KR900010892Y1 - Rape back-tention control circuit - Google Patents
Rape back-tention control circuitInfo
- Publication number
- KR900010892Y1 KR900010892Y1 KR2019860009651U KR860009651U KR900010892Y1 KR 900010892 Y1 KR900010892 Y1 KR 900010892Y1 KR 2019860009651 U KR2019860009651 U KR 2019860009651U KR 860009651 U KR860009651 U KR 860009651U KR 900010892 Y1 KR900010892 Y1 KR 900010892Y1
- Authority
- KR
- South Korea
- Prior art keywords
- tape
- control circuit
- back tension
- magnet
- voltage
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
- G11B15/43—Control or regulation of mechanical tension of record carrier, e.g. tape tension
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/02—Control of operating function, e.g. switching from recording to reproducing
Landscapes
- Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
Abstract
내용 없음.No content.
Description
제1도는 본 고안에 따른 테이프 백 텐션 제어회로의 개략적 구성도.1 is a schematic configuration diagram of a tape back tension control circuit according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 공급측 릴 2 : 권취측 릴1 supply side reel 2 winding side reel
3 : 드럼 4 : 텐션 암3: drum 4: tension arm
5 : 마그네트 6, 7 : 호올소자5: magnet 6, 7: arc element
8 : 모터구동회로 SP : 스프링8: Motor drive circuit SP: Spring
M : 공급측 릴 모터M: supply side reel motor
본 고안은 테이프 레코더를 이용하여 기록신호를 재생하는 경우에 테이프에 적당한 백 텐션(back tension)을 제공하기 위한 테이프 백 텐션 제어회로에 관한 것이다.The present invention relates to a tape back tension control circuit for providing a suitable back tension to a tape when reproducing a recording signal using a tape recorder.
일반적으로 비디오 테이프 레코더등의 회전헤드방식에 있어서의 테이프 백 텐션 제어는 텐션 암(tension arm)에서 픽업된 기계적인 힘을 테이프 카세트의 공급측 릴에 부착된 텐션 벤드(tension bend)에 전달하여 기계적으로 제어하고 있으므로, 텐션 밴드가 마모될 경우에는 정밀한 백 텐션 제어가 불가능하였다.In general, tape back tension control in a rotating head system such as a video tape recorder transfers mechanical force picked up from a tension arm to a tension bend attached to a supply side reel of a tape cassette. As the tension band is worn, precise back tension control is not possible.
본 고안은 종래의 기계적인 백 텐션제어의 단점을 해결하기 위한 것으로서, 본 고안에서는 텐션 암의 끝단에 마그네트를 장착하여, 이 마그네트의 위치를 호올(Hau)소자로 검출하고, 검출된 전압의 변화를 기준전압과 비교하여 그 차 전압을 공급측 릴 모터에 가함으로써 적절한 백 텐션을 유지하도록 제어하는 것이다.The present invention is to solve the shortcomings of the conventional mechanical back tension control, in the present invention is equipped with a magnet at the end of the tension arm, the position of the magnet to be detected by a hoe (Hau) element, the change in the detected voltage Is compared with the reference voltage and the difference voltage is applied to the supply side reel motor to control to maintain proper back tension.
이하, 첨부된 도면을 참조하여 본 고안을 상세히 설명하기로 한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
본 고안에 따른 테이프 백 텐션 제어회로는 텐션 암(4)의 단부에 부착된 마그네트(5)와, 상기 마그네트의 위치를 검출하기 위한 2개의 호올소자(6) 및 (7), 상기 호올소자(6) 및 (7)로 부터의 검출전압을 증폭하기 위한 전치증폭기(OP1) 및 (OP2)와, 상기 전치증폭기(OP1) 및 (OP2)의 출력전압사이의 차전압을 발생시키기 위한 차동증폭기(OP3) 및 비반전 증폭기(OP4)와, 공급측 릴 모터(M)를 구동하기 위한 모터구동회로(8)에 의해 구성된다.Tape back tension control circuit according to the present invention is a magnet (5) attached to the end of the tension arm (4), two hool element (6) and (7) for detecting the position of the magnet, the hool element ( 6) generating a difference voltage between the preamplifiers OP 1 and OP 2 for amplifying the detected voltages from (7) and (7) and the output voltages of the preamplifiers OP 1 and OP 2 . A differential amplifier OP 3 and a non-inverting amplifier OP 4 , and a motor driving circuit 8 for driving the supply side reel motor M.
테이프의 텐션이 기준에 비해 작을 경우에는, 텐션암(4)이 스프링(SP)의 작용에 의해 우측으로 밀리게 되고, 이에 따라 마그네트(5)는 좌측으로 이동하여, 제1호올소자(6)에는 제2호올소자(7)보다 높은 유도전압이 발생한다.When the tension of the tape is smaller than the reference, the tension arm 4 is pushed to the right by the action of the spring SP, whereby the magnet 5 is moved to the left, so that the first hool element 6 Induced voltage is higher than that of the second No. 7 element.
제1호올소자(6)와 제2호올소자(7)에서 유도된 전압은 각각 전치 증폭기(OP1) 및 (OP2)를 통하여 증폭된 후, 차동 증폭기(OP3)에서 비교 증폭된다. 그런데, 제1호올소자(6)의 유도전압이 제2호올소자(7)의 유도전압보다 높으므로, 차등증폭기(OP3)출력은 기준 바이어스 전압에 비하여 높은 전압이 발생하게 되고, 비반전증폭기(OP4)를 통해 기준 바이어스 보다 높은 전압이 모터 구동회로(8)에 인가되며 공급측 릴(1)에 더강한 역토크를 가함으로써 마그네트(5)가 제1호올소자(6)와 제2호올소자(7)의 중앙으로 오도록 제어한다.The voltages induced by the first and second element devices 6 and 7 are amplified by the preamplifiers OP 1 and OP 2 , respectively, and then compared and amplified by the differential amplifiers OP 3 . However, since the induced voltage of the first hool element 6 is higher than the induced voltage of the second hool element 7, the differential amplifier OP 3 outputs a higher voltage than the reference bias voltage, and thus the non-inverting amplifier. A voltage higher than the reference bias is applied to the motor driving circuit 8 through OP 4 , and the magnet 5 is applied to the first and second elements 6 and 2 by applying a stronger reverse torque to the supply reel 1. Control to come to the center of the element (7).
한편, 테이프의 텐션이 기준에 비하여 커지게 되면, 텐션 암(4)은 스프링(SP)의 작용에 의해 좌측으로 밀리고, 그에 따라 마그네트(5)가 우측으로 이동하여, 제2호올소자(7)에는 제1호올소자(6)보다 높은 전압이 유기된다.On the other hand, when the tension of the tape becomes larger than the reference, the tension arm 4 is pushed to the left by the action of the spring SP, and the magnet 5 is moved to the right accordingly, so that the second arc element 7 The voltage higher than that of the first hool element 6 is induced.
제1호올소자(6)와 제2호올소자(7)의 유도전압은 각종 전치증폭기(OP1) 및 (OP2)에서 증폭된 후, 차동증폭기(OP3)에 의해 기준 바이어스 보다 낮은 전압을 유기시키고, 모터구동회로(8)의 역 바이어스 전압을 작게하여 역토크를 약화시킴으로써 마그네트(5)가 중앙으로 오도록 제어한다.The induced voltages of the first and second element devices 6 and 7 are amplified by various preamplifiers OP 1 and OP 2 and then lowered by a differential amplifier OP 3 to a voltage lower than the reference bias. The magnet 5 is controlled to come to the center by reducing the reverse bias voltage of the motor drive circuit 8 to reduce the reverse torque.
상술한 바와 같이, 본 고안에 따르 테이프 백 텐션 제어회로는, 직접 구동방식의 릴모터를 사용할 경우, 모터 자체에 역 전압을 인가하여 테이프 백 텐션을 적절하게 조절할 수 있도록함으로써, 기계적인 테이프 백 텐션 조절장치에서 텐션 밴드등의 마모로 인해 정밀한 백 텐션 조절이 어려운 단점을 전기적으로 제어함으로써 완전히 해결할 수 있다.As described above, the tape back tension control circuit according to the present invention, when using a direct drive reel motor, by applying a reverse voltage to the motor itself to adjust the tape back tension appropriately, mechanical tape back tension It can be completely solved by controlling electrically the disadvantage that precise back tension adjustment is difficult due to wear of tension band and so on.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019860009651U KR900010892Y1 (en) | 1986-07-05 | 1986-07-05 | Rape back-tention control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019860009651U KR900010892Y1 (en) | 1986-07-05 | 1986-07-05 | Rape back-tention control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR880003233U KR880003233U (en) | 1988-04-13 |
| KR900010892Y1 true KR900010892Y1 (en) | 1990-12-08 |
Family
ID=19253398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019860009651U KR900010892Y1 (en) | 1986-07-05 | 1986-07-05 | Rape back-tention control circuit |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR900010892Y1 (en) |
-
1986
- 1986-07-05 KR KR2019860009651U patent/KR900010892Y1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR880003233U (en) | 1988-04-13 |
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Payment date: 19970829 Year of fee payment: 10 |
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