JPS5637851A - Servo circuit of reel motor of tape recorder - Google Patents
Servo circuit of reel motor of tape recorderInfo
- 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
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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
JPS5848260A (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 |
-
1979
- 1979-08-31 JP JP11199279A patent/JPS5637851A/en active Granted
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
JPS5848260A (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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