JPS54162530A - Magnetic tape transfer apparatus - Google Patents
Magnetic tape transfer apparatusInfo
- Publication number
- JPS54162530A JPS54162530A JP7167878A JP7167878A JPS54162530A JP S54162530 A JPS54162530 A JP S54162530A JP 7167878 A JP7167878 A JP 7167878A JP 7167878 A JP7167878 A JP 7167878A JP S54162530 A JPS54162530 A JP S54162530A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- slow
- control
- capacitor
- instruction
- 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
- Control Of Electrical Variables (AREA)
- Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
Abstract
PURPOSE: To control magnetic fields with high accuracy with a simple constitution by using control circuits of slow-up and slow-down.
CONSTITUTION: When a magnetic field ON instruction is applied to terminal 89, a slow-up control circuit is operated by an R-SFF 88 and along with the output change of an inversion amplifier 124 the phase of the pulses generated by a phase control pulse generating circuit 97 and the conduction angle of a TRIAC 31 gradually change, causing the magnetic field to gradualy increase. When at this time the first comparator 71 detects that the specified magnetic field is reached from the output of the magnetic field detecting coil, it resets an FF 88 and causes the operation of a slow-up circuit to be stopped by an analog switch 86, thus maintaining the magnetic field corresponding to the charging potential of a capacitor 87 as an optimum magnetic field. Next, when a magnetic field OFF instruction is applied to terminal 89, the ouput of a 2-input NAND gate 110 becomes high and the charge having been charged in the capacitor 87 is gradually discharged and therefore the magnetic field also decreases along with this. Thereby, the magnetic field is controlled with high accuracy.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7167878A JPS54162530A (en) | 1978-06-13 | 1978-06-13 | Magnetic tape transfer apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7167878A JPS54162530A (en) | 1978-06-13 | 1978-06-13 | Magnetic tape transfer apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54162530A true JPS54162530A (en) | 1979-12-24 |
JPS6131530B2 JPS6131530B2 (en) | 1986-07-21 |
Family
ID=13467462
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7167878A Granted JPS54162530A (en) | 1978-06-13 | 1978-06-13 | Magnetic tape transfer apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54162530A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6047233A (en) * | 1983-08-26 | 1985-03-14 | Hitachi Ltd | Method and apparatus of contact magnetic transfer |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6340623A (en) * | 1986-08-05 | 1988-02-22 | Toyoda Mach Works Ltd | Transfer device |
-
1978
- 1978-06-13 JP JP7167878A patent/JPS54162530A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6047233A (en) * | 1983-08-26 | 1985-03-14 | Hitachi Ltd | Method and apparatus of contact magnetic transfer |
Also Published As
Publication number | Publication date |
---|---|
JPS6131530B2 (en) | 1986-07-21 |
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