JP2004276314A - Liquid ejector and its ejection confirming method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To confirm ejection with no trouble even in case of a nozzle opening ejecting a liquid hard to recognize visually. <P>SOLUTION: The liquid ejector comprises an ejection confirming sequence control means 44 performing ejection confirming operation of an ejection head 12 by controlling a liquid discharging means 47 and an ejection confirming means 49. The ejection confirming sequence control means 44 has a function for discharging liquid from a plurality of nozzle openings by controlling the liquid discharging means 47, and a function for recording a specified test pattern on an object by controlling the ejection confirming means 49 and driving the ejection head 12 while sustaining a mixed state of a specified liquid at the nozzle opening corresponding to the specified liquid among a plurality of liquids produced when that liquid is discharged, and other liquids. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a liquid ejecting apparatus that ejects liquid droplets from nozzle openings formed in a liquid ejecting head, and an ejection confirming method in the same.
[0002]
[Prior art]
As a typical example of a conventional liquid ejecting apparatus, there is an ink jet recording apparatus provided with an ink jet recording head for image recording. Other liquid ejecting apparatuses include, for example, an apparatus provided with a color material ejecting head used for manufacturing a color filter such as a liquid crystal display, an electrode material (conductive paste) used for forming an electrode such as an organic EL display and an FED (surface emitting display). Examples of the apparatus include an apparatus equipped with an ejection head, an apparatus equipped with a biological organic substance ejection head used for biochip production, and an apparatus equipped with a sample ejection head as a precision pipette.
[0003]
An ink jet recording apparatus, which is a typical example of a liquid ejecting apparatus, has relatively low noise at the time of printing and can form small dots at a high density, and thus is used in many printings including color printing in recent years. .
[0004]
Such an ink jet recording apparatus generally includes an ink jet recording head (liquid ejecting head) mounted on a carriage and reciprocating in the width direction (head scanning direction) of a recording medium such as recording paper, and a recording medium. Feeding means for moving in a direction (media feeding direction) orthogonal to the scanning direction.
[0005]
In this ink jet recording apparatus, printing is performed by discharging ink droplets (droplets) from a recording head onto a recording medium in accordance with print data. By making the recording head mounted on the carriage capable of discharging, for example, black, yellow, cyan, and magenta inks, not only text printing with black ink but also the discharge ratio of each ink can be reduced. By changing, full-color printing is possible.
[0006]
The above-described recording head performs printing by discharging ink pressurized in the pressure chamber from the nozzle opening toward the recording medium as an ink droplet, for example, an increase in ink viscosity due to evaporation of a solvent from the nozzle opening, In addition, there is a problem that printing failure occurs due to solidification of the ink, adhesion of dust, and mixing of air bubbles.
[0007]
For this reason, when the nozzle opening of the recording head is clogged or the ink cartridge is replaced, the nozzle forming surface of the recording head is sealed by the capping means, and the negative pressure from the suction pump (tube pump) is applied. Ink-jet recording is a function that performs a cleaning operation that eliminates clogging due to ink solidification at the nozzle opening and the like and ink ejection failure due to air bubbles entering the ink supply path by suctioning and discharging ink from the nozzle opening by pressure. The device is generally provided with.
[0008]
In addition, in order to check the ejection state at the nozzle openings of the recording head, ink droplets are ejected from the recording head in a predetermined test pattern. There is a discharge confirmation method for determining that a defective nozzle opening has a discharge failure.
[0009]
[Patent Document 1]
JP-A-6-78020 (page 3, FIG. 1)
[0010]
[Problems to be solved by the invention]
However, among the liquids ejected from the recording head, there are colorless and transparent liquids such as processing liquids, or liquids that are not colorless but difficult to visually recognize such as yellow. Is printed, it is extremely difficult or impossible to determine the presence or absence of a missing part in the test pattern. The treatment liquid is a liquid that is applied to the non-printed part to make the gloss between the printed part and the non-printed part of the recording paper uniform, or the surface of plain paper is pre-processed to achieve high-precision printing. It is a liquid or the like for modifying the surface to a suitable surface property.
[0011]
The present invention has been made in consideration of the above circumstances, and has as its object to discharge a colorless and transparent liquid such as a processing liquid or a non-colorless but hardly visible liquid such as yellow. It is another object of the present invention to provide a liquid ejecting apparatus and an ejection confirming method of the liquid ejecting apparatus which can perform ejection confirmation without any trouble with respect to an opening.
[0012]
[Means for Solving the Problems]
In order to solve the above problem, a liquid ejecting apparatus according to the present invention generates a pressure fluctuation in a liquid inside a pressure chamber communicating with each of a plurality of nozzle openings, and causes droplets from the nozzle openings toward an object. A liquid ejecting head for discharging, a liquid storing unit for storing a plurality of types of liquid supplied to the liquid ejecting head, a liquid discharging unit for discharging the liquid from the plurality of nozzle openings, and driving the liquid ejecting head. Discharging check means for discharging a droplet from the plurality of nozzle openings to record a predetermined test pattern on an object; controlling the liquid discharging means and the discharge checking means to perform a discharge checking operation of the liquid jet head. And a discharge confirmation sequence control means for executing, wherein the discharge confirmation sequence control means controls the liquid discharge means to discharge liquid from the plurality of nozzle openings. And the mixed state of the specific type of liquid and another type of liquid at the nozzle opening corresponding to the specific type of liquid among the plurality of types of liquid, which is generated at the time of discharging the liquid. A function of controlling the discharge confirmation means to drive the liquid ejecting head to record a predetermined test pattern on the object while maintaining the state.
[0013]
Preferably, the specific type of liquid is a colorless and transparent liquid.
[0014]
Preferably, the specific type of liquid is a processing liquid for processing a surface of an object.
[0015]
Preferably, the specific type of liquid is a yellow ink.
[0016]
Preferably, the apparatus further includes a flushing control unit that drives the liquid ejecting head to eject liquid droplets from the nozzle openings to perform flushing, and the ejection confirmation sequence control unit discharges the liquid by the liquid ejection unit. And before recording a predetermined test pattern by the discharge confirming means, the flushing control means may be used in nozzle openings other than the nozzle openings corresponding to the specific type of liquid among the plurality of nozzle openings. It has a function to control and execute flushing.
[0017]
Further, preferably, among the plurality of liquid supply paths that connect the liquid storage unit and the liquid ejection head and supply the plurality of types of liquid from the liquid storage unit to the liquid ejection head, the specific type of the specific type The apparatus further includes a valve unit that can close a liquid supply path that supplies liquid to the liquid ejecting head, wherein the discharge confirmation sequence control unit closes the valve unit during a liquid discharge operation by the liquid discharge unit. Thereby, at the end of liquid discharge, the other type of liquid is mixed into the nozzle opening corresponding to the specific type of liquid due to the negative pressure generated at the nozzle opening corresponding to the specific type of liquid. It has a function to make
[0018]
Preferably, the liquid ejecting head further includes a wiping unit for wiping liquid adhering to a nozzle forming surface of the liquid ejecting head, and a nozzle opening corresponding to the specific type of liquid and the other type of liquid are provided. The positional relationship with the corresponding nozzle opening is set such that the other type of liquid wiped by the wiping means is mixed into the inside of the nozzle opening corresponding to the specific type of liquid.
[0019]
Preferably, the inside of the liquid storage section is at a negative pressure.
[0020]
Preferably, the liquid discharging means has a function of causing a pressure change in the liquid inside the pressure chamber to discharge a droplet from the nozzle opening.
[0021]
Preferably, the liquid discharging means has a function of sucking and discharging the liquid from the plurality of nozzle openings.
[0022]
In order to solve the above-described problems, the present invention provides a liquid ejection method that causes a pressure fluctuation in a liquid inside a pressure chamber communicating with each of a plurality of nozzle openings to discharge droplets from the nozzle openings toward an object. In a method for checking ejection of a liquid ejecting apparatus including a head and a liquid storage unit that stores a plurality of types of liquids supplied to the liquid ejecting head, the liquid is ejected from the plurality of nozzle openings, and the liquid is ejected. The liquid ejection is performed while maintaining the mixed state of the specific type of liquid and another type of liquid at the nozzle opening corresponding to the specific type of liquid among the plurality of types of liquid generated at the time of It is characterized in that a predetermined test pattern is recorded on an object by driving a head.
[0023]
Preferably, the specific type of liquid is a colorless and transparent liquid.
[0024]
Preferably, the specific type of liquid is a processing liquid for processing a surface of an object.
[0025]
Preferably, the specific type of liquid is a yellow ink.
[0026]
Further, preferably, after discharging the liquid from the plurality of nozzle openings, before recording a predetermined test pattern on the object, the nozzle opening corresponding to the specific type of liquid among the plurality of nozzle openings is preferably used. Flushing is performed at nozzle openings other than.
[0027]
Further, preferably, among the plurality of liquid supply paths that connect the liquid storage unit and the liquid ejection head and supply the plurality of types of liquid from the liquid storage unit to the liquid ejection head, the specific type of the specific type By closing a liquid supply path for supplying liquid to the liquid ejecting head during the operation of discharging the liquid from the plurality of nozzle openings, a nozzle corresponding to the specific type of liquid is provided at the end of the liquid discharging operation. The other type of liquid is mixed into the nozzle opening corresponding to the specific type of liquid by the negative pressure generated at the opening.
[0028]
Further, preferably, after the liquid is discharged from the plurality of nozzle openings, when the liquid adhering to the nozzle forming surface of the liquid ejecting head is wiped by the wiping unit, the liquid wiped by the wiping unit is used. Another type of liquid is mixed into the nozzle opening corresponding to the specific type of liquid.
[0029]
Preferably, the inside of the liquid storage section is at a negative pressure.
[0030]
Preferably, the operation of discharging the liquid from the plurality of nozzle openings is performed by causing a pressure change in the liquid in the pressure chamber to discharge droplets from the nozzle openings.
[0031]
Preferably, the operation of discharging the liquid from the plurality of nozzle openings is performed by sucking and discharging the liquid from the plurality of nozzle openings.
[0032]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an ink jet recording apparatus as an embodiment of a liquid ejecting apparatus according to the present invention and a discharge confirmation method in the apparatus will be described with reference to the drawings.
[0033]
In the ink jet recording apparatus according to the present embodiment, each of the pressure generating elements provided corresponding to each of the pressure chambers communicating with each of the plurality of nozzle openings causes a pressure change in the ink in each of the pressure chambers, thereby causing each of the nozzle openings. And an ink jet recording head for discharging ink droplets (droplets) from the ink jet recording head. As the pressure generating element, for example, a piezoelectric vibrator can be used.
[0034]
1 and 2 are perspective views showing a schematic configuration of the ink jet recording apparatus according to the present embodiment. In FIG. 1, reference numeral 1 denotes a carriage. The carriage 1 is guided by a guide member 4 via a timing belt 3 driven by a carriage motor 2, and is reciprocated in the axial direction of a platen 5. I have. The platen 5 supports the recording paper 6 (a type of recording medium) from its back surface and regulates the position of the recording paper 6 with respect to the recording head 12.
[0035]
The carriage 1, the carriage motor 2, the timing belt 3, and the guide member 4 constitute a carriage mechanism that causes the inkjet recording head (liquid ejection head) 12 to scan in the head scanning direction together with the carriage 1.
[0036]
The recording head 12 is mounted on the side of the carriage 1 facing the recording paper 6. In addition, ink cartridges (liquid storage units) 7 and 8 for supplying ink to the recording head 12 are detachably mounted on the carriage 1. The ink cartridge 7 stores black ink, and the ink cartridge 8 stores color ink (cyan, magenta, yellow) and a colorless and transparent processing liquid. The inside of the ink cartridges 7, 8 is maintained at a negative pressure.
[0037]
A cap member 13 is disposed at a home position (right side in FIG. 1), which is a non-printing area of the ink jet recording apparatus. The cap member 13 moves the recording head 12 mounted on the carriage 1 to the home position. Sometimes, the recording head 12 is configured to be pressed against the nozzle forming surface to form a closed space between the recording head 12 and the nozzle forming surface. A suction pump 10 for applying a negative pressure to a sealed space formed by the cap member 13 is disposed below the cap member 13.
[0038]
In the vicinity of the printing area side of the cap member 13, a wiping means 11 provided with an elastic plate such as rubber is disposed so as to be able to advance and retreat in a horizontal direction, for example, with respect to the movement locus of the recording head 12. When reciprocating to the member 13 side, the nozzle forming surface of the recording head 12 can be wiped as necessary.
[0039]
The ink jet recording apparatus according to the present embodiment further includes a medium feeding mechanism that intermittently conveys the recording paper 6 on which printing (recording) is performed by the recording head 12 in a medium feeding direction orthogonal to the head scanning direction. I have.
[0040]
Next, with reference to FIG. 3, a description will be given of a plurality of valve units capable of closing each of a plurality of ink supply paths that connect the ink cartridges 7 and 8 and the recording head 12 for each of a plurality of types of ink.
[0041]
As shown in FIG. 3, the valve unit 30 has a valve mechanism 31 and a driving mechanism 32 thereof. The valve mechanism 32 includes a tube 33 provided on the carriage 1 and forming a part of the ink supply path 21. A flexible thin portion 34 is formed in the middle of the tube 33. The drive mechanism 32 has an actuator 35, which includes a push rod 36 which can move forward and backward. The pressing rod 36 is disposed so as to face the flexible thin portion 34 of the tube 33. By driving the actuator 35 to advance the pressing rod 36, the flexible thin portion 34 of the tube 33 is pressed and As a result, the ink supply path 21 is closed, or the flow path resistance increases. An ink supply path 21 is formed in the carriage 1 for each type of liquid, and a valve unit 30 is provided in each of the plurality of ink supply paths 21.
[0042]
FIG. 4 is a block diagram showing a control circuit for controlling the ejection confirmation sequence in the ink jet recording apparatus according to the present embodiment. As shown in FIG. 4, one end of a tube 10 a constituting the suction pump 10 is connected to the cap member 13, and the other end is connected to the waste liquid tank 20. The ink waste liquid discharged into the internal space of the cap member 13 can be discarded to the waste liquid tank 20 via the suction pump 10.
[0043]
Reference numeral 40 in FIG. 4 denotes a host computer, on which a printer driver 41 is mounted. Then, on the utility of the printer driver 41, using the input device 42 and the display 43, a known paper size, selection of monochrome / color printing, selection of a recording mode, data such as fonts, a print command, and the like are input. It is configured as follows.
[0044]
When the ejection confirmation operation of the recording head 12 is performed, print data for printing a test pattern is transmitted from the printer driver 41 to the ejection confirmation sequence control unit 44 by inputting a command in the input device 42. . Further, the print data is sent to the ejection confirming means 49, which generates bitmap data based on the print data transferred from the host computer 40, and based on the bitmap data, the head driving means 45. To generate a drive signal, thereby causing the recording head 12 to eject ink.
[0045]
The head driving unit 45 receives a flushing command signal from a flushing control unit 46 controlled by the ejection confirmation sequence control unit 44 in addition to the drive signal based on the print data, and outputs a drive signal for a flushing operation to the recording head 12. It is also configured to output to.
[0046]
Further, the control circuit according to the present embodiment includes a cleaning control unit 47, which is controlled by the discharge confirmation sequence control unit 44, and the pump driving unit 48 operates according to a command from the cleaning control unit 47. The drive of the suction pump 10 is controlled. The cleaning control unit 47, the pump driving unit 48, the suction pump 10, and the cap member 13 constitute a cleaning unit (an example of a liquid discharging unit) that performs cleaning by sucking and discharging the ink and the processing liquid from the nozzle openings.
[0047]
As described above, the ejection confirmation sequence control unit 44 controls the flushing control unit 46, the cleaning control unit 47, and the ejection confirmation unit 49 to execute a predetermined ejection confirmation sequence.
[0048]
Further, the valve opening / closing means 50 sends a drive signal to the actuator 35 of the valve unit 30 provided on the carriage 1 and advances the pressing rod 36 of the actuator 35 to move the flexible thin portion 34 of the tube 33 inward. Then, the desired ink supply path 21 among the plurality of ink supply paths 21 is closed, or the flow path resistance is increased, or the ink supply path 21 is opened by the reverse operation.
[0049]
Further, the carriage driving unit 51 drives the carriage motor 2 in response to a command from the ejection confirmation sequence control unit 49, and moves the recording head 12 to a home position where the nozzle forming surface of the recording head 12 can be sealed by the cap member 13. Move.
[0050]
Next, a description will be given of a discharge confirmation sequence of the ink jet recording apparatus performed by the control circuit shown in FIG.
[0051]
First, the ejection confirmation sequence control unit 44 controls the cleaning unit including the cleaning control unit 47 to execute the cleaning of the recording head 12. During this cleaning operation, only the valve unit 30 corresponding to the processing liquid is closed by the valve opening / closing means 50, so that when the cleaning is completed, the processing liquid is subjected to the negative pressure generated at the nozzle opening corresponding to the processing liquid. The incorporation of colored ink into the corresponding nozzle openings is promoted. Thus, at the time of the cleaning operation, mixing of the colored ink and the colorless and transparent processing liquid occurs at the nozzle opening corresponding to the processing liquid.
[0052]
After the cleaning, the ink and the processing liquid adhering to the nozzle forming surface of the recording head 12 are wiped by the wiping unit 11. Here, in the recording head 12 of the ink jet recording apparatus according to the present embodiment, the positional relationship between the nozzle opening corresponding to the processing liquid and the nozzle opening corresponding to the colored ink is determined by the wiping unit 11 for the colored wiping. The ink is set so as to be mixed into the nozzle openings corresponding to the colorless and transparent processing liquid. For this reason, at the time of wiping performed after cleaning, colored ink is sufficiently mixed into the nozzle openings corresponding to the colorless and transparent processing liquid.
[0053]
Next, the head driving unit 45 is controlled by the flushing control unit 46 to perform flushing at nozzle openings other than the nozzle openings corresponding to the processing liquid. That is, in the nozzle openings corresponding to the colorless and transparent processing liquid, the mixed state of the colorless and transparent processing liquid and the colored ink generated during cleaning and wiping is maintained.
[0054]
Then, in a state where the color mixture occurs at the nozzle opening corresponding to the processing liquid, the ejection confirmation sequence control means 44 controls the ejection confirmation means 49 to print a predetermined test pattern on the recording paper 6.
[0055]
As described above, in the present embodiment, the color mixture is generated at the nozzle openings corresponding to the colorless and transparent processing liquid, and the test pattern is printed in this state. Therefore, the test pattern is discharged from the nozzle openings corresponding to the processing liquid. The droplets are not colorless and transparent but colored. Therefore, it is possible to check the ejection of the nozzle opening corresponding to the colorless and transparent processing liquid without any trouble.
[0056]
【The invention's effect】
As described above, according to the present invention, a specific type of liquid is mixed with another type of liquid at a nozzle opening corresponding to a specific type of liquid, and a test pattern is recorded in this state. Therefore, for example, even if a specific type of liquid is colorless and transparent, it becomes colored by mixing with other types of liquids, so that it is possible to check the ejection of the nozzle openings corresponding to the specific type of liquid without any trouble. It can be carried out.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a schematic configuration of an ink jet recording apparatus as one embodiment of a liquid ejecting apparatus according to the present invention.
FIG. 2 is another perspective view showing a schematic configuration of an ink jet recording apparatus as one embodiment of the liquid ejecting apparatus according to the present invention.
FIG. 3 is an enlarged view showing a valve mechanism / driving mechanism of the ink jet recording apparatus shown in FIGS. 1 and 2 and a periphery thereof;
FIG. 4 is a block diagram illustrating a control circuit that controls an ejection confirmation operation in the inkjet recording apparatus illustrated in FIGS. 1 and 2;
[Explanation of symbols]
1 carriage 6 recording paper (recording medium)
7, 8 ink cartridge (ink storage section)
10 Suction pump 12 Ink jet recording head (liquid jet head)
13 Cap member 21 Ink flow path 30 Valve unit 44 Discharge confirmation sequence control means 45 Head drive means 46 Flushing control means 47 Cleaning control means 48 Pump drive means 49 Discharge confirmation means 50 Valve opening and closing means

Claims (20)

A liquid ejecting head that causes pressure fluctuation in the liquid inside the pressure chamber communicating with each of the plurality of nozzle openings to discharge droplets from the nozzle openings toward the target,
A liquid storage unit that stores a plurality of types of liquid supplied to the liquid ejection head,
Liquid discharging means for discharging liquid from the plurality of nozzle openings,
An ejection confirming unit that drives the liquid ejecting head to eject droplets from the plurality of nozzle openings to record a predetermined test pattern on an object,
Discharge confirmation sequence control means for controlling the liquid discharge means and the discharge confirmation means to execute a discharge confirmation operation of the liquid ejecting head,
The discharge confirmation sequence control means controls the liquid discharge means to discharge liquid from the plurality of nozzle openings, and a specific type of the plurality of liquids generated at the time of discharging the liquid. While maintaining the mixed state of the specific type of liquid and another type of liquid at the nozzle opening corresponding to the liquid of the above, the liquid ejecting head is driven by controlling the discharge confirming means to drive the liquid ejecting head on the object. A liquid ejection device having a function of recording a predetermined test pattern. The liquid ejecting apparatus according to claim 1, wherein the specific type of liquid is a colorless and transparent liquid. The liquid ejecting apparatus according to claim 1, wherein the specific type of liquid is a processing liquid for processing a surface of an object. The liquid ejecting apparatus according to claim 1, wherein the specific type of liquid is yellow ink. A flushing control unit that drives the liquid ejecting head to eject liquid droplets from the nozzle openings to perform flushing;
The discharge confirmation sequence control means, after discharging the liquid by the liquid discharge means, before recording a predetermined test pattern by the discharge confirmation means, the liquid of the specific type of the plurality of nozzle openings The liquid ejecting apparatus according to any one of claims 1 to 4, further comprising a function of controlling the flushing control means to execute flushing at a nozzle opening other than the nozzle opening corresponding to (1). The plurality of liquid supply paths that connect the liquid storage unit and the liquid ejecting head to supply the plurality of types of liquid from the liquid storage unit to the liquid ejecting head are configured to eject the specific type of liquid from the plurality of liquid supply paths. Further comprising a valve unit capable of closing a liquid supply path to be supplied to the head,
The discharge confirmation sequence control means closes the valve unit during the liquid discharge operation by the liquid discharge means, so that at the end of the liquid discharge, the negative pressure generated at the nozzle opening corresponding to the specific type of liquid is discharged. The liquid ejecting apparatus according to any one of claims 1 to 5, having a function of mixing the other type of liquid into a nozzle opening corresponding to the specific type of liquid by pressure. A wiping unit for wiping liquid adhering to the nozzle forming surface of the liquid ejecting head,
The positional relationship between the nozzle opening corresponding to the specific type of liquid and the nozzle opening corresponding to the other type of liquid is such that the other type of liquid wiped by the wiping unit is the specific type of liquid. The liquid ejecting apparatus according to any one of claims 1 to 6, wherein the liquid ejecting apparatus is set so as to be mixed into the inside of the nozzle opening corresponding to (1). 8. The liquid ejecting apparatus according to claim 1, wherein the inside of the liquid storage unit is at a negative pressure. 9. 9. The liquid ejecting apparatus according to claim 1, wherein the liquid discharge unit has a function of causing a pressure change in the liquid inside the pressure chamber to discharge droplets from the nozzle openings. 10. The liquid ejecting apparatus according to claim 1, wherein the liquid discharging unit has a function of sucking and discharging the liquid from the plurality of nozzle openings. A liquid ejecting head that causes a pressure change in the liquid inside the pressure chamber communicating with each of the plurality of nozzle openings to eject droplets from the nozzle openings toward the target, and a plurality of liquid ejecting heads supplied to the liquid ejecting head. In a liquid storage device that stores a liquid of a type, and in a discharge confirmation method of a liquid ejecting apparatus including:
The liquid is discharged from the plurality of nozzle openings, and the specific type of liquid and other types generated at the time of discharging the liquid at the nozzle openings corresponding to the specific type of liquid among the plurality of types of liquids Discharging the liquid ejecting head and driving the liquid ejecting head to record a predetermined test pattern on a target object while maintaining a mixed state with the liquid. The method according to claim 11, wherein the specific type of liquid is a colorless and transparent liquid. The method according to claim 11, wherein the specific type of liquid is a processing liquid for processing a surface of an object. The method according to claim 11, wherein the specific type of liquid is yellow ink. After discharging the liquid from the plurality of nozzle openings, before recording a predetermined test pattern on the object, in the nozzle openings other than the nozzle opening corresponding to the specific type of liquid among the plurality of nozzle openings. The method according to claim 11, wherein the flushing is performed. The plurality of liquid supply paths that connect the liquid storage unit and the liquid ejecting head to supply the plurality of types of liquid from the liquid storage unit to the liquid ejecting head are configured to eject the specific type of liquid from the plurality of liquid supply paths. By closing the liquid supply path to be supplied to the head in the middle of the operation of discharging the liquid from the plurality of nozzle openings, at the end of the liquid discharging operation, the liquid is generated at the nozzle opening corresponding to the specific type of liquid. The ejection confirmation method for a liquid ejecting apparatus according to any one of claims 11 to 15, wherein the other type of liquid is mixed into a nozzle opening corresponding to the specific type of liquid by a given negative pressure. After the liquid is discharged from the plurality of nozzle openings, when the liquid adhering to the nozzle forming surface of the liquid ejecting head is wiped by the wiping unit, the other type of liquid wiped off by the wiping unit The method for confirming discharge of a liquid ejecting apparatus according to any one of claims 11 to 16, wherein the liquid is mixed into nozzle openings corresponding to the specific type of liquid. The method according to any one of claims 11 to 17, wherein the inside of the liquid storage unit has a negative pressure. The operation of discharging the liquid from the plurality of nozzle openings is performed by causing pressure fluctuation in the liquid inside the pressure chamber to discharge droplets from the nozzle openings. The method for confirming ejection of a liquid ejecting apparatus according to any one of claims 1 to 3. 19. The discharge confirmation method for a liquid ejecting apparatus according to claim 11, wherein the operation of discharging the liquid from the plurality of nozzle openings is performed by sucking and discharging the liquid from the plurality of nozzle openings. .

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