JP4209613B2 - Ink jet recording apparatus and control method of ink jet recording apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a continuous ink jet recording apparatus and a method for controlling the ink jet recording apparatus, and more particularly to an ink jet recording apparatus capable of finely adjusting the position of ink particles and a method for controlling the ink jet recording apparatus.
[0002]
[Prior art]
In order to form various printing patterns such as letters and figures for various industrial products, ink jet recording apparatuses are used for industrial and consumer purposes. The inkjet recording device is a non-contact printing method that prints by irradiating ink particles from a distance away from the object to be printed, so it can print on curved surfaces, for example, producing displays such as the expiration date, serial number, and model number. Print non-contact on the object. Above all, on-demand inkjet recording devices that discharge ink only when necessary, continuous inkjet recording devices that continuously discharge ink are used for products that are transported one after another on a production line. It has the merit that it can print at high speed and can be used continuously efficiently, and is used in various fields.
[0003]
Continuous ink jet recording devices continuously eject ink particles from the ejection nozzles, deflect the ejected ink particles by the required amount, print on the print object, and print the desired print pattern Form on the object. This ink jet recording apparatus always ejects ink from the ejection nozzles in a printable state, while ink that is not used for printing is collected by a gutter and reused. This will be described with reference to FIG. FIG. 1 is a schematic diagram showing a configuration of a head portion of an ink jet recording apparatus. The head unit 2 shown in FIG. 1 includes an injection nozzle 20, a gutter 21, a charging electrode 22, and a deflection electrode 23 inside a rectangular box-shaped housing 24.
[0004]
[Head part 2 of inkjet recording apparatus]
A liquid supply pipe 3 is connected to the ejection nozzle 20, and an ink supply pipe 30 and a solvent supply pipe 31 are connected to the liquid supply pipe 3 so as to be switchable by a three-way valve V14. The three-way valve is a valve that branches three flow paths. In the example of FIG. 1, either the ink supply pipe 30 or the solvent supply pipe 31 is switched to and connected to the liquid supply pipe 3. When the three-way valve V <b> 14 is switched and the ink supply pipe 30 is connected to the liquid supply pipe 3, the ink pressurized to a predetermined pressure is introduced into the ejection nozzle 20. This ink is ejected at a predetermined speed through an ejection hole (nozzle) 1 formed through one peripheral wall of the ejection nozzle 20. Further, the gutter 21 is arranged so as to face the injection nozzle 20 in the injection direction, and the first recovery pipe 32 is connected to the gutter 21. The injection nozzle 20 is connected to a return path 33 for releasing the pressure of the head unit 2 such as during a falling operation.
[0005]
Inside the injection nozzle 20, a piezoelectric vibrator 4, such as a piezoelectric vibrator, that vibrates when a high-frequency voltage is applied is disposed with the tip of the vibrating piece facing the injection hole 1. When the ink is vibrated during the above-described ink ejection, the ink ejected from the head unit 2 is separated from each other along the ejection path and proceeds as ink particles arranged at a predetermined interval. The charging electrode 22 and the deflection electrode 23 are arranged side by side along the path of such ink particles. The former is arranged at a position where separation into the ink particles occurs, and the latter is located immediately after the position where separation occurs. It is arranged.
[0006]
A voltage controlled in synchronization with the separation into the respective ink particles is applied to the charging electrode 22, and each ink particle passing through the arrangement position of the charging electrode 22 has a different charge individually. Charged. In addition, a high-voltage DC voltage is applied to the deflection electrode 23 to form an electric field having a predetermined intensity, and the ink particles charged by the action of the charging electrode 22 pass through the position where the deflection electrode 23 is disposed. At this time, it is deflected according to the respective electric charges by the action of the electric field, sent out through the delivery port 5 formed in the end wall of the housing 24, and printed on the printing object A facing the delivery port 5.
[0007]
Further, some of the ink particles ejected from the ejection nozzle 20 are not charged when passing through the charging electrode 22, travel straight without being deflected by the action of an electric field, and are captured by the gutter 21 and are collected in the first recovery pipe 32. Collected. In this way, on the surface of the printing object A, a combination of dots formed by the ink particles delivered from the outlet 5 and blanks formed at corresponding positions of the ink particles captured by the gutter 21, Desired patterns such as letters and figures can be formed.
[0008]
[Problems to be solved by the invention]
The ink jet recording apparatus performs printing based on input data. However, no matter how accurate the control is attempted, it is not possible to obtain a print result that completely matches the input data. There are two main causes of errors in the printing result, one is air resistance and the other is electrostatic force. That is, the air resistance received by the flying ink particles is different between the leading ink particles and the ink particles flying immediately thereafter. For this reason, the printing position is different between the preceding ink particles and the succeeding ink particles. Further, since each ink particle has an electric charge, a repulsive force is generated due to the electrostatic force between adjacent ink particles, thereby causing a problem in that the ink flying direction is shifted and the printing position is shifted.
[0009]
The error due to these will be described in detail. Pattern formation by the continuous type ink jet recording apparatus can be performed by setting the ink particles ejected from the ejection nozzle 2 to either the printing particles or the blank particles including the order thereof. At this time, an air resistance force acts on the printing particles used for forming the dots from the front in the traveling direction while traveling off the original path due to the deflection. Further, the printing particles have a charge for deflection, and an electrostatic repulsive force acts between the front and rear printing particles. Accordingly, it is inevitable that the traveling speed of the printing particles changes due to the action of air resistance and electrostatic repulsion.
[0010]
The air resistance force and electrostatic repulsion force that cause such a change in the traveling speed are not uniform for each printing particle. For example, the air resistance force acting on the three ink particles I1, I3, and I6, which are set as the printing particles in FIG. 2, is maximum at the foremost ink particle I1, as indicated by white arrows in the drawing. The ink particle I3 that travels close to the ink particle I1 is minimum, and an intermediate air resistance acts on the ink particle I6 that travels behind the ink particle I3.
[0011]
The electrostatic repulsive force is large between the ink particles I1 and I3 that are close to each other, and is small between the ink particles I3 and I6 that are separated from each other, and these ink particles I1 and I3 are caused by the synergistic action with the air resistance force described above. , I6 will proceed at different speeds.
[0012]
When the traveling speeds are different in this way, the time during which these ink particles I1, I3, and I6 pass through the arrangement position of the deflection electrode 23 changes. Deviations in the traveling path cause the distances between the dots D1, D3, and D6 formed on the surface of the object A to be printed and the blanks B2, B4, B5, B7, and B8 to become non-constant. There is a problem in that the pattern to be distorted causes a reduction in printing quality.
[0013]
As described above, the flying of each ink particle is influenced by various factors, and as a result, an error that the landing position of the ink is different from the planned position is inevitably generated. Many techniques for reducing these have been proposed, but none of them can eliminate the error completely. In general, the more the error is reduced, the more complicated the control becomes and the more difficult it is to realize.
[0014]
The present invention has been developed in view of such a situation. A main object of the present invention is to provide an ink jet recording apparatus and an ink jet recording apparatus control method capable of obtaining a desired print result even in a situation where the print result does not coincide with input data due to an error or the like. .
[0015]
[Means for Solving the Problems]
In order to achieve the above object, the ink jet recording apparatus of the present invention selectively charges the continuously ejected ink particles, deflects the charged ink particles and strikes the object to be printed, and performs a printing process. The present invention relates to an ink jet recording apparatus. This ink jet recording apparatus displays the print data with respect to the print data to be printed. A display unit; Above Displayed on the display Select the desired pixel from the pixels that make up the print data And a selection unit of the pixel selected by the selection unit According to the input unit for specifying the correction amount and the specification of the input unit, Corresponds to the selected pixel A control unit for controlling the amount of charge charged to the ink particles, The display unit, the selection unit, and the input unit are configured with a graphical user interface. It is characterized by that.
[0016]
Another inkjet recording apparatus of the present invention is the above-described The graphical user interface A character selection unit for selecting a character to be corrected, an enlarged display unit for enlarging and displaying the character selected by the character selection unit, and a detailed setting unit for inputting a correction amount for a desired pixel specified in the enlarged display unit; It is characterized by providing.
[0017]
Furthermore, another ink jet recording apparatus of the present invention includes the above Graphical user interface The correction amount specified in is set by previously setting a range in which the print position can be adjusted by changing the charge amount charged to the ink particles, and a predetermined amount of charge amount corresponding to the upper limit and the lower limit of the set range. And a correction amount is designated in units of the division numerical value.
[0018]
Furthermore, another ink jet recording apparatus of the present invention includes the above Graphical user interface Characters corrected by the above are fixed characters whose printing contents do not change.
[0019]
The control method of the ink jet recording apparatus of the present invention relates to a method for correcting a printing result. The control method of the ink jet recording apparatus includes a step of selectively charging ink particles ejected continuously based on predetermined print data, and deflecting the charged ink particles to strike a print target to perform test printing. And the print data for the print data to be printed On the display And displaying a desired pixel from among the pixels constituting the print data. In the selection section Select the correction amount based on the test printout result. In the input section specify Work with a graphical user interface And a step of performing printing by correcting the charge amount charged to the ink particles according to the correction amount.
[0020]
The ink jet recording apparatus and the control method of the ink jet recording apparatus according to the present invention are arranged on the input data side so that the actual print result becomes a desired result rather than improving the reproducibility so that the print result matches the input data accurately. To be adjusted. The ink jet recording apparatus cannot obtain a printing result that completely matches the input data, and an error always occurs there. In the conventional ink jet recording apparatus, when the same print data is inputted and printed, each ink particle is basically hit at the same position. In other words, the error for the input data is reproduced for the same input data. In the present invention, the print position is corrected by adjusting the charge amount when charging the ink particles based on the input data. In other words, the print result is corrected by applying correction to the input data side to obtain a desired print. As a result, the landing position of the ink particles can be arbitrarily changed even with the same print content, and the print result desired by the user can be obtained.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the following embodiments exemplify an inkjet recording apparatus and an inkjet recording apparatus control method for embodying the technical idea of the present invention, and the present invention relates to an inkjet recording apparatus and an inkjet recording apparatus. The control method is not specified as follows.
[0022]
In addition, this specification never specifies the member shown in the claims as the member of the embodiment. In addition, the size and positional relationship of members shown in each drawing may be exaggerated for clarity of explanation.
[0023]
In this specification, the term “character” includes not only alphabets, numbers, Greek letters, and Roman numerals, but also hiragana, kana, kanji, and other foreign language characters as well as user-defined external characters. In addition, logos, barcodes, two-dimensional codes, etc. are included. However, variables that change the print contents are excluded. For example, it is not used for renewal characters whose printing contents differ depending on the printing target, such as a serial number and a shelf life.
[0024]
Further, in this specification, the ink particle basically refers to one particle of the flying ink. In the printing result, it is assumed that one circular printing is executed by one ink particle. However, it goes without saying that it is also possible to employ a method of printing by landing a plurality of ink particles at the same position or slightly shifted positions.
[0025]
The ink jet recording apparatus and the control method of the ink jet recording apparatus according to the present invention are more effective than the approach of controlling the print result to exactly match the input data so that the desired print result can be finally obtained. The input data side is adjusted in accordance with the above, and a desired print result is obtained by trial and error. Specifically, the print position can be finely adjusted by adjusting the charge amount charged to the ink particles. The charge amount is set in advance so that the ink particles land at appropriate positions according to the input data. The amount of charge is slightly changed depending on whether or not several ink particles are printed. The charge amount is determined by a charge voltage obtained by D / A converting the signal from the control unit 6. In order to change the charge amount, the signal from the control unit 6 is changed. Therefore, in the present invention, when the user selects a specific printing dot and inputs a correction value, the control unit controls the charging voltage applied to the ink particles corresponding to the selected dot to a value corresponding to the correction value. By adjusting the signal from 6, the desired correction is realized.
[0026]
FIG. 3 shows the configuration of the head portion of the ink jet recording apparatus according to one embodiment of the present invention. The ink jet recording apparatus shown in this figure includes a head unit 2, a control unit 6 connected to the head unit 2, and an input unit 7 connected to the control unit 6 and instructing correction by a user.
[0027]
[Head 2]
The configuration of the head unit 2 of the ink jet recording apparatus according to the embodiment of the present invention is substantially the same as that of the conventional head unit 2 shown in FIG. The head unit 2 includes an ejection nozzle 20 that ejects ink or a solvent in one direction, a collection gutter 21 that is disposed so as to face the ejection path of the ejection nozzle 20, and the ejection nozzle 20 to the gutter 21. A charging electrode 22 and a deflection electrode 23 arranged side by side along the ejection path are provided inside a box-shaped housing 24.
[0028]
The head unit 2 includes the ejection nozzle 2, the gutter 21, and the charging electrode 22 and the deflection electrode 23 as deflection means inside a rectangular box-shaped housing 24, and supplies the ejection nozzle 2 through an ink supply pipe 30. The pressurized ink to be ejected is ejected from the ejection hole 1 on one side of the ejection nozzle 2 while being vibrated by the piezoelectric vibrator 4, and some of the ink particles separated from each other in accordance with the vibration are charged to the charging electrode 22. Further, the deflecting electrode 23 deflects the liquid and feeds it from the delivery port 5 formed in the housing 24. The remaining ink particles are captured by the gutter 21 and collected in the collection tube 20.
[0029]
As described above, the ink particles (printing particles) deflected by the action of the charging electrode 22 and the deflection electrode 23 and sent out from the delivery port 5 are printed on the object A to be printed facing the delivery port 5. As a result, dots are formed on the surface of the object A to be printed. Ink particles (blank particles) that are not deflected by the action of the charging electrode 22 and the deflecting electrode 23 are collected from the gutter 21 without being sent out from the delivery port 5, and at this time, a blank is formed at the target position of the object A to be printed. The
[0030]
On the object to be printed A, a dot pattern arranged in a line in the direction of deflection is formed by a combination of dots formed by the printing particles and blanks formed at corresponding positions of the blank particles. Such a dot pattern is formed on the surface of the object A by changing the combination of dots and blanks while moving the object A in a direction substantially perpendicular to the direction of deflection. A desired printing pattern is formed as an aggregate of dot patterns obtained at each moving position.
[0031]
Therefore, some of the ink particles ejected from the ejection nozzle 2 are made into one unit, and the ink particles contained in each unit are changed to either the printing particles or the blank particles according to the dot pattern to be formed. A desired printing pattern can be formed by setting including the order.
[0032]
The ink particles ejected from the ejection nozzle 2 are charged with a charge corresponding to the applied voltage when passing through the charging electrode 22 as described above, and are deflected corresponding to the respective charges when passing through the deflection electrode 23. Given a quantity and deflected. Therefore, after the setting of the printing particles and the blank particles as described above, the voltage applied to the charging electrode 22 is controlled in accordance with the timing when these particles are separated into the ink particles. A pattern can be formed.
[0033]
[Control unit 6]
The control unit 6 of the ink jet recording apparatus shown in FIG. 3 sets the printing particles and the blank particles, and sets the particle size of the printing particles or the blank particles as target particles, and sets an appropriate interval therebetween. The number of thinned grains to be inserted is set to ensure, and the applied voltage of the charging electrode 22 is controlled according to these settings.
[0034]
The control unit 6 is connected to an input unit 7 which is operated by a user in order to specify a printing pattern to be formed and to correct these stamp patterns. The input unit 7 is configured to be able to specify a pre-stored printing pattern such as numerals and alphabets and a special printing pattern such as a user's own logo. In accordance with the designation of the printing pattern at the input unit 7, the control unit 6 sets the number corresponding to the number of dots in one row as one unit for each of the plurality of rows of dot patterns constituting the printing pattern. The operation is performed to set the particle type of the ink particles contained in the ink particles to either the printing particles or the blank particles including the arrangement order thereof. The control unit 6 refers to the type of each ink particle (whether it is a printing particle or a blank particle), and the thinned-out particle to be inserted after the ink particle with the type set (hereinafter referred to as the target particle). The number of particles is set based on the type of target grain, the type of target grains located before and after the target grain (hereinafter referred to as the front and rear grains), and the charge applied when the target grain is a printed particle. To do.
[0035]
The control unit 6 recognizes the arrangement order of the printing particles and the blank particles, and the set number of thinning grains to be inserted before or after them, and issues a control command to the charging electrode 22 according to this recognition. The applied voltage is controlled in accordance with the timing at which each particle set as a printing particle, blank particle or thinned particle is separated into ink particles. The control unit 6 is given a signal synchronized with the vibration from the piezoelectric vibrator 4 attached to the ejection nozzle 2, and this signal is used to know the timing of separation into ink particles. Yes.
[0036]
In addition, the control unit 6 includes a table for determining the amount of charge depending on the printing status of several particles before and after the ink particles, and is adjusted so as to obtain an optimum printing result according to input data. Further, the control unit 6 adjusts the amount of charge to be applied in accordance with an instruction from the input unit 7. The control unit 6 does not store the position of the dot to be corrected and the charge amount finally determined in the above correction process, but the difference between the charge amount determined by the table and the charge amount adjusted by the user. Is newly memorized. The control unit 6 is composed of a CPU, MPU, and the like.
[0037]
By the above operation, among the ink particles ejected from the ejection nozzle 2 and separated in accordance with the excitation by the piezoelectric vibrator 4, the ink particles set as the printing particles are charged when passing through the charging electrode 22 and deflected. When passing through the electrode 23, it is deflected in accordance with each other electric charge, sent out from the delivery port 5 of the housing 24, and printed on the object A to be printed to form dots. Further, ink particles set as blank particles are not charged when passing through the charging electrode 22, but go straight without being deflected at the position where the deflection electrode 23 is disposed and are captured by the gutter 21. A blank is formed at the position. By such dots and blanks, a dot pattern arranged in the direction of deflection is formed. Furthermore, thinning grains set in the control unit are inserted before or after the printing particles or blank particles, so that the dot pattern is formed in a state where the dots are arranged at a uniform interval. As a result, the quality of the printing pattern obtained as an aggregate of these dot patterns is improved.
[0038]
[Input unit 7]
The input unit 7 can be configured by a touch panel with a liquid crystal screen. FIG. 4 shows an example of the input unit 7 configured with a touch panel. The input unit 7 shown in FIG. 4 includes a character selection unit 8 provided at the upper part of the screen, an enlarged display unit 9 provided on the lower left side of the character selection unit 8, and detailed settings arranged on the right side of the enlarged display unit 9. Part 10.
[0039]
The correction is performed from the input unit 7 as follows. First, the character selection unit 8 selects a character to be corrected. In the illustrated example, “A” is selected. When the character selection unit 8 cannot display the selection target characters, the left and right arrow buttons 11 are used to scroll the screen left and right. A character can be selected by directly touching the display screen of the character selection unit 8 with a finger or a touch pen. Moreover, you may specify using a cursor etc.
[0040]
The character selected by the character selection unit 8 is enlarged and displayed four times vertically and horizontally by an enlarged display unit 9 provided below the character selection unit 8. In the example of FIG. 4, two characters “A” and “B” are displayed on the enlarged display unit 9, but it goes without saying that the number of characters displayed may be one character or three or more characters. It is also possible to further enlarge only a specific part of the character. This is particularly convenient for fine display when the dots are fine, such as in the case of detailed printing.
[0041]
The dot to be corrected is specified by moving the cursor 12 to the dot to be corrected. The cursor 12 blinks in a rectangular shape substantially equal to the size of the dot, and is moved by the up / down / left / right arrow buttons 13. Alternatively, it can be configured to specify the dot to be corrected by touching it directly with a finger, a touch pen or the like.
[0042]
The characters displayed in the character selection unit 8 and the enlarged display unit 9 display the characters to be printed. Actual printing results are printed with a plurality of ink particles arranged in a substantially circular shape as shown in FIG. For this reason, a pseudo character is represented by a plurality of continuous dots. Therefore, the display in the character selection unit 8 and the enlarged display unit 9 is a virtual display of the print result. In the example of FIG. 4, since the display unit is configured by rectangular pixels, the circular printing result and the displayed image are slightly different depending on the characters. Therefore, the display in the character selection unit 8 and the enlarged display unit 9 can be performed with circular pixels to be close to the image of the printing result.
[0043]
The correction amount is designated as a correction value from the detail setting unit 10 for the dot to be corrected identified in this way. The correction value can be set as appropriate. For example, the dot printing position is adjusted by increasing or decreasing the voltage applied to the charging electrode by an amount corresponding to the correction value specified by the detailed setting unit 10 from the specified value. Can do. The correction value does not need to be displayed by the applied voltage, but is appropriately subdivided within a range adjustable by actual printing, and quantified so that the user can easily understand. In the example of FIG. 4, the correction value can be specified up to ± 99.
[0044]
It should be noted that the display content of the correction target character displayed in an enlarged manner in the enlarged display unit 9 can be changed according to the correction value. For example, when a positive value is input as the correction value, the movement is increased by that amount. Conversely, when a negative value is input, the correction value is moved downward. At this time, the display content on the enlarged display unit 9 does not accurately reflect the actual print content, but is only a guideline. However, by visually displaying the correction amount in this way, the user can now It is possible to grasp sensuously whether or not the correction is to be added. Of course, it is possible not to change the display.
[0045]
In the example of FIG. 4, the number of dots that can be corrected in the enlarged display unit 9 is 100. Furthermore, the set contents can be saved with a number or name and recalled. In the example of FIG. 4, each setting can be stored with a setting number from 00 to 99, and up to 100 can be stored. Before entering the setting screen of FIG. 4, there is a screen for selecting and calling a setting number that has already been saved. In the example shown in the figure, the setting number “01” is selected. Of course, these values are merely examples, and the upper limit that can be set can be changed as appropriate.
[0046]
[Correction process of print result]
The process of correcting the print result using the ink jet recording apparatus according to the embodiment of the present invention will be described below based on the print result example of FIG. Prior to the correction process, the user first performs test printing to confirm the actual printing result. In this example, it is assumed that the printing result as shown in FIG. 5A is obtained as a result of printing the alphabet “A”. In FIG. 5A, since the dot located at the apex of “A” is printed at a slightly lower position, the print result as shown in FIG. 5B is obtained by moving the dot position slightly upward. Consider an example of correcting so that
[0047]
(1) First, the printed character “A” is selected from the input unit 7 and displayed on the enlarged display unit 9, and the vertex dot is designated with the cursor.
[0048]
(2) A correction value is input to the dot from the detailed setting unit 10, and the voltage applied to the ink particle for printing the corresponding dot is changed to adjust the charge amount of the ink particle.
[0049]
(3) Using the adjusted charge amount, a print test is executed again to confirm the ink particle landing.
[0050]
(4) The above (2) to (3) are repeated so that the landing position of the ink particles becomes a desired position.
[0051]
(5) When the desired print result is obtained, the test is terminated, and this charge amount is reflected when actually printing on the print object.
[0052]
Next, the process of calculating the charge amount charged to each ink particle in order to correct the print result will be described based on the flowchart of FIG.
[0053]
After starting the printing operation, the trigger is turned ON in step S1. In step S2, a timer is started in order to delay the trigger, and time measurement is started. In this example, immediately after the printing operation is started, printing is not performed immediately, but after waiting for the printing object to be sequentially delivered to the ink particle ejection position after the printing object to be sequentially sent is detected by a sensor or the like. It is detected by measuring time with a timer.
[0054]
In step S3, the charging voltage V of the ink particles and the thinning amount between the particles are calculated. The reason why the charging voltage V is not output in the step S2, that is, the reason why the charging voltage V is not output immediately after the calculation is performed and the trigger is turned on is that the data to be printed is changed every moment. It is. Since the data to be printed such as the date and time indicating the expiration date cannot be calculated in advance, the charging voltage is calculated during the delay period. When printing only fixed characters whose printing contents do not change, the charging voltage or the like can be calculated in advance.
[0055]
Next, in step S4, it is determined whether or not the ink particle is a correction target, in other words, whether or not the correction amount is a non-zero particle. If the ink particle is to be corrected, the correction value is added to or subtracted from the charging voltage V applied to the ink particle. If it is not a correction target, the process jumps to step S6. In step S6, the corrected charging voltage V is input to the FIFO register and held. Further, in step S7, it is determined whether or not the ink particle is the final ink particle in the printing process. If it is not final, the process returns to step S3 and the above process is repeated until it becomes the final ink particle. This process is terminated when the final ink particles are reached, and the process waits until the next printing starts.
[0056]
On the other hand, when the timer expires, the control unit 6 reads the charging voltage from the FIFO register, performs D / A conversion, and then applies the charging voltage to the charging electrode.
[0057]
【The invention's effect】
As described above, the ink jet recording apparatus and the control method of the ink jet recording apparatus of the present invention can adjust the print position so that the print result desired by the user can be obtained regardless of the characters and setting conditions. is there. This is because the ink jet recording apparatus and the control method of the ink jet recording apparatus of the present invention can specify the dot to be corrected based on the printing result and adjust the correction amount to correct the optimum printing position. The correction amount is converted into a charge amount applied to the corresponding ink particles and sent to the control unit, and the correction can be reflected in the actual printing process. As a result, the user can land each grain at a desired position. By adjusting the print position in units of each print dot, it is possible to realize high quality printing and improve print quality. The
[Brief description of the drawings]
FIG. 1 is a schematic diagram illustrating a configuration of a head unit of a continuous ink jet recording apparatus.
FIG. 2 is an explanatory diagram showing how a dot pattern is formed.
FIG. 3 is a schematic diagram showing a configuration of a head unit of an ink jet recording apparatus according to an embodiment of the present invention together with a configuration of a control system.
4 is an image diagram illustrating an example of an input unit in FIG. 3;
FIG. 5 is an explanatory diagram illustrating a state in which a print result is corrected.
FIG. 6 is a flowchart showing a process of calculating a charge amount to be charged to each ink particle.
[Explanation of symbols]
1 ... Injection hole
2 ... Head
3 ... Liquid supply pipe
4 ... Piezoelectric vibrator
5 ... Outlet
6. Control unit
7 ... Input section
8 ... Character selection part
9 ... Enlarged display area
10 ... Detail setting section
11 ... Arrow buttons
12 ... Cursor
13 ... Arrow buttons
14 ... Three-way valve
20 ... injection nozzle
21 ... Gutter
22 ... Charging electrode
23: Deflection electrode
24 ... Housing
30 ... Ink supply pipe
31 ... Solvent supply pipe
32 ... 1st recovery pipe
33 ... Return route

Claims (5)

An inkjet recording apparatus that performs electrification processing by selectively charging continuously ejected ink particles, deflecting the charged ink particles, and striking the printed object.
A display unit for displaying the print data with respect to the print data to be printed ;
A selection unit for selecting a desired pixel from among pixels constituting print data displayed on the display unit ;
An input unit for specifying the correction amount of the pixel selected by the selection unit ;
A control unit for controlling the amount of charge to be charged to the ink particles corresponding to the selected pixel according to the designation of the input unit;
With
The display unit, selection unit, an ink jet recording apparatus characterized Rukoto input unit such consists of a graphical user interface. The graphical user interface further includes a character selection unit for selecting a character to be corrected, an enlarged display unit for enlarging and displaying the character selected by the character selection unit, and a correction amount for a desired pixel specified in the enlarged display unit. The inkjet recording apparatus according to claim 1, further comprising a detail setting unit for inputting The correction amount specified in the graphical user interface is set by previously setting a range in which the print position can be adjusted by changing the charge amount charged to the ink particles, and the charge amount corresponding to the upper limit and the lower limit of the set range. 3. The ink jet recording apparatus according to claim 1, wherein the correction amount is designated in units of the division numerical value. 4. The ink jet recording apparatus according to claim 1, wherein the character corrected by the graphical user interface is a fixed character whose printing content does not change. In the control method of the ink jet recording apparatus for correcting the printing result,
Selectively charging ink particles ejected continuously based on predetermined print data, deflecting the charged ink particles and hitting a print object to perform test printing;
For the print data to be printed, the print data is displayed on the display unit, a desired pixel is selected from the pixels constituting the print data by the selection unit, and the correction amount is set based on the result of the test print. The process of performing the work specified in the input part with a graphical user interface ;
Correcting the charge amount charged to the ink particles according to the correction amount, and performing printing.
A method for controlling an ink jet recording apparatus, comprising:

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