Abstract
The purpose of the present invention is to suppress variance in the print quality of an inkjet recording device. In order to solve the above problem, the present invention is an inkjet recording device of a charge control type equipped with two or more nozzles which are disposed side by side in a print head, the inkjet recording device being characterized by the following: having a control unit for performing print control independently for each of a plurality of printing configurations; the control unit having an input unit whereby current values of print elements of each of the printing configurations can be periodically checked, and having an output unit whereby the print elements during a subsequent print can be modified; and in that the control unit further adjusts each of the nozzles for every print so as to cause the charging voltage, deflecting voltage, and ink pressure of the subsequent print to approach a reference value.
Claims
1. An inkjet recording device having a plurality of print configurations including nozzles which eject ink to form ink particles, charging electrodes which apply charging voltages to the ink particles to charge the ink particles, deflecting electrodes which deflect the charged ink particles, and a gutter which recovers the ink particles which are not used for printing, the inkjet recording device comprising a control unit which independently performs print control on the plurality of print configurations, wherein the control unit includes an input unit which can periodically check current values of print elements of each of the print configurations and an output unit which can change print elements of a next print time, and wherein the control unit adjusts each of the nozzles for each print so that a charging voltage, a deflecting voltage, and an ink pressure of a next print time are close to reference values.
2. The inkjet recording device according to claim 1, further comprising: an input unit which can set input items for individually performing fine adjustment on the charging voltage, the deflecting voltage, and the ink pressure of the next print time; and a memory which stores contents input by the input unit, wherein setting values of the charging voltage, the deflecting voltage, and the ink pressure are changed according to the input contents.
3. The inkjet recording device according to claim 1, further comprising: an input unit which can select whether or not to perform a control method of automatically correcting setting values of the charging voltage, the deflecting voltage, and the ink pressure of the next print time of each of the nozzles; an input unit which can select a method for setting the reference values; and a memory which stores input contents, wherein the setting values of the charging voltage, the deflecting voltage, and the ink pressure of the next print time of each of the nozzles are automatically corrected according to the method selected in the setting.
4. The inkjet recording device according to claim 3, wherein in the input unit which can select the method for setting the reference values, a first method of performing test print in advance and using setting values at this time as the reference values and a second method of designating a nozzle with reference values in advance and using print setting values of the previous time as the reference values can be selected.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) FIG. 1A illustrates an outer appearance perspective diagram of an inkjet recording device having twin nozzles according to the present invention.
(2) FIG. 1B illustrates a control block diagram of the inkjet recording device of FIG. 1A.
(3) FIG. 1C illustrates a configuration diagram explaining a print operation in a case where the twin nozzles of the inkjet recording device are arranged in the vertical direction.
(4) FIG. 1D illustrates a configuration diagram for explaining a print operation in a case where the twin nozzles of the inkjet recording device are arranged in the horizontal direction.
(5) FIG. 1E illustrates a configuration diagram for explaining a print operation in a case where the twin nozzles of the inkjet recording device are arranged in the vertical direction and two supply pumps are arranged.
(6) FIG. 2A illustrates a group of print elements which is regarded as an individual variation between nozzles.
(7) FIG. 2B illustrates a diagram for explaining a charging voltage in the group or print elements.
(8) FIG. 2C illustrates a diagram for explaining a deflecting voltage in the group of print elements.
(9) FIG. 3A illustrates a print adjustment screen at the time of setting print-setting-value fine adjustment of performing fine adjustment on setting values of a charging voltage, a deflecting voltage, and an ink pressure of the next print time of each of nozzles to DO NOT PERFORM.
(10) FIG. 3B illustrates a print adjustment screen at the time of setting print-setting-value fine adjustment of performing fine adjustment on setting values of a charging voltage, a deflecting voltage, and an ink pressure of the next print time of each of nozzles to PERFORM.
(11) FIG. 3C illustrates a print adjustment screen at the time of setting print-setting-value fine adjustment of performing fine adjustment on setting values of a charging voltage, a deflecting voltage, and an ink pressure of the next print time of each of nozzles to PERFORM.
(12) FIG. 4A illustrates setting value determination flowchart of a next print time.
(13) FIG. 4B illustrates a subflowchart of the setting value determination flowchart of the next print time.
(14) FIG. 5A illustrates a print adjustment screen at the time of setting print-setting-value fine adjustment of performing fine adjustment on the setting values of the charging voltage, the deflecting voltage, and the ink pressure of the next print time of each of nozzles to PERFORM and setting a feedback process to DO NOT PERFORM.
(15) FIG. 5B illustrates a print adjustment screen at the time of setting print-setting-value fine adjustment of performing fine adjustment on the setting values of the charging voltage, the deflecting voltage, and the ink pressure of the next print time of each of nozzles to PERFORM and setting a feedback process to PERFORM and at the time of displaying a reference value designating method.
(16) FIG. 5C illustrates a print adjustment screen at the time of setting print-setting-value fine adjustment of performing fine adjustment on the setting values of the charging voltage, the deflecting voltage, and the ink pressure of the next print time of each of nozzles to PERFORM and setting a feedback process to PERFORM and at the time of setting a reference value designating method to a pre-setting method.
(17) FIG. 5D illustrates a print adjustment screen at the time of setting print-setting-value fine adjustment of performing fine adjustment on the setting values of the charging voltage, the deflecting voltage, and the ink pressure of the next print time of each of nozzles to PERFORM and setting a feedback process to PERFORM and at the time of setting a reference value designating method to a designated nozzle following method.
(18) FIG. 6A illustrates a determination flowchart for the charging voltage, the deflecting voltage, and the ink pressure at the time of the feedback process.
(19) FIG. 6B illustrates an entire flowchart at the time of performing the feedback process.
MODE FOR CARRYING OUT THE INVENTION
(20) Hereinafter, embodiments of the present invention will be described with reference to the drawings. Herein, a case where a twin-nozzle-equipped inkjet recording device where two nozzles are disposed in a print head is used and one print content is printed by simultaneously manipulating these nozzles will be described.
(21) A configuration of an embodiment of the present invention is described with reference to FIGS. 1A to 1E.
(22) FIG. 1A illustrates an outer appearance perspective diagram of an inkjet recording device having twin nozzles, and FIG. 1B illustrates a system block diagram of an entire configuration of the inkjet recording device illustrated in FIG. 1A. In addition, FIG. 1C illustrates a configuration diagram explaining a print operation at the time of arranging the twin nozzles of the inkjet recording device in a vertical direction, FIG. 1D illustrates a configuration diagram explaining a print operation at the time of arranging the twin nozzles of the inkjet recording device in a horizontal direction, and FIG. 1E illustrates a configuration diagram explaining a print operation at the time of arranging the twin nozzles of the inkjet recording device in the vertical direction and arranging two supply pumps.
(23) In the outer appearance perspective diagram of the inkjet recording device of FIG. 1A, the inkjet recording device main body 1 is configured to include a print head 2 equipped with twin nozzles, a display device 3 disposed in an upper portion of a front surface of the device main body, and a conduit 4 delivering and recovering ink and the like to and from the device main body. The inkjet recording device has a configuration where a panel 3 is disposed in the inkjet recording device main body 1, a print head 2 is provided outside and the device main body 1 and the print head 2 are connected by the conduit 4.
(24) Next, a system block diagram of the entire configuration of the inkjet recording device illustrated in FIG. 1A is illustrated in FIG. 1B. In the inkjet recording device, an MPU which controls the entire inkjet recording device is connected to a RAM (random access memory) 6 which temporarily records data in the inkjet recording device, a ROM (read only memory) 7 which records programs and the like in advance, a display device 8 which displays information of print contents, or the like, a panel 10 which is connected to a panel IF (interface) 9 to input print information or to input print data for fine adjustment, a print material detection circuit 11 which is connected to a print material sensor 12 which detects a print material, a supply pump 15 which supplies ink, a recovery pump 16a for recovering ink from a first gutter 19a, a recovery pump 16b for recovering ink from a second gutter 19b, a pressure sensor 17a which measures a pressure of a pre stage of a nozzle , a pressure sensor 17b which measures a pressure of a pre-stage of a nozzle , APH (automatic phase) detection circuits 18a and 18b which detect a charge timing so as to charge ink particles with a charging electrode at a very appropriate timing, the first gutter 19a, the second gutter 19b, an excitation frequency generation circuit 20a which applies an excitation frequency to the nozzle in order to produce ink particles, an excitation frequency generation circuit 20b which applies an excitation frequency to the nozzle in order to produce ink particles, the nozzles and , character signal generation circuits 21a and 21b which generate character signals to be printed on the print material, charging electrodes 22a and 22b which charge the ink particles, deflecting voltage generation circuits 23a and 23b, which apply deflecting voltages to the deflecting electrodes, and the deflecting electrodes 24a and 24b, and the like via a bus 100 to control these components.
(25) The ROM 7 stores a program for controlling the inkjet recording device, and the MPU 5 controls each component based on the program. In addition, the panel 10 is configured in a touch panel manner, so that data can be input on a screen, and the input data are stored in the RAM 6.
(26) Next, print operations in the inkjet recording device when two nozzles and perform print on a print material 27 as a product located on a transport line 26 will be described with reference to FIG. 1C.
(27) FIG. 1C illustrates a configuration of an inkjet recording device where two nozzles and are arranged side by side in the vertical direction and a single ink supply pump and two recovery pumps are arranged.
(28) In the control of the print operation in FIG. 1C, at the time of ink supply from the ink container 25 to the nozzles, ink is supplied to the nozzle and the nozzle by the single supply pump 15; and at the time of ink recovery from the nozzles to the ink container 25, the ink of the nozzle and the ink of the nozzle are recovered by the recovery pump 16a, and the recovery pump 16b, respectively. In this case, it is assumed that an ink pressure loss at the time of ink supply to the nozzle and the nozzle is zero.
(29) First, a position of the print material 27 as a product is detected by the print material sensor 12. Next, when the ink supplied from the ink container 25 by the supply pump 15 passes through the respective nozzles and , the nozzles and are excited by the excitation frequency generation circuits 20a and 20b to form ink particles 28a and 28b, charging voltages are generated by the character signal generation circuits 21a and 21h according to print data on the RAM 6, and the ink particles are charged by the charging electrodes 22a and 22b. The charged ink particles 28a and 28b pass through the deflecting electrodes 24a and 24b applied with the deflecting voltages output from the deflecting voltage generation circuits 23a and 23b to be deflected, and the ink particles form print dots on the print material 27 as a product, so that printing is performed. Non-charged ink particles 28a and 28b are not used for printing but recovered through the gutters 19a and 19b by the recovery pumps 16a and 16b to be returned to the ink container 25.
(30) Herein, with respect to the ink pressure, the charging voltage, and the deflecting voltage used for producing the print data, the current values thereof can be easily acquired, and the current values can also be displayed on the display device 8. As the methods of acquiring the values, the ink pressure can be directly acquired from the pressure sensors 17a and 17b in real-time, and the deflecting voltage can be directly acquired from the deflecting voltage generation circuits 23a and 23b in real-time. With respect to the charging voltage, when printing is not performed, a charging voltage check operation is periodically performed, and during the check operation, the charging voltage can be acquired from the APH (automatic phase) detection circuits 18a and 18b connected to the gutters 19a and 19b not in real-time but indirectly.
(31) In addition, at the time of changing settings of the print data or various print conditions in the printing performing, the settings are changed by performing analysis by the MPU 5 using a program in the ROM 7 based on information acquired from an input unit such as the panel 10 or an external signal detection device 13 or data in the RAM 6. After the settings are changed, the changed values are stored in the RAM 6. After the settings are changed, the current settings are displayed on the display device 8 or the external signal detection device 1.
(32) Next, a print operation of an inkjet recording device where two nozzles and are arranged side by side in the horizontal direction and a single ink supply pump and two recovery pumps are arranged will be described with reference to FIG. 1D. FIG. 1D is a diagram illustrating a configuration of the inkjet recording device where the two nozzles and are arranged side by side in the horizontal direction and the single ink supply pump and the two recovery pumps are arranged. The control of the print operation of FIG. 1D is the same as that of FIG. 1C, and thus, the description thereof is omitted. However, since the nozzles are arranged side by side in the horizontal direction, characters in the horizontal direction can be simultaneously printed.
(33) Next, a print operation of an inkjet recording device where two nozzles and are arranged side by side in the vertical direction and two ink supply pumps and two recovery pumps are arranged will be described with reference to FIG. 1E. FIG. 1E illustrates a configuration of the inkjet recording device where the two nozzles and are arranged side by side in the vertical direction and the two ink supply pumps and the two ink recovery pumps are arranged. In the control of the print operation in FIG. 1E, at the time of ink supply from the ink container 25 to the nozzles, ink is supplied to the nozzle by the supply pump 15a, and ink is supplied to the nozzle by the supply pump 15b. At the time of ink recovery from the nozzles to the ink container 25, the ink of the nozzle is recovered by the recovery pump 16a, and the ink of the nozzle is recovered by the recovery pump 16b. In this case, since the ink supply passages for the nozzles and are different, the ink pressures at the time of supply also influence the print result.
(34) Next, a group of print elements as an individual variation between nozzles and a change in print result at the time when print elements are changed will be described with reference to FIGS. 2A to 2C.
(35) FIG. 2A illustrates a group of print elements. Among the print elements 29, a charging voltage 30 with which the ink particles are charged, a deflecting voltage 31 which is applied to the charged ink particles, an ink pressure 32 exist and influence the print result of the inkjet recording device.
(36) FIG. 2B illustrates an example of a change of the charging voltage. With respect to the charging voltage 30, in order to acquire a charging efficiency that is the maximum charge amount applied at the time of forming the ink particles 28a and 28b, the ink particles 28a and 28b are always charged with infinitesimal amounts, and the charge amounts of the gutters 19a and 19h are periodically measured in the state that the printing is not performed. At this time, the automatic phase maximum value at the time of measurement for every constant interval of the excitation frequency 33 is set to the charging voltage 30.
(37) Since the charging voltage directly influences the charging efficiency, as illustrated in FIG. 2B, in a case where the current voltage 30E becomes smaller than the reference value 30C of the charging voltage 30, charged amounts of the ink particles 28a and 28b become small, so that characters may not be formed. Therefore, the level of the reference value 30C is necessary.
(38) Next, FIG. 2C illustrates an example of a change in the deflecting voltage 31. The deflecting voltage 31 is a voltage value applied to the deflecting electrodes 24a and 24b, and the ink particles 28a and 28b are deflected when the ink particles pass through the deflecting electrodes 24a and 24b according to the charged amount. Therefore, if the deflecting voltage 31 is changed, the deflected amounts of the ink particles 28a and 28b having the same charged amounts as those in FIG. 2C are also changed within the deflecting electrodes 24a and 24b. Therefore, the landing positions 34 of the ink particles are changed.
(39) More specifically, when the deflecting voltage 31 is increased, the current value 31H becomes larger than the reference value 31C of the deflecting voltage 31, so that the landing interval 34H of the ink particles 28H is widened in landing. When the deflecting voltage 31 is decreased, the current value 31L becomes smaller than the reference value 31C, so that the landing interval 34L of the ink particles 28L is narrowed in landing. In FIG. 2C, the landing interval 34C of the ink particles corresponds to the case of the reference value 31C.
(40) In addition, the ink pressure 32 is a force for allowing the ink to be flowed from the ink container 25 toward the nozzles and and influences an ejecting speed of the ink particles when the ink particles 28 are ejected from the nozzles and . Therefore, if the ink pressure is changed, the size of the ink particles 28 is changed. More specifically, when the ink pressure 32 is increased, the nozzle ejecting speed of the ink particles 28 becomes high, so that the size of the ink particles 28 becomes small. When the ink pressure 32 is decreased, the nozzle ejecting speed of the ink particles 28 becomes low, so that the size of the ink particles 28 becomes large.
(41) In this manner, the print result is changed according to the change in a group of print elements 29. When printing is performed by the inkjet recording device equipped with the twin nozzles, the operations with respect to the group of print elements 29 of the two nozzles need to be considered. As an example thereof, the problem is solved by employing the above-described configuration.
(42) Next, the screen for inputting in the fine adjustment of the charging voltages, the deflecting voltages, and the ink pressures, and the setting values of the next print time of the nozzles will be described with reference to FIGS. 3A to 3C. Herein, the next printing indicates the case where printing is performed and the next printing is performed.
(43) FIG. 3A illustrates a print adjustment screen 35 in a case where the item print-setting-value fine adjustment 36 is set to DO NOT PERFORM. FIG. 3B illustrates a print adjustment screen 35A where the item print-setting-value fine adjustment 36 is set to PERFORM, fine adjustment of the charging value and the deflecting voltage of the nozzle is performed by inputting numeric values (points) corresponding to changed values, and similarly, fine adjustment of the charging voltage and the deflecting voltage of the nozzle is performed by numeric values. FIG. 3C illustrates a print adjustment screen 35B where the item print-setting-value fine adjustment 36 is set to PERFORM and fine adjustment of the charging voltages, the deflecting voltages, and the ink pressures of the nozzles and is performed by inputting numeric values.
(44) In FIG. 3A, if the item print-setting-value fine adjustment 36 is displayed in the print adjustment screen 35 and DO NOT PERFORM is set, as displayed in the screen 35, the other input items are not displayed. If the item is set to PERFORM, the print adjustment screen 35 is switched like FIG. 3B or FIG. 35C. The print adjustment screen. 35A illustrated in FIG. 3B illustrates the case where the ink pressure 32 is not regarded as an individual variation between nozzles as illustrated in FIG. 1C. With respect to the selection items 37A of the nozzle , only the charging voltage and the deflecting voltage can be changed, and similarly, with respect to the selection items 38A of the nozzle , only the charging voltage and the deflecting voltage can be changed, and the fine adjustment can be performed.
(45) In addition, FIG. 3C illustrates a screen 35B in a case where the ink pressure 32 regarded as an individual variation between nozzles as illustrated in FIG. 1E. In the nozzle , the charging voltage, the deflecting voltage, and the ink pressure of the selection items 37B can be changed. Similarly, in the nozzle , the charging voltage, the deflecting voltage, and the ink pressure of the selection items 38B can be changed. In addition, in the print adjustment screen, the to-be-changed object can be set to the nozzles and , and in the selection items 37A, 37B, 38A, and 38B, the fine adjustment direction and the fine adjustment amount from the current values can be input. Namely, when the input value is +, the value obtained by increasing from the current value by the input value is used for the next print time; and when the input value is , the value obtained by decreasing from the current value by the input value is used for the next print time. When the input value is 0, the current value is used for the next print time as it is.
(46) FIG. 3B illustrates that, with respect to the nozzle , the charging voltage of 10 and the deflecting voltage of +5 are input so as to be changed, and with respect to the nozzle , the input values thereof are 0 and is not changed. FIG. 3C illustrates that, with respect to the nozzle , the charging voltage of 10 and the deflecting voltage of +5 are input so as to be changed, and the ink pressure is not changed; and with respect to the nozzle , the charging voltage, the deflecting voltage, and the ink pressure are not changed. Herein, although the input numeric values (points) are set to numeric values corresponding to the voltage value and the pressure value, the numeric values themselves may be the voltage value or the pressure value.
(47) Next, the charging voltages, the deflecting voltages, and the ink pressures of the nozzles described in FIGS. 3B to 3C and the flowchart [X] and subflowchart [sX] of the set value determination at the next print time will be described with reference to FIGS. 4A and 4B. FIG. 4A is the flowchart [X] of the set value determination of at the next print time when the item print-setting-value fine adjustment is set to PERFORM on the print adjustment screen 35, and FIG. 4B is the subflowchart [sX] thereof.
(48) In the flowchart [X] of FIG. 4A, first, it is determined whether or not the inkjet recording device is in print operation (step X1). Next, in a case where the recording device is in print operation, it is determined whether or not print-setting-value fine adjustment is performed (step X2). If the result of determination is no in step X1 and step X2, the procedure is ended. In a case where the print-setting-value fine adjustment is performed (Yes), checking the charging voltage of the nozzle is performed (step X3), and checking the charging voltage of the nozzle is performed (step X4). Next, checking of the deflecting voltage of the nozzle is performed (step X5), and checking of the deflecting voltage of the nozzle is performed (step X6). In addition, checking the ink pressure of the nozzle is performed (step X7), and next, checking the ink pressure of the nozzle is performed (step X8).
(49) By the above-described steps, the charging voltages, the deflecting voltages, and the ink pressures of the nozzles and are checked, and fine adjustment is performed on the setting value of each item of the next print time by using the subflowchart [sX]. In addition, with respect to the order of the checking of the charging voltage, the checking of the deflecting voltage, and the checking of the ink pressure of the above-described nozzles, the checking may be started from any one of the items.
(50) In the subflowchart [sX] illustrated in FIG. 4B, first, when the print-setting-value fine adjustment illustrated in FIGS. 3B and 3C is set to PERFORM, it is determined whether the setting values of the charging voltage, the deflecting voltage, and the ink pressure of the selection items 37A, 38A, 37B, and 38B are zero (step sX1). Next, when the setting values are not zero, the current value of each of the setting contents such as the charging voltage is acquired (step sX2). The method of acquiring the current values is the same as described above. Next, it is determined whether the setting value is positive or negative (step sX3). In a case where the setting value is positive, the value obtained by performing plus (+) fine adjustment on the current value is used as the value of the next print time (step sX4). In addition, in a case where the setting value is negative, the value obtained by performing minus () fine adjustment on the current value is used as the value of the next print time (step sX5). After the process of step sX4 or step sX5, the result of fine adjustment of the charging voltage and the like is output (step sX6), and the procedure is ended. By the above-described flowchart, it is possible to perform the fine adjustment on the charging voltage, the deflecting voltage, and the ink pressure.
(51) Next, a feedback process of automatically correcting the setting values for fine adjustment of the charging voltage, the deflecting voltage, and the ink pressure of the next print time of each of the nozzles in the inkjet recording device will be described with reference to FIGS. 5A to 5D and FIGS. 6A and 6B. The feedback process denotes a function of automatically changing the setting values of the charging voltage, the deflecting voltage, and the ink pressure of the next print time according to designated reference values. The feedback process is used together with fine adjustment technique to obtain a better printing result.
(52) Herein, as the method of setting the reference values in the feedback process, two methods of (1) a pre-setting method of performing a test print in advance and setting the setting values thereof to the reference values and (2) a designated nozzle following method of designating a nozzle with reference values in advance and setting the print setting value of the previous time to the reference values will be described.
(53) FIGS. 5A to 5D illustrate print adjustment screens of setting whether or not to perform the feedback process. In FIG. 5A, a key or button of setting whether to set the item print-setting-value fine adjustment 36 to PERFORM or DO NOT PERFORM exists on a print adjustment screen 39. If the PERFORM is set, a key or button of setting whether to set the feedback process 40 to PERFORM or DO NOT PERFORM is displayed. FIG. 5A illustrates the state that the print-setting-value fine adjustment is set to PERFORM and the feedback process is set to DO NOT PERFORM.
(54) In addition, FIG. 5B illustrates a print adjustment screen 39A where, if the print-setting-value fine adjustment 36 is set to PERFORM and the feedback process 40 is set to PERFORM, the item reference value designating method is displayed on the resulting screen, the pre-setting method and the designated nozzle following method of the contents of the reference value designating method are displayed, and a screen of selecting whether to select the pre-setting method or the designated nozzle following method is displayed.
(55) In addition, FIG. 5C illustrates a print adjustment screen 39B in that state that, if the print-setting-value fine adjustment 36 is set to PERFORM, the feedback process 40 is set to PERFORM, and the reference value designating method 41 is set to the pre-setting method, keys or buttons of the test print 42 and the setting 43 are displayed. Every time when the button of the test print is pressed, the test print is performed by using the current print data. The test print is performed by finely changing the charging voltage, the deflecting voltage, and the ink pressure for every print.
(56) In addition, the button of the setting 43 sets the setting values of the charging voltage, the deflecting voltage, and the ink pressure at the time of performing the test print by the button of the test print 42 to the reference values in the next print time.
(57) In addition, FIG. 5D illustrates a print adjustment screen 39C in the state that, if the print-setting-value fine adjustment 36 is set to PERFORM, the feedback process 40 is set to PERFORM, and the reference value designating method 41 is set to the designated nozzle following method, a key or button of the nozzle 44 and a key or button of the nozzle 45 are displayed.
(58) The button of the nozzle 44 or the button of the nozzle 45 can designate the nozzle with the reference values of the charging voltage, the deflecting voltage, and the ink pressure, and the current values of the designated nozzle are set as the reference values in the next print time.
(59) Next, a determination flowchart. [Y] for the charging voltage, the deflecting voltage, and the ink pressure at the time of performing the feedback process and an entire flowchart [Z] at the time of performing the feedback process will be described with reference to FIGS. 6A and 6B.
(60) FIG. 6A illustrates the flowchart [Y]. In the flowchart [Y], first, it is determined by the feedback process whether the reference value designating method 41 is a pre-setting method or a designated nozzle following method (step Y1). Next, when the pre-setting method is set, it is determined whether the pressed button is the button of the test print 42 or the button of the setting 43 (step Y2). In a case where the button of the test print 42 is pressed, the test print is performed by the nozzles and (step Y3), the current values of the charging voltage, the deflecting voltage, and the ink pressure of each of the nozzles and are stored (step Y4), and the procedure is ended. In addition, in a case where the button of the setting 43 is pressed, the reference values of the charging voltage, the deflecting voltage, and the ink pressure of the nozzle are set to the values of the charging voltage, the deflecting voltage, and the ink pressure at the time of performing the to print when the button of the test print 42 is pressed (step Y5). In addition, similarly, the reference values of the charging voltage, the deflecting voltage, and the ink pressure of the nozzle are set to the values of the charging voltage, the deflecting voltage, and the ink pressure at the time of performing the test print when the button of the test print 42 is pressed (step Y6), and the procedure is ended.
(61) Next, when the designated nozzle following method is set to the reference value designating method 41, it is determined whether the button of the nozzle 44 or the button of the nozzle 45 is pressed (step Y7). In a case where the button of the nozzle 44 is pressed, the reference values of the charging voltage, the deflecting voltage, and the ink pressure of the nozzle are set to the current values of the nozzle (step Y8). In a case where the button of the nozzle 45 is pressed, the reference values of the charging voltage, the deflecting voltage, and the ink pressure of the nozzle are set to the current values of the nozzle (step Y9), and the procedure is ended.
(62) Next, in the entire flowchart [Z] of the feedback process illustrated in FIG. 6B, first, it is determined whether or not the inkjet recording device is in print operation (step Z1). Next, if the recording device is in print operation, it is determined whether or not the print-setting-value fine adjustment is performed (step Z2). If the print-setting-value fine adjustment is selected to be performed, it is determined whether or not the feedback process is performed (step Z3). In addition, if the recording device is not in print operation, the procedure is ended. If the print-setting-value fine adjustment is selected not to be performed, the procedure is ended. If the feedback process is determined to performed, the feedback process is performed (step [Y]), after that, the fine adjustment process is performed (step [X]), and the procedure is ended. If the feedback process is determined not to be performed, the fine adjustment process of step [X] is performed, and the procedure is ended.
(63) In the above-described embodied configurations, particularly, the inkjet recording device equipped with the twin nozzles is described. However, in an inkjet recording device equipped with multi-nozzles including three or more nozzles, since print elements individually exist for every nozzle, the present invention can be applied to be effective. In addition, similarly, even though the nozzles are arranged in any one of the vertical direction, the horizontal direction, and a slanted direction, since the arrangement direction does not influence the print elements, the present invention is effective.
(64) Heretofore, the present invention can obtain an effect of sustaining print quality without depending on the number of nozzle and arrangement positions of the nozzles, and the present invention is not limited to the all configurations described above.
REFERENCE SIGNS LIST
(65) 1 Inkjet recording device main body 2 Print head 3, 8 Display device 4 Conduit 5 MPU 6 RAM 7 ROM 9 Panel interface 10 Panel 11 Print material detection circuit 12 Print material sensor 13 External signal detection circuit 14 Electromagnetic valve 15 Supply pump 16a, 16b Recovery pump 17a, 17b Pressure sensor 18a, 18b APH (automatic phase) detection circuit 19a, 19b Gutter 20a, 20b Excitation frequency generation circuit , Nozzle 21a, 21b Character signal generation circuit 22a, 22b Charging electrode 23a, 23h Deflecting voltage generation circuit 24, 24a, 24b Deflecting electrode 100 Bus 25 Ink container 26 Transport line 27 Print material (product) 28a, 28b Ink particles 29 Group of print elements 30 Charging voltage 31 Deflecting voltage 32 Ink pressure 33 Excitation frequency 34 ink particles landing interval 35, 39 Print adjustment screen 36 Item print-setting-value fine adjustment 37 Setting inputting portion of nozzle 38 Setting inputting portion of nozzle 40 Item feedback process 41 Item reference value designating method 42 Button test print 43 Button setting 44 Button nozzle 45 Button nozzle
