981-09-14 1983-03-22 Teac Co Reel motor driving circuit
JPS58133658A (en) * 1982-02-03 1983-08-09 Mitsubishi Electric Corp Magnetic tape running device
JPS58184194A (en) * 1982-04-22 1983-10-27 セイコーエプソン株式会社 Liquid crystal display unit

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5848260A (en) * 1981-09-14 1983-03-22 Teac Co Reel motor driving circuit
JPS5848259A (en) * 1981-09-14 1983-03-22 Teac Co Reel motor driving circuit
JPS5848261A (en) * 1981-09-14 1983-03-22 Teac Co Reel motor driving circuit
JPH0125150B2 (en) * 1981-09-14 1989-05-16 Teac Corp
JPS58133658A (en) * 1982-02-03 1983-08-09 Mitsubishi Electric Corp Magnetic tape running device
JPS58184194A (en) * 1982-04-22 1983-10-27 セイコーエプソン株式会社 Liquid crystal display unit
JPH0510678B2 (en) * 1982-04-22 1993-02-10 Seiko Epson Corp

Also Published As

Publication number Publication date
JPH0115936B2 (en) 1989-03-22

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