JPS5538612A - Magnetic tape drive system - Google Patents
Magnetic tape drive systemInfo
- Publication number
- JPS5538612A JPS5538612A JP10888078A JP10888078A JPS5538612A JP S5538612 A JPS5538612 A JP S5538612A JP 10888078 A JP10888078 A JP 10888078A JP 10888078 A JP10888078 A JP 10888078A JP S5538612 A JPS5538612 A JP S5538612A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- motor
- short
- circuit
- trq
- 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
Links
Landscapes
- Stopping Of Electric Motors (AREA)
Abstract
PURPOSE: To prevent a cinching phenomenon from occurring by shorting the supply terminal of a motor in a stop of a tape and then by releasing the shorting when a short current exceeds a fuxed value.
CONSTITUTION: The moment stop signal D is inputted to terminal (d), a supply of tape drive signal A stops and a current supply to reel motor M is interrupted. At the same time, signal E from braking control circuit BDU turns transistor TrQ2 ON to short terminals (b) and (c) of motor M, thereby braking motor M. This short current is fed as reel motor voltage signal B back to circuit BDU by resistance R. When signal B exceeds a fixed value, output signal E of circuit BUD is cut off and TrQ2 turns OFF as the result to release terminals (b) and (c); when signal B is less than the fixed value, TrQ2 is turned ON to form a short circuit between terminals (b) and (c). In this way, the braking of motor M is intermitted, so that no cinching phenomenon will occur.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10888078A JPS5538612A (en) | 1978-09-04 | 1978-09-04 | Magnetic tape drive system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10888078A JPS5538612A (en) | 1978-09-04 | 1978-09-04 | Magnetic tape drive system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5538612A true JPS5538612A (en) | 1980-03-18 |
Family
ID=14495920
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10888078A Pending JPS5538612A (en) | 1978-09-04 | 1978-09-04 | Magnetic tape drive system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5538612A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61269696A (en) * | 1985-05-23 | 1986-11-29 | Toshiba Eng Co Ltd | Leonard device |
JPS63167691A (en) * | 1986-12-22 | 1988-07-11 | アンペックス・コーポレーション | Dynamic braking control system for tape driving system |
JPH05219770A (en) * | 1992-01-31 | 1993-08-27 | Sankyo Seiki Mfg Co Ltd | Brake circuit for electric rotating machine |
-
1978
- 1978-09-04 JP JP10888078A patent/JPS5538612A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61269696A (en) * | 1985-05-23 | 1986-11-29 | Toshiba Eng Co Ltd | Leonard device |
JPS63167691A (en) * | 1986-12-22 | 1988-07-11 | アンペックス・コーポレーション | Dynamic braking control system for tape driving system |
JPH05219770A (en) * | 1992-01-31 | 1993-08-27 | Sankyo Seiki Mfg Co Ltd | Brake circuit for electric rotating machine |
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