JPS578946A - Tape driver - Google Patents
Tape driverInfo
- Publication number
- JPS578946A JPS578946A JP8191980A JP8191980A JPS578946A JP S578946 A JPS578946 A JP S578946A JP 8191980 A JP8191980 A JP 8191980A JP 8191980 A JP8191980 A JP 8191980A JP S578946 A JPS578946 A JP S578946A
- Authority
- JP
- Japan
- Prior art keywords
- tape
- tape speed
- pulse
- frequency
- oscillator
- 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
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
- G11B15/46—Controlling, regulating, or indicating speed
- G11B15/48—Starting; Accelerating; Decelerating; Arrangements preventing malfunction during drive change
Abstract
PURPOSE:To prevent a tape from damaging by controlling irregularity of winding, looseness etc., by starting reproducing operation in a short time after fast-forwarding, rewinding or stopping operation. CONSTITUTION:The rotational frequency of a rotary roller 4 is proportional to the moving speed of a tape 3, so the period of a pulse 26 is in inverse proportion to the tape speed. At the output of a counter 31 which performs counting operation by inputting as a clock the output of an oscillator 30 oscillating at a constant frequency and the pulse 26 as a gate G signal, tape speed information 32 which is in inverse proportion to the tape speed appears. When the frequency of the pulse 26 to the tape speed V is F1 and the oscillation frequency of the oscillator 30 is F2, the number Nv of pieces of tape speed information 32 is F2/F1, and proportional constant A shown by F1=AV is expressed by the equation 1, where Rr is the radius of the rotary roller 4 and Nr is the number of pulses of a rotary encoder 19 for single rotation, thereby finding the tape speed V by the equation 2. This arithmetic is carried out by a microprocessor 3 which exercises the control over the whole of tape driving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8191980A JPS578946A (en) | 1980-06-16 | 1980-06-16 | Tape driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8191980A JPS578946A (en) | 1980-06-16 | 1980-06-16 | Tape driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS578946A true JPS578946A (en) | 1982-01-18 |
Family
ID=13759856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8191980A Pending JPS578946A (en) | 1980-06-16 | 1980-06-16 | Tape driver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS578946A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0322119A2 (en) * | 1987-11-30 | 1989-06-28 | Matsushita Electric Industrial Co., Ltd. | Information reproducing apparatus for recording tape |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5094908A (en) * | 1973-12-22 | 1975-07-29 | ||
| JPS5459910A (en) * | 1977-10-20 | 1979-05-15 | Sony Corp | Controller of tape running motor |
| JPS5525839A (en) * | 1978-08-10 | 1980-02-23 | Matsushita Electric Ind Co Ltd | Magnetic tape device |
-
1980
- 1980-06-16 JP JP8191980A patent/JPS578946A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5094908A (en) * | 1973-12-22 | 1975-07-29 | ||
| JPS5459910A (en) * | 1977-10-20 | 1979-05-15 | Sony Corp | Controller of tape running motor |
| JPS5525839A (en) * | 1978-08-10 | 1980-02-23 | Matsushita Electric Ind Co Ltd | Magnetic tape device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0322119A2 (en) * | 1987-11-30 | 1989-06-28 | Matsushita Electric Industrial Co., Ltd. | Information reproducing apparatus for recording tape |
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