KR0139748B1 - Tape safe loading method for vcr - Google Patents

Abstract

The present invention relates to a technology for shortening the loading time while maintaining a stable state when loading a tape in a V-Cal. The capstan motor is driven until the gear is contacted with the reel by detecting a cassette knife being inserted into the tech. Rotate the loading coater in the forward direction until the tape is released from the feed reel shaft and reach the half-loading position, and then rotate the capstan motor in the reverse direction to slightly tension the tape while the idle gear is in contact with the feed reel side. To reduce the starting load of the drum motor, the loading motor is rotated in the reverse direction. When the guide roller is promoted to some extent, the drum motor is rotated in the forward direction. When the drum motor is normally started, the capstan motor is immediately rotated for a predetermined time in the forward direction. Residual loading process after letting these gears contact the take-up reel And performing, when the start-up load on the drum motor is increased beyond the reference value is determined as a start-up failure.

Description

VRC's Tape Safe Loading Method

(A) of FIG. 1 is a schematic diagram of a deck system showing a state in which loading of a tape is completed in a general V-AL.

(b) is a schematic diagram of the deck system showing the jam occurrence state when loading the tape.

Figure 2 is a signal flow diagram for a general tape loading method of VRC.

3 is a loading control block diagram of V-R to which the tape loading method of the present invention is applied.

4 is a schematic diagram of a deck system for explaining the safe loading method of the present invention.

Figure 5 is a signal flow diagram for the tape safe loading method of the VR of the present invention.

* Explanation of symbols for main parts of the drawings

1: cassette 2A: supply reel

2B: reel 3: children gear

4: tape 5: drum motor

6A, 6B: Guide Roller 7: Capstan Motor

8: jam

The present invention relates to a technology for reducing the loading time while maintaining a stable state when loading the tape in the V-Cal, prevents the jam of the tape due to dew or moisture condensation on the drum surface during loading of the tape and reverse rotation The present invention relates to a method of tape safe loading of V-Cal which is suitable for stable loading in a short time without making it impossible.

(A) of FIG. 1 is a schematic diagram showing the loading state of the tape in a general VAL, and (b) of FIG. 1 is a schematic diagram showing a jam state when loading the tape, and FIG. Referring to these as a signal flow chart for the tape loading method will be described in general tape loading method of VCC as follows.

When loading the tape 4 of the deck, the tape 4 starts to be released from the supply reel 2A, and the loading operation is performed considering that it takes much time for the drum motor 5 to rotate at the normal speed. The rotation will start while it is doing.

However, in this case, if there is moisture on the surface of the drum or foreign matter is on the surface of the tape 4, as shown in (b) of FIG. 1, the tape 4 may be loaded in a loading process in which the tape 4 starts to contact the surface of the drum. 4) is attached to the surface of the drum, and the tape 4 of the attached portion is conveyed as it is in accordance with the rotational direction of the drum and causes the jam 8 of the tape 4 as in (b) of FIG. Let's go.

2 is a signal flow diagram for a general loading control method proposed in view of the jam phenomenon as described above.

The capstan motor 7 is briefly driven in the forward direction and then stopped. This is a process of moving the idle gear 3 to the winding reel 2B side, from which the tape 4 wound on the supply reel 2A can be released. It is in a state.

Thereafter, when the loading motor is rotated in the forward direction, the guide rollers 6A and 6B are moved, thereby releasing the tape 4 wound on the 2A, from which the deck rod is half (1/2). Loading) The drum motor is rotated at a reverse 1/2 speed (about 900RM) until the tape 4 is in contact with the surface of the drum half as compared with the regeneration as shown in (b) of FIG. This is to prevent the tape 4 from escaping by the moisture present on the surface of the drum when the tape 4 contacts the surface of the drum.

After the half loading operation is completed, the loading operation is stopped once, the drum motor 5 is started in the forward direction, and when the motor is rotated at the normal speed within a preset time, the loading motor is driven again in the forward direction to complete the loading. If it does not rotate at normal speed, it is regarded as loading failure and unloaded in eject mode.

However, in the loading method as described above, the method of rotating the drum motor in the forward direction in the loading process in which the tape is unloaded from the supply reel side like the former is performed when there is moisture or foreign matter on the drum surface that the humidity sensor cannot detect. In this case, the tape is attached to the drum surface and breaks out, which causes a serious damage to the tape. In the latter loading method, the tape is in contact with the drum surface. Until the drum motor is rotated in the reverse direction and then rotated in the forward direction again, there is a defect that takes a long time for the drum to become normal.

Accordingly, an object of the present invention is to provide a tape safe loading method of V-AL which can prevent the breakout phenomenon that may occur during the tape loading process due to moisture on the drum surface and shorten the loading time by not rotating the drum in the reverse direction. have.

The tape safe loading method of the present invention for achieving the above object is the first step of driving the capstan motor until the deck gear detects the cassette tape is inserted and the idle gear is in contact with the reel, and the tape after the end of the first step The second step of rotating the loading motor in the forward direction until the load is released from the supply reel side to the half loading position, and the tension of the tape is relaxed by rotating the capstan motor in the reverse direction and making the idle gear contact the supply reel side. Rotate the loading motor in the reverse direction to reduce the starting load of the drum motor. If the guide roller is retracted to some extent, the drum motor is rotated forward to the third step. If the drum motor starts normally, the capstan motor is rotated for a predetermined time in the forward direction. After the gear is in contact with the take-up reel, the remaining loading process is performed. When the starting load is increased above the reference value, a fourth step of judging starting failure is performed.

3 is a loading control block diagram of a V-C to which the tape safe loading method of the present invention is applied, and as shown therein, a capstan drum speed detection unit detecting the rotational speeds CFG and DFG of the capster motor and the drum ( 11) and a microcomputer 12 for detecting the detected speeds CFG and DFG and controlling the driving of the deck-based parts according to the key signal selected and input by the user, and the microcomputer 12 of the microcomputer 12. With a drum motor driver 13 for driving the drum motor 5 under control, a loading motor driver 14 for driving a loading motor (not shown), and a capstan motor driver 15 for driving a capstan motor 7. As described above, the operation of the present invention will be described with reference to FIGS. 4 and 5 as follows.

First, the microcomputer 12 detects that the cassette tape is inserted into the deck and drives the capstan motor 7 through the capstan motor driver 15 for t seconds, and drives the loading motor through the loading motor driver 14. When the gear 3 is in contact with the position of ①, that is, the winding reel 2B, the driving of the capstan motor 7 is stopped. (S1, S2)

At this time, when the loading motor is rotated in the forward direction, the tape 4 is released from the supply reel 2A side, and the guide rollers 6A, 6B begin to move from the cassette 1 side to the drum side. ), (6B) stops the driving of the loading motor when the tape 4 reaches the half loading position where the tape 4 is in contact with the surface of the drum. (S3-S5)

When the drum motor 5 is rotated in the forward direction as it is while the tape 4 is half-loaded on the surface of the drum as described above, as soon as there is moisture on the surface of the drum, the tape 4 will break out in the normal orbit. (4) will cause fatal damage.

Therefore, in order to prevent this, the microcomputer 12 rotates the capstan motor 7 in the reverse direction through the capstan motor driving unit 15 for t seconds so that the idle gear 3 is in the position of ②, that is, the supply reel 2A. The contacting side of the loading corner is reversed in order to reduce the starting load of the drum motor 5 by fundamentally preventing the tape 4 from loosening from the supply reel 2A side and then loosening the tension of the tape 4 a little. Rotate for t1 second to move the position of guide rollers 6A and 6B from the position of ③ to the position of ④ and then rotate the drum toner 5 in the forward direction. (S6-S8)

The phenomenon that the tape 4 is released from the supply reel 2A side by the above loading process is prevented by the idle gear 3, and since the loading position is moved from ③ to ④, the tape 4 has a very strong temper. If it is relaxed and there is no moisture or foreign matter on the surface of the drum, the drum toner 5 will start normally.

In this way, when the drum motor 5 is normally started, the microcomputer 12 immediately rotates the capstan motor 7 in the forward direction for t seconds so that the idle gear 3 moves to the position of ①, that is, the winding reel ( 2B) and then start loading again to complete the rest of the loading process (S9-S12).

However, if there is moisture on the surface of the drum in the state where the guide rollers 6A and 6B are moved to the position of ④, the tape that cannot be released (the feed reel 2A cannot be released by the idle gear 3). Is in a state of being attached to the drum, and the starting load of the drum motor 5 is greatly increased, resulting in starting failure. That is, even in this case, the breakout phenomenon of the tape 4 does not occur and the protection can be stably performed. (S13-S15)

For reference, in the normal loading condition in which the surface of the drum has no moisture, the drum motor 5 does not rotate in the reverse direction and then rotates in the forward direction again as described above, so that the time required for the drum start time can be shortened every time. have.

As described in detail above, the present invention, when applied to the loading process of the tape release technology on the supply reel side can prevent the damage of the tape by fundamentally preventing the tape breakout by the moisture of the drum surface, and also the breakout of the tape Since the drum does not need to be rotated in the reverse direction to prevent the phenomenon, the drum motor can be started in about half of the time when the drum motor rotates in the reverse direction and then rotates in the forward direction. It can work. In addition, if the present invention is applied to a motor that does not have a reverse rotation function of the drum motor, such as a stationary V-CAL, the phenomenon of being attached to the surface of the drum due to moisture or foreign matter on the drum surface can be prevented from occurring.

Claims (1)

The first step of driving the capstan motor until the idle gear is in contact with the take-up reel by detecting the cassette tape entering the tech and the loading until the tape is released from the supply reel and reaches the half loading position after the end of the first step. The second process of rotating the motor in the forward direction, the rotation of the loading motor in the reverse direction to reduce the starting load of the drum motor by loosening the tension of the tape slightly by rotating the motor in the reverse direction of the capstan court, and the idle gear in contact with the supply reel side After the guide roller has been retracted to some extent, the third process of rotating the drum motor in the forward direction again, and if the drum motor is normally started, immediately rotate the capstan motor for a predetermined time in the forward direction so that the idle gear is in contact with the take-up reel. If the starting load of the drum motor is increased above the standard value, The safety tape loading method of V-CAL comprising the fourth step of ejecting the step.