KR920005304B1 - Manuscript frame moving control method in manusript frame moving copying machine - Google Patents

Abstract

he control method of the copier having a key pad (10), a MPU (20), a sensor (30), a motor driver (40), comprises a process for searching the set up state of copy completion flag, a process for searching the moving direction of document support, a process for searching the position of the first document support among the over run, home position and start position, a process for driving the support in backward direction by couting the torque rising time in the case of the over run position, a process for driving the support in forward direction in the case of the start position.

Description

Platen movement control method of platen type copier

1 is a platen moving state of a platen type copier.

2 is an installation state of the platen detection sensor according to the present invention.

3 is a hardware block diagram for carrying out the present invention.

4 is a plate movement control flow chart according to the present invention.

The present invention relates to a platen movement control method of a platen movable copier, and more particularly, to a platen movement control method of controlling a platen in an overrun position to a start position with a small motor. It is about. Currently, the copier's original scanning method is a scanner moving method where the document glass is fixed and the scanner is moved, and a document moving type copier where the scanner is fixed and the document glass is moved. have. The document glass portable copying machine is usually located in the home position (Home poisition), and the scanning operation is performed after the document glass is moved to the start position at the start of the copying operation.

FIG. 1 is a diagram of a document glass moving state of a document moving type copying machine, (a) is a state diagram in which a document glass is located at a home position, (b) is in a start position, and (c) is a state where scanning is completed. After an overrun condition. Conventional platen type copiers are generally designed to execute copiers at the home position (refer to the position of the platen) as shown in FIG. 3 (a), where a copy key (not shown) When pressed, the platen 6 moving motor is driven to return the platen 6 as shown in FIG. 1 (b). Reverse] direction. When the movement of the document glass 6 reaches the start point of scanning by the return of the document glass 6, the document glass 6 moves in the forward direction as shown in FIG. The scan operation is executed. When the movement of the document glass reaches the overrun position in all directions as shown in FIG. 1 (c), the original scan and copying operations are finished, and the document glass is returned to the home position as shown in FIG. As described above, the document-type mobile copier does not return to the home position at the time when scanning is completed, that is, at the overrun position as shown in FIG. In the conventional platen portable copier, when the copying is performed in the overrun position as shown in FIG. 1 (c), the current consumption is large and the volume is increased by using a large platen motor torque to avoid overloading the platen mobile motor. Has been.

Accordingly, an object of the present invention is to provide a plate movement control method for controlling the movement of a platen to move a platen placed in an overrun position to a start position as a small motor.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 is an installation state of the platen movement detection sensor according to the present invention, (a) is a start position detection magnet switch 8a, a home position detection magnet switch 7a, and an overrun detection magnet switch 9a. It is shown that they are installed in line in 5, 6). (b) shows the start position detecting magnet switch 9a, the home position detecting magnet switch 7A, and the magnets 8b, 7b and 9b for operating the overrun position detecting magnet switch 8a. 6) is shown in FIG. 2, and the second switch (b) is located above the second drawing (a), and the magnet switches are operated according to the movement of each magnet during the forward and backward movement. For example, if the magnet 7b is located above the magnet switch 7a, only the magnet switch 7a is "on" to detect that the document glass is in the home position. When the document glass 6 is returned to the return position and the magnet 8b is placed above the start position detection magnet switch 8a, the start position detection magnet switch 8a is turned "on" to detect start position detection. It is supposed to be. If the document glass 6 is moved in the forward direction by the scanning operation and the magnet 9b is positioned above the magnet switch 9a, the magnet switch 9a is " on " to the overrun position. Will be detected. At this time, the output of each of the magnet switches 8a, 7a, 9a is transmitted to the microprocessor to alarm the position detection.

3 is a hardware block diagram for carrying out the present invention, and includes a keypad 10 having a clear / stop key, a start key, a copy ten key, and the like. A microprocessor (MPU) 20 for controlling the copying operation by inputting information from the keypad 10 and controlling the platen moving motor according to the input of the platen position detection data; Sensor unit 30 for outputting the original position detection data according to the movement of the original glass to the MPU 20, a motor drive 40 for driving the motor drive data output from the MPU 20, and the motor The motor 50 is connected to the output terminal of the drive and driven. In the above configuration, the sensor unit 30 includes three sensors in which the magnet and the magnet switch described above in FIG. 2 are paired. Reference numeral 7 denotes a magnet 7b and a magnet switch 7a, reference numeral 8 denotes a magnet 8b and a magnet switch 8a, reference numeral 9 denotes a magnet 9b and a magnet switch 9a.

4 is a flow chart of a platen movement control according to the present invention.

Hereinafter, the control process of FIG. 4 according to the present invention will be described in detail with reference to FIGS. 1, 2, and 3.

When power is supplied to the system of FIG. 3, the MPU 20 performs an initialization mode and searches whether the copy completion flag is set in the internal register in FIG. 31. In this case, the copy completion flag is set by the MPU in the internal register when the copy operation is completed. The copy completion flag is reset when the document glass returns to the home position. Normally the copy completed flag is in a reset state during the initial operation. If the copy completion flag is in the reset state in step 31, the MPU 30 searches in step 33 whether a start key is input from the keypad 10. If it is determined that the process is pressed in step 33, the MPU 20 outputs motor driving data to the motor drive 40 in step 35 to drive the motor 50. The MPU 30 determines whether the document plate 6 is currently moving in the forward direction in step 33 and jumps to step 39 if it is moving. If it is not the omni-directional movement in step 37, the MPU 20 inputs a detection signal from the sensor unit 30 to search whether the overrun position detection signal is detected. In this case, the sensor unit 30 includes the magnet and the magnet switch as described above in FIG. 2 and outputs a position detection signal according to the movement of the document glass. When the overrun position is not detected in step 39, that is, when the scan is not finished as shown in FIG. 2C, the MPU 20 searches whether the home position is detected in step 41. That is, in step 41, it is searched whether the magnet switch 7a is "on", and when it is not "on", the magnet switch 8a is "on" and the start position is detected. In step 43, the MPU 20 is executed by the output of the sensor unit 30 that provides the MPU 20 with the outputs of the sensors (magnet and magnet switch) operated according to the movement of the document glass 6.

Therefore, the MPU 20 searches for the home position, the start position, and the overrun position with the output signal of the magnet switch output from the sensor unit 30. When the magnet switch 8a is "on", i.e., the overrun state of FIG. 1 (c) in the above 39, 41, 43 search process, the MPU 20 performs the process at 45 when the magnet switch 7a is "on". That is, when the home position (Home-Position) of FIG. 1 (a) is in the process of 51, the magnet switch 8a is in the process of 53 when the start position MPU 20 of FIG. Jump to perform the kick-off process. Normally, since it is originally in the home position, it jumps from step 41 to step 51 to move the document glass 6 in the reverse direction. The MPU 20 returns to step 31 again and repeats steps 33 to 43 to wait for the magnet switch 8a, that is, the document plate to reach the start position. When the document glass moves as shown in FIG. 1 (b) and the magnet switch 8a is turned “on” from the sensor unit 30, the MPU 20 stops the output of the motor drive 40 in step 53. In step 55, the document glass is stopped and the timer is set. If the timer is not set, set the timer in step 57, time-up the value set for the timer in step 59, and move the document glass 6 forward in step 61. Then return. The reason why the document glass is not moved for a certain time is to prevent the document glass from being moved suddenly. When the document glass 6 moves forward in the state of FIG. 1 (b) by the above control, the document glass 6 moves to the overrun position of FIG. 1 (c) which is the completion point of scanning after a predetermined time. Will be reached. The state is detected by the sensor unit 30 is input to the MPU 20, the MPU 20 jumps from 37 to 63 process.

In step 63, the overrun position detection switch, that is, the magnet switch 9a is searched for being “on”. When the overrun position detection is completed in step 63, the MPU 20 jumps to step 67, sets the copy completion plug in the internal register, and stops the advancing of the document glass. That is, the motor driving signal output to the motor drive 40 is blocked.

The MPU 20 that has performed step 67 determines whether the timer is set in step 69, and sets the timer in step 71 when it is not set. If the timer is set, wait until the timer finishes counting in step 73. When the timer is completed, the document glass 6 is started in step 75 in the reverse direction.

When the document glass 6 starts to move backward in the state of FIG. 1 (c) by the above operation, since the copy completion flag is set in step 67, the MPU 20 performs steps 31, 63, and 65. Done. In step 65, the home-position detection switch searches for the magnet switch 8a being turned on.

If the home position as shown in FIG. 1 (b) is detected in step 65, the MPU 20 stops the document glass 6 and resets the kappa completed flag in step 77. This completes the copy operation and returns to the initial ready state. On the other hand, when the document glass 6 is in the position of FIG. 1 (c), i.e., in the overrun position before the print key is pressed, the MPU 20 detects that the print switch is pressed in step 33 described above. Steps 35, 37 and 39 described above are performed.

If the overrun position is detected in step 39, the MPU 20 searches whether the internal timer is set in step 45. If the internal timer is not set in step 45, the MPU 20 sets the timer to a predetermined time and returns in step 47. If the timer is set in step 45, it is checked in step 49 whether the set time is counted. When the counting is completed in step 49, the MPU 20 drives the document glass 6 in the reverse direction in step 51 and returns. At this time, when the timer is set to a predetermined time and the counting is completed, the reason for backward driving the platen is a time to wait until the rotation torque of the motor 50 reaches a constant value. That is, when the rotational torque of the motor 50 becomes a constant value, the document glass 6 is started in the reverse direction by the rotation of the motor 50. Therefore, when the document glass is placed in the overrun position as shown in FIG. 1 (c), after waiting for a predetermined time until the rotation torque of the motor 50 is large, the document glass is moved in the reverse direction by driving the document glass in the reverse direction. Makes it possible.

When the document glass is moved in the reverse direction by the above operation and the home position detection switch, ie, the magnet switch 7a, in the sensor unit 30 is "on", the MPU 20 detects it in step 41. At this time, the MPU 20 repeats the above-described process 51 and starts moving in the initial return direction. In this case, when the initial position of the document glass 6 is in the overrun position, when the print key is pressed, it waits for 0.5 to 1 second, which is a time when the rotation torque of the motor 50 becomes large, and then moves the document glass 6 to the home position. Return to This eliminates the overload condition when the motor is driven because the platen is not driven until the motor has a sufficient torque. Therefore, even if the motor capacity is small, the platen movement control is possible.

As described above, according to the present invention, in the platen movement control apparatus of a platen type portable copying machine, the capacity of the motor is increased due to the overload due to the reverse moment. You can control the movement.

Claims (1)

A keypad 10 having a clear / stop key, a start key, a copy number designation key, and the like, and input information from the keypad 10 to control the copying operation, and according to the input of the platen position detection data. MPU 20 for controlling the moving motor, a sensor unit 30 which is embedded in the document glass and the copier main body to output the document position detection data according to the movement of the document glass to the MPU 20, and the MPU 20 In the plate movement control method of a plate-mounted copier having a motor drive 40 for driving motor drive data outputted from the cross-section and a motor 50 connected to the output terminal of the motor drive and driven, the copying is completed. A flag search process for searching whether a flag is set, and if a print key signal is input when it is determined that the copy completion flag is reset in the search process, the motor is driven and the document glass is transferred. When the document glass is moved in the reverse direction in the document glass moving direction search process and the document glass movement direction search process determines whether the document glass is in the overrun, home position, or start position, A first driving step of counting the torque rise time when determining the overrun position in the first document position searching process and the first position searching process, and driving the document glass in the reverse direction when the count is completed; A second driving step of driving the document glass in the reverse direction when it is determined that the position is the home position in the one-position search process; A third driving step of advancing the document glass when the count is completed; and the completion flag is set or the document movement direction search process in the flag search process described above 2nd document position search process for searching the document position when it is determined to advance in the forward direction, and the copy completion flag is set when it is determined to be the overrun position in the second document position search process, and the forward of the document glass is stopped. And a fourth driving step of driving the document glass backward by counting the drive torque time, and resetting the copy completion flag after stopping the backward movement of the document glass when it is determined that the home position is positioned in the second document position search process. A copy completion flag reset process.

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