KR100234428B1 - Paper jam detecting and removing method - Google Patents

Abstract

The present invention relates to a method for detecting and ejecting a paper jam during printing by detecting a change in an encoder strip, and when the carriage equipped with a head cartridge does not change in the output of the encoder strip for a predetermined time while moving. When the carriage is caught on the paper and it cannot be printed, the current carriage movement direction is checked, and it moves in the opposite direction to the current moving direction to release the paper jam and eject the paper. It is composed of features.

Therefore, the carriage equipped with the head cartridge for printing during printing can quickly detect the jam on the paper, and can automatically release the detected paper has the effect of maximizing the user's satisfaction of the device.

Description

How to automatically detect and clear paper jams

The present invention relates to a paper detection method of an inkjet printer, and more particularly, to a method for automatically detecting and ejecting a paper jam during printing by using a change of an encoder strip of a carriage driving motor.

In general, in order to document data or files created on a computer by a user, printing is performed using various image forming apparatuses.

Such an image forming apparatus uses various kinds of office equipment such as printers, facsimiles, and copiers, but in the present invention, when the ink stored in the head cartridge is heated, the pressure in the head cartridge increases, and thus bubbles are formed like soap bubbles. In this case, an inkjet printer which is printed by spraying the generated bubbles through a nozzle and attaching them to printing paper will be described as an example.

The number of nozzles used in the inkjet printer is generally about 64, and the resolution of the picture is generally about 300 to 1200 DPI (Dot Per Inch), depending on the type of head cartridge to be mounted. Or print in mono.

In the inkjet printer, as shown in FIG. 1, when the paper P is loaded into the paper feeder unit 10 by the user, the paper is stalked by the elasticity of the knock-up spring 11 for stalking the paper. When the pickup roller 13 is picked up the paper loaded on the knock-up plate 12 is supplied to the feeder unit 20 in a single sheet to be transported for printing.

The paper conveyed to the conveying device unit 20 is conveyed to the printing device unit 30 by driving the feed roller 21 and the friction roller 22.

When paper is supplied from the transfer device unit 20, the carriage driving motor configured in the carriage mechanism 30 is driven, and accordingly, the belt 34 driving in conjunction with the carriage driving motor drives the carriage shaft. Moving along the left and right along the (35), through the nozzle 33 attached to the head cartridge 32 to be printed on the paper (P) transferred from the transfer unit 20.

Accordingly, the paper P printed by the nozzle 33 mounted on the head cartridge 32 is gradually moved while being printed line by line on the paper P on the base frame 23 and the printed paper ( When P) reaches the paper discharge unit 40, a discharge operation is performed in which the paper P is discharged by the discharge roller 41 and the star-wheel 42.

That is, the printing process of the inkjet printer is transferred to the feeder unit according to a print command when paper is loaded in the paper feeder unit, and the printing unit unit discharges the printed paper through the discharge unit unit according to the controlled printing command, and the series of processes are completed. In this case, there is a problem that the head cartridge is not caught because the paper is curled in the direction of the head cartridge to the left or right side of the data transmitted from the computer during printing.

In addition, if the carriage drive motor is continuously driven in order to continue printing, the paper may be torn or end of life due to overload.

It is an object of the present invention to provide a method for automatically detecting and discharging a paper jam occurring when the carriage driving motor is driven during printing.

In order to achieve this purpose, if the carriage equipped with the head cartridge does not change the output of the encoder strip for a certain period of time during the movement, it is determined that the carriage does not print because of the paper jam, and the current carriage movement direction is checked. When the paper jam is released and discharged in the opposite direction to the moving direction, a new paper is fed to reprint the current page.

1 is a right side view illustrating an operation of an inkjet printer generally used in the related art.

Figure 2 is a block diagram showing the internal configuration of the inkjet printer according to the present invention,

3 is a flowchart illustrating a method for implementing the present invention.

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

Figure 2 is a block diagram showing the internal configuration of the inkjet printer according to the present invention, Figure 3 shows a flow chart for implementing the present invention.

That is, as shown in FIG. 2, the inkjet printer 100 for printing data transmitted to the computer is connected to the memory 140 when the user is connected through the interface unit 140 to print data created on the computer by the user. Central control unit (hereinafter referred to as CPU) 110 for controlling all operations of the inkjet printer 100 in accordance with the program stored in the ROM 131 of 130, and a plurality of operation keys And a display device (OPE) 120 including an LED or LCD indicating an operation state, a ROM (131) storing a program for storing an inkjet printer, and an inkjet printer. It consists of a memory unit 130 composed of a ROM (132), a memory unit for temporarily storing various data generated during execution, and a carriage (160), which is a printing unit for printing.

That is, the carriage 160, which is a printing apparatus driven by the carriage driving motor 150, is a head cartridge driving unit 161 for operating each nozzle of the head by the transmitted data, and a recording element for recording an image on recording paper. The head cartridge 162, which is a recording element for recording ink on a sheet under the control of the inkjet head cartridge driver 161, is formed.

In addition, the detection unit for detecting the change of the strip by the sensor when the carriage moves to the left and right, counting the number of changes of the strip (counting) to detect the position of the head, the drive of the motor by detecting that the speed of the strip changes Encoder strip detection unit 170 receiving the feedback of speed, line feed motor 180 for moving the paper for recording the image data, presence or absence of paper for recording the image data, and feeding-error of paper (Feeding-Error) It consists of a paper detection unit 190 for detecting the.

A method for implementing the present invention will be described with reference to the flowchart of FIG. 3.

First, when a method for detecting a jam is started using the carriage driving motor 150 (S100), the carriage driving motor is driven to determine whether the head cartridge is being printed (S101). The change of the encoder strip is detected by the detection sensor of the encoder strip detection unit 170 which detects the movement position or the like (S102).

If there is no change by checking whether or not the encoder strip is changed (S103), that is, the sensor level of the encoder strip detector 170 continuously changes to high / low and remains the same for a predetermined level without change. If the level is maintained, the register (Counting) to check the change of the strip (Counting) checks the end point (End Point) is confirmed (S104).

If it is not at the end, it is determined that the carriage is jammed in the paper during movement, and if it is at the end, it indicates a normal operation state.

That is, if it is not the end, it is determined that the carriage is jammed in the paper, and the carriage driving motor 150 is controlled in reverse (S105) to move the carriage in the direction opposite to the current moving direction.

At this time, if the change of the encoder strip is detected again (S106), and if no change is detected (S107), it is determined that the carriage has been moved to the end of the moving area, and the movement of the carriage driving motor is stopped (S108). The paper is discharged (S109) by controlling the phase in reverse.

When discharge is completed (S110), the current page is printed again (S111) and then terminated (S112).

As described above, a carriage equipped with a head cartridge for printing during printing can quickly detect a paper jam and automatically release the detected paper, thereby maximizing user satisfaction. .

Claims (2)

A method for detecting a carriage position in accordance with a change in an encoder strip; If the carriage equipped with the head cartridge does not change the output of the encoder strip for a certain period of time while moving, it is judged that the carriage is jammed and not printed. The process of releasing and ejecting the paper jam by moving in the opposite direction to the current moving direction by checking the current carriage movement direction; A paper jam automatic detection and removal method comprising the steps of feeding a new sheet and reprinting the current page. The method of claim 1; The process of determining that the carriage is jammed and not printed is performed on the paper; Determining whether the head cartridge mounted on the carriage is currently being printed, Detecting the change of encoder strip and judging the presence or absence of change, Automatic jam detection and removal method, characterized in that consisting of the process of determining if there is a change endpoint.

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