JPH03137854A - Tape winding method of rotary head type magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To prevent a magnetic tape from deteriorating by winding the magnetic tape around a payoff or take-up side reel which has a small tape winding diameter when the magnetic tape wound around a cylinder is loaded in a cartridge. CONSTITUTION:When a cassette is loaded in a tape recorder(R-DAT) device, a microcomputer 29 carries on a normal processing routine A and when an EJECT switch is pressed, branching to a cassette ejection routine B is performed. When there is no key input or when there is an input other than the input of the EJECT switch, processing corresponding to the current or past key input is performed and when the tape is being driven, the microcomputer 29 measures and stores the FG periods Ts and Tt of a payoff side reel 6 and a take-up side reel 7 from FG detectors 14 and 14' for the reels. Then the Ts and Tt are compared with each other and the tape is wound around the reel 6 when Ts < Tt since the tape winding diameter of the reel 6 is small or wound around the reel 7 when Ts>=Tt.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a rotary head type magnetic recording/reproducing apparatus that uses a rotary head to record or reproduce information on a magnetic tape.

(b) Conventional technology In a magnetic recording and reproducing device that records and reproduces signals using a rotating head, when the magnetic tape that has been pulled out from the cartridge and wound around the drum is stored in the cartridge, the supply side or The magnetic tape is wound on one of the reels on the take-up side, and only when the tape is at the start or end position, the magnetic tape is wound on the reel on the take-up side and the reel on the supply side, respectively. It is known to switch so that the tape is wound into a cartridge. [For example, Japanese Patent Publication No. 52-42044 (
GI IBI 5/66) C (C) Problems to be Solved by the Invention When a magnetic tape is used for a long period of time, loss torque increases in the cartridge due to reasons such as tape winding, which causes damage to the supply side or winding. In the worst case scenario, the reel on the receiving side will not be able to wind the tape, and when the cartridge is pulled out from the magnetic recording/reproducing device in this state, the cartridge will be pulled out with the tape still pulled out, causing damage to the tape. This will result in

In particular, in a data recorder using a rotary head type digital audio tape recorder (hereinafter referred to as R-DAT), the tape is frequently fed forward and backward, resulting in significant deterioration of the magnetic tape.

(d) Means for Solving the Problems The present invention is intended to solve the above problems, and provides a rotary head type magnetic recording/reproducing apparatus that uses a rotary head to record or reproduce information on a magnetic tape. When a magnetic tape that has been pulled out from a cartridge inserted into the rotating head type magnetic recording/reproducing device and wound around a cylinder is stored in the cartridge, which reel on the supply side or the take-up side has a smaller tape winding diameter? The present invention proposes a tape winding method for a rotary head type magnetic recording/reproducing device, characterized in that the magnetic tape is wound into a cartridge by the reel having a smaller tape winding diameter.

(e) Effect: According to the above means, when the magnetic tape that has been pulled out from the cartridge and wound around the cylinder is stored in the cartridge, the tape can be wound on the reel with the smaller tape winding diameter, which has a stronger tape winding force. can.

(F) Embodiment A block diagram of an R-DAT device for realizing the present invention is shown in FIG. 1 and will be described. In the figure, (1) is the tape drive mechanism, (2) is the magnetic head (3) (3)'
(4) is a capstan, (5) is a pinch roller, (6) is a supply side reel, (7) is a take-up side reel, (8) (9) (10 )(1
1) is a tape guide post, (12) (13) (14)
(14)' are cylinder (2) and capstan (4), respectively.
) An FG detector that detects the rotation of the supply reel (6) and the take-up reel (7), (15) a magnetic tape, and (16) a loading drive unit that winds the magnetic tape (15) around the cylinder; Attach the pinch roller (5) to the capstan (
4) Perform the operation of crimping and releasing. (17)
is an input terminal for analog signals such as audio signals, (18) is an S/H circuit that samples and holds the input analog signal, (19) is an A/'D conversion circuit that converts the analog signal into digital, (20) (21) is a recording amplifier;
(22) is a recording/playback switching circuit, (23) is a playback amplifier, (24) is an equalizer that shapes the waveform of the playback signal, (
25) is a D/'A conversion circuit, (26) beams, P, F,
(27) is an output terminal, (28) is a servo system that controls the cylinder (2), capstan (4), and both reels (6) and (7), and (29) is a microcomputer for system control.

Next, the process from when a cassette (cartridge) is inserted into the apparatus until it is ejected in the R-DAT having the above configuration will be explained with reference to the flowchart shown in FIG. First, when a cassette is inserted into the R-DAT device (step 1), the microcomputer (29) continues the normal processing routine ('A) until the EJECT switch is pressed. That is, the presence or absence of external key input is checked in step 2), and when the EJECT switch is pressed, the process branches to the cassette ejection processing routine (B) (step 3).
. Further, if there is no key power or if there is key power other than the EJECT switch, processing is performed in accordance with the current or past key power (step 1). During the process, it is determined whether or not the tape is being driven (step 5). If it is being driven, the microcomputer (29) detects the reel's FG detector (14) (14).

The FG cycle Ts of the supply reel (6) and the FG cycle Tt of the take-up reel (7) are constantly measured and the latest values are stored (step 6).

Thereafter, when it is detected in the normal processing routine (A) that the EJECT switch has been pressed, the routine branches to the cassette ejection processing routine (B) (step 3).

First, if the tape is being driven, stop it (step 7), then move the tape guide posts (8), (9), (lO),
(11) begins to be driven in the tape unloading direction (step 8).

Next, a routine (C
)to go into. Since the number of FG pulses generated during each revolution of the supply reel (6) and the take-up side knoll (7) is equal, the size of the tape winding diameter on both knolls can be determined from the same FG period of both reels. Can be done. In other words, the tape winding diameter is smaller when the FG cycle is shorter, so by comparing the values of the FG cycles Ts and Tt that were last measured and stored in step 6, it is possible to determine the size of the tape winding diameter at the time of cassette eject. (Step 9). Therefore, if Ts<Tt, the tape winding diameter of the supply reel (6) is small, so the take-up reel (7) is fixed and the tape is wound on the supply reel (6) (step 10). If Ts≧Tt, the supply reel (6) is in a fixed state and the tape is wound up with the take-up reel (7) (step 11). Thereafter, the cassette is ejected from the device (step 12), and the E.JECT operation is completed (step 13).

(g) Effects of the Invention In the present invention, when a magnetic tape is pulled out from a cartridge inserted into a rotary head type magnetic recording/reproducing device and wound around a cylinder and is stored in the cartridge, the tape winding diameter on the supply side or winding side is Since the tape winding method of the present invention is configured to wind the tape with a small reel of Extremely useful.

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram when the tape winding method of the present invention is applied to R-DAT, and FIG. 2 is a flowchart for explaining the tape winding method of the present invention. (3) (3)'...Magnetic head, (15)...Magnetic tape, (6)...Supply side reel, (7)...Take-up side reel, (29)...Microcomputer. Dehajin Sanyo Denki Co., Ltd.

Claims (1)

[Claims] (1) In a rotating head type magnetic recording/reproducing device that records on or plays back on a magnetic tape using a rotating head, the tape is pulled out from a cartridge inserted into the rotating head type magnetic recording/reproducing device and wound around a cylinder. When storing a magnetic tape into a cartridge, it is determined which reel on the supply side or take-up side has a smaller tape winding diameter, and the reel with the smaller tape winding diameter is used to wind the magnetic tape into the cartridge. A tape winding method for a rotary head type magnetic recording/reproducing device, characterized in that: