JP6814757B2 - Inkjet recording device and recovery method of inkjet recording device - Google Patents

Description

The present invention relates to an inkjet recording device that ejects ink onto a conveyed recording medium to perform recording, and a recovery method for the inkjet recording device.

Some inks used for recording use water as a solvent, and when exposed to air, the solvent water evaporates, causing an increase in the viscosity (thickening) of the ink. When the ink in the ejection port of the recording head becomes thick, the amount of ink ejected during the recording operation decreases and the ejection speed decreases, resulting in deterioration of image quality. For this reason, in the conventional inkjet recording device, a capping mechanism that covers the ejection port is provided to cover the ejection port when recording is stopped, thereby preventing thickening of the ink in the ejection port. In addition, an ink ejection process (preliminary ejection) is performed for ejecting thickened ink or ink mixed with dust from the ejection port. Since recording on a recording medium cannot be performed during the preliminary discharge, the productivity decreases as the number of preliminary discharges increases, so that the preliminary discharge is preferably performed to the minimum.

However, although the degree of thickening of the ink in the ejection port varies depending on the operating state of the apparatus, there is a concern that the productivity may decrease because the preliminary ejection is uniformly performed.

Therefore, Patent Document 1 proposes to perform preliminary discharge according to the time when the discharge port is exposed to the atmosphere.

Japanese Unexamined Patent Publication No. 2004-160803

However, even when the discharge port is exposed to the atmosphere, the ink in the discharge port may easily evaporate or may not easily evaporate, and as in Patent Document 1, reserves are made according to the time when the discharge port is exposed to the atmosphere. Even with the discharge, there was still concern about a decrease in productivity.

Therefore, an object of the present invention is to provide an inkjet recording device and a recovery method for the inkjet recording device, which can suppress a decrease in productivity.

In the inkjet recording apparatus of the present invention, a recording means for ejecting ink from an ejection port to record on a recording medium, a conveying means for conveying the recording medium, and a capping in which the ejection port is covered with a cap. A capping means capable of switching between a state and an exposure state in which the ejection port is exposed to the atmosphere, a recovery means for performing a recovery process for recovering the ink ejection performance of the recording means, and the exposure. A control means that controls the recovery means to execute the recovery process when the state exceeds a predetermined time, a facing time that the recording means faces the recording medium during the recording operation, and a recording medium during the recording operation. It is characterized by having a setting means for setting the predetermined time based on the non-opposite time.

According to the present invention, it is possible to realize an inkjet recording device and a recovery method for the inkjet recording device, which can suppress a decrease in productivity.

It is a figure which showed the recording system which connected the card printer and the host computer. It is a block diagram which shows the configuration example of the control hardware of a recording apparatus. It is a side view which showed the recording apparatus during a recording operation. It is a figure which showed the capping operation by a recording head and a capping mechanism. It is a figure which showed the discharge port of a recording head, and the ink which is ejected from a discharge port. It is a flowchart which showed the recording process. It is a graph which showed the relationship between the ratio of the facing time and the non-facing time between the recording head and the recording medium, and the allowable exposure time. It is a flowchart which showed the recording process, and the table which showed the recovery mode corresponding to the transport interval setting. It is a flowchart which showed the recording process, and the table which showed the level of the preliminary discharge on a sheet, and the coefficient.

(First Embodiment)
Hereinafter, the first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a recording system in which an inkjet card printer (hereinafter, also referred to as a recording device) 100 and a host computer (hereinafter, also referred to as a host) 101 in the present embodiment are connected. The recording device 100 is connected to the host computer 101 as an information processing device by the printer cable 102. The host 101 outputs image data, information about the recording medium, and the like as control commands to the recording device 100 via the printer cable 102. The recording medium P is loaded on the feeding tray 103, is fed in order from the recording medium located at the highest position, and is recorded by the recording head 110. The transport unit 104 that transports the recording medium is provided with a transport motor 105, a transport belt 106, and an suction fan (negative pressure generating means) 107.

The transport belt 106 is bridged between the guide rollers 108A and 108B and the drive roller 108C. When the drive roller 108C is rotated by the transfer motor 105, the transfer belt 106 that supports the recording medium P moves in the direction of arrow A1. Negative pressure is generated by the rotation of the suction fan 107, and air is sucked from a plurality of suction holes (not shown) formed in the transport belt 106 and discharged from the exhaust port of the transport unit 104. The transfer belt 106 conveys the recording medium P on the surface of the transfer belt 106 in the arrow A1 direction (first direction) by sucking air from the suction holes.

The recording device 100 includes a recording unit, and the recording unit is detachably mounted with an inkjet recording head 110 capable of recording an image on a recording medium. The recording head 110 ejects ink by using an ejection energy generating element such as an electric heat conversion element (heater) or a piezo element. When an electric heat conversion element is used, the ink is foamed by the heat generated, and the ink is discharged from the ejection port formed in the recording head 110 by utilizing the foaming energy. The plurality of discharge ports in the recording head 110 are arranged so as to form at least one row of discharge ports extending in a direction orthogonal to the transport direction of the recording medium P. The recording head 110 in the present embodiment is a full-line type inkjet recording head, and has a discharge port row having a length corresponding to the maximum width of the recording area of the recording medium P.

The recording unit is provided with a capping mechanism corresponding to the recording head 110 that receives the ink ejected by the preliminary ejection that ejects the ink that does not contribute to the recording prior to the recording operation. The recording device 100 is provided with a tip detection sensor 111 that detects the tip of the recording medium P in order to obtain recording timing. The tip detection sensor 111 is configured to include either or both of a reflective sensor and a transmissive sensor. For example, when the recording medium is a label, the tip of the label as a unit area is detected by the difference in reflectance between the sheet (separator) to which the label is attached and the label attached to the separator. The rotating shaft of the guide roller 108A is provided with an encoder (not shown) that rotates in synchronization with the rotating shaft, and functions as a detecting means for detecting the transport position of the recording medium P. It is managed by the CPU described later based on the transfer of the recording medium P by the transfer unit 104, the recording timing by the recording head 110, and the detection signal of the encoder. The recording medium P on which the recording is performed is discharged to the discharge tray 501.

FIG. 2 is a block diagram showing a configuration example of the control hardware of the recording device 100 according to the present embodiment. The control unit 200 of the recording device 100 includes a central processing unit (CPU) 201 and executes a control program stored in the non-volatile memory (ROM) 202 to control each component of the recording device 100. Further, the control unit 200 includes a memory (RAM) 203 used as a work area for various data processing and a reception buffer, and an image memory 204 as an image development unit.

The control circuit 210 of the control unit 200 includes a drive circuit 205 for driving the recording head 110, a motor driver 207, a sensor 208, and the like. The motor driver 207 is a driver for various motors 206 that control the cleaning operation and the recording operation of the recording head. The sensor 208 is used for controlling various operations in the recording device 100, detecting the presence / absence of the recording medium P, and the like. The control unit 200 is connected to the host 101 via USB 209.

The recording command transmitted from the host 101 of the present embodiment to the recording device 100 via the printer cable 102 will be described. The recording command is notified of a recording medium setting command for notifying the size of the recording medium P, a format command for specifying the recording area, a transport speed setting command for specifying the transport speed of the recording medium P, and image data of the recorded image. There is a data command.

The number of drawing colors is stored in the drawing color command, and one or more data are stored in the image data command according to the number of drawing colors. When the drawing color is only K (black), one image data is stored, and when the drawing color is K (black), C (cyan), M (magenta), Y (yellow), Four image data are stored in order.

FIG. 3 is a side view showing the recording device 100 during the recording operation. Hereinafter, the recording operation in the inkjet recording apparatus 100 will be described. The recording medium P to be recorded is mounted on the transfer belt 106 and conveyed, and is attracted to the transfer belt 106 by the suction force of the suction fan 107 on the transfer belt 106. The recording medium P is transported on the transport belt 106 at predetermined intervals, and after the tip passes under the tip detection sensor 111 and is detected, the encoder (not shown) rotates in synchronization with the rotation axis of the guide roller 108A. Detects the transport position of the recording medium P. During the recording operation, the recording medium is conveyed in the direction of arrow A1 and ink is applied from the recording unit 110 to record on the recording medium.

4 (a) to 4 (c) are views showing a capping operation by the recording head 110 and the capping mechanism 402. The discharge port surface of the recording head 110 provided with the discharge port 401 is covered with a capping mechanism 402 as shown in FIG. 4A in order to prevent water evaporation from the ink in the discharge port during recording standby. However, since ink is ejected from the ejection port 401 to the recording medium during the recording operation, the recording head 110 is separated from the capping mechanism 402 and the capping mechanism 402 retracts as shown in FIG. 4B. After that, as shown in FIG. 4C, the recording head 110 descends to the recording position and performs a recording operation. In this way, while the capping mechanism 402 is separated from the recording head 110, the discharge port is exposed to the atmosphere, and moisture evaporates from the ink in the discharge port.

5 (a) and 5 (b) are views showing the discharge port 401 of the recording head 110 and the ink discharged from the discharge port 401. In a state where a predetermined amount of ink is ejected by the recording operation, the ink can be ejected by ejecting the ink in the ejection port where the water has evaporated by being exposed to the atmosphere (see FIG. 5A). However, when the amount of ink discharged in the recording operation is small (the discharge speed is low), the ink in which the water has evaporated cannot be sufficiently discharged, and the ink near the discharge port is as shown in FIG. 5 (b). The viscosity of the ink increases. Therefore, when the amount of ink discharged during the recording operation is small, pre-discharge is performed to discharge ink that does not contribute to recording, and the ink with evaporated water is discharged from the discharge port to refresh the ink. Is maintained in good condition. Such pre-discharge is performed on the capping mechanism 402 as a recovery operation (recovery process) for maintaining the discharge performance in a good state, or is performed so as to be difficult to see in the image forming region on the paper surface. It is carried out outside the image forming region on the recording medium, or a combination thereof.

Further, although it has been explained that the water content evaporates from the ink in the discharge port when the discharge port of the recording head 110 is not covered by the capping mechanism 402, the water content evaporates even when the discharge port is not covered by the capping mechanism 402. There is a state where it is easy to evaporate and a state where it is difficult for water to evaporate. Hereinafter, a state in which water is likely to evaporate from the ink in the ejection port and a state in which water is difficult to evaporate will be described.

As described with reference to FIGS. 1 and 3, the recording medium is mounted on the transfer belt 106 and conveyed, and at that time, the recording medium is conveyed by the suction force of the suction fan 107 provided at the lower part of the transfer belt 106. Is adsorbed on. Further, the recording medium is conveyed on the conveying belt 106 at a predetermined interval. Since there is no recording medium between the conveyed recording medium and the recording medium, the air is drawn from the upper surface (recording medium mounting surface) to the lower surface of the transfer belt 106 by suction of air from the suction hole by the suction fan 107. A flow occurs.

During the recording operation, the recording head 110 is arranged so that the discharge port faces the recording medium. There is no recording medium between the recording medium and the recording medium until the recording on the recording medium by the recording head 110 is completed and the recording medium faces the next recording medium (the ejection port and the recording medium do not face each other). There is an area. In the region where the discharge port and the recording medium do not face each other, as described above, an air flow from the upper surface to the lower surface is generated through the suction hole of the transport belt 106. This air flow also causes an air flow in the vicinity of the discharge port, and promotes the evaporation of water from the ink in the discharge port. When the discharge port and the recording medium face each other, the suction holes are closed by the recording medium, and the suction force of the suction fan 107 does not cause an air flow from the upper surface to the lower surface of the transport belt 106. Therefore, the evaporation of water from the ink in the ejection port is not promoted.

As described above, the amount of water evaporated in the ink in the ejection port differs between the state in which the ejection port of the recording head 110 faces the recording medium and the state in which the ejection port does not face the recording medium. That is, when the ejection port and the recording medium face each other, the water content of the ink does not easily evaporate, and when the ejection port and the recording medium do not face each other, the water content of the ink tends to evaporate.

Therefore, in the present embodiment, attention is paid to the difference in the amount of water evaporation in the ink in the ejection port. That is, in the recording operation, the allowable exposure time is set according to the time when the discharge port and the recording medium face each other and the time when the discharge port and the recording medium do not face each other, and the exposure time exceeds the allowable exposure time. If so, perform a recovery operation (preliminary discharge). The specific method will be described below.

FIG. 6 is a flowchart showing the recording process in the present embodiment. Hereinafter, the recording process of the present embodiment will be described with reference to this flowchart. When the recording process is started, in step S601, the CPU 201 of the recording device 100 receives a recording command from the host 101, and in step S602, receives the recorded data. After that, in step S603, the CPU 201 determines the time during which the recording medium is conveyed and the time between the recording medium and the recording medium (between the recording media) based on the size data of the recording medium and the transfer speed information in the received recording data. Calculate the ratio of time. The time between the recording media is calculated from the transport speed information and the distance between the recording media peculiar to the apparatus. Then, in step S604, the CPU 201 sets an allowable exposure time (time when the ejection port is not covered by the capping mechanism), which is a range of exposure time during which the recording head 110 can normally eject ink droplets based on this ratio. Then, the recording operation is started in step S605.

When the recording operation is started, in step S606, the CPU 201 starts measuring the exposure time from the timing when the recording head 110 and the capping mechanism 402 are separated from each other. Then, in step S607, it is determined whether or not the exposure time, which is the elapsed time from the start of the exposure time measurement, exceeds the allowable exposure time. If the permissible exposure time is exceeded, the process proceeds to step S609, and as a recovery operation for discharging the ink whose viscosity has increased due to the exposure, the recording head 110 and the capping mechanism 402 are opposed to each other in the cap for ejecting ink droplets. Perform pre-discharge. Then, in step S610, the exposure time is reset and the process returns to step S606. The recovery operation performed in step S609 may be performed after the recording operation on the recording medium being recorded is completed and before the recording operation on the next single recording medium is started.

In step S607, if the exposure time does not exceed the permissible exposure time, the CPU 201 proceeds to step S608, determines whether the recording job has ended, and if not, returns to step S607 and returns to all recording jobs. If is finished, the recording process is finished.

FIG. 7A shows a facing time ratio, which is a ratio between the time when the recording medium faces the discharge port (opposing time) and the time when the recording medium does not face the discharging port (non-facing time) in the present embodiment. It is a graph which showed the relationship with the permissible exposure time. The slope of the line in this graph depends on the configuration of the device that affects the dry state of the ink in the ejection port. Using this graph, in step S604 of FIG. 6, the allowable exposure time is set from the calculated facing time ratio.

The allowable exposure time may be set from the facing time and the non-facing time by using a reference table or a calculation formula instead of the graph.

Here, the allowable exposure time will be described with reference to a specific example.
The facing time is the time during which the recording medium passes through the position facing the discharge port of the predetermined recording head. In the non-opposing time, after the rear end of the preceding recording medium passes the position facing the discharge port of the predetermined recording head, the tip of the succeeding recording medium reaches the position facing the discharge port of the same recording head. It is time to. This is due to the interval at which the recording medium is fed from the feed tray 103.

As shown in FIG. 7B, when a business card having a transport speed of 160 mm / s and a dimension of 55 mm in the transport direction, which is a recording medium, is transported, the facing time is 0.34 s, which is the non-facing time. The interval (between business cards) is 0.42 s depending on the feeding interval of the recording medium from the feeding tray 103.

Next, the ratio of the facing time to the non-opposing time (opposing time ratio) is (0.34s / 0.42s). Referring to FIG. 7A, when the facing time ratio is 1: 1, the allowable exposure time is 51s. Therefore, in the case of the above example, the allowable exposure time is calculated as follows.
Allowable exposure time (s) = 51s x (0.34s / 0.42s) = 41s
In this way, the permissible exposure time can be obtained.

Since the effect of the amount of evaporation of water on the ejection performance differs depending on the type of ink used for recording, such as dye ink or pigment ink, it is desirable to change the slope of the graph according to the type of ink used for recording. ..

In addition, since the amount of water evaporated from the ink varies depending on the environmental conditions such as temperature and humidity during the recording operation, the reference value of the allowable exposure time, that is, the facing time, is determined according to the environmental conditions such as the temperature and humidity during the recording operation. It is preferable to set the allowable exposure time when the non-opposite time ratio is 1: 1.

In addition, since the properties of the ink receiving layer on the surface differ depending on the type of recording medium, the amount of water evaporated from the ink ejected to the recording medium differs, and the humidity near the ejection port also differs. Therefore, depending on the type of recording medium, It is preferable to set the allowable exposure time.

Further, since the hardness differs depending on the type of recording medium, the suction force by the suction fan may be changed according to the hardness. In that case, the air flow in the region where the recording head and the recording medium do not face each other differs depending on the type of the recording medium. Therefore, it is preferable to set the reference value of the allowable exposure time in consideration of the suction force by the suction fan according to the type of the recording medium.

Further, in the present embodiment, the ratio of the time during which the recording medium is conveyed and the time between the recording medium and the recording medium is calculated from the size data of the recording medium and the transfer speed information in the received recording data. However, it is not limited to this. From the detection result by the detection means for detecting the recording medium, the time during which the recording medium is conveyed and the time between the recording medium and the recording medium may be obtained and set as the facing time and the non-facing time.

Further, in this embodiment, the case where the preliminary ejection is performed as the recovery operation has been described, but the recovery operation is not limited to this, and the wiping operation for wiping the ejection port and the suction operation for sucking ink from the ejection port are performed. It is also possible to apply it to other operations that restore discharge performance.

Further, it is possible to apply this embodiment regardless of whether the facing time or the non-facing time changes. That is, when the non-opposite time is constant, the timing of the recovery operation may be set when the size of the recording medium changes, and when the size of the recording medium is constant, the recovery operation may be set when the non-opposite time changes. The timing of is set.

The size of the recording medium may be changed by the user, and the non-opposite time may be changed by the setting change by the user or the waiting time when the temperature of the recording head 110 rises.

As described above, by setting the timing for executing the recovery operation, it was possible to realize a recovery method for the inkjet recording device and the inkjet recording device, which can suppress a decrease in productivity.

(Second Embodiment)
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. Since the basic configuration of this embodiment is the same as that of the first embodiment, only the characteristic configuration will be described below. In the present embodiment, the CPU 201 changes the recovery timing when the interval between the preceding recording medium and the succeeding recording medium is changed by the user's setting.

FIG. 8 is a flowchart showing the recording process in the present embodiment. Since the basic control flow is the same as the flowchart of FIG. 6, different parts will be described here.

In step S802, the CPU 201 receives the transfer interval mode setting from the host 101. This setting is set by the user on the host 101 with respect to the interval between the preceding and succeeding recording media that are continuously conveyed.

Next, the CPU 201 sets the recovery mode in step S803. The CPU 201 confirms the setting contents of the transport interval mode received in step S802, and sets the interval of the recovery operation, that is, the allowable exposure time. Specifically, as shown in FIG. 8B, it is possible to set two modes, "standard" and "long", for the transport interval of the recording medium. The CPU 201 sets the permissible exposure time to a predetermined value of "standard" (for example, 50 seconds) when the transport interval mode of the recording medium is "standard" (step S804). When the transport interval mode is set to "long", the CPU 201 sets the allowable exposure time to be shorter than the "standard" (for example, 40 seconds) (step S805).

Here, the permissible exposure time for the "standard" and "short" recovery modes is appropriately set according to the type of ink used and the configuration of the device.

After that, the CPU 201 performs a recording operation based on the received recorded data, and also executes a recovery operation according to the set allowable exposure time.

In the present embodiment, the setting of the transport interval mode of the recording medium is selected from two, "standard" and "long", but may be selected from three or more. In that case, the permissible exposure time may be set shorter for the recording medium having a longer transport interval.

Further, in the present embodiment, the case where the transport interval of the recording medium is set by the user has been described, but the transport time of the recording medium changes due to other factors such as the temperature rise of the recording head 110 during the recording operation. The CPU 201 may change the recovery mode according to the above.

(Third Embodiment)
Hereinafter, a third embodiment of the present invention will be described with reference to the drawings. Since the basic configuration of this embodiment is the same as that of the first embodiment, only the characteristic configuration will be described below.

As a type of preliminary ejection, there is preliminary ejection on a sheet in which ink is ejected so as to be difficult to see in the image forming region on the recording medium. Preliminary ejection on the sheet ejects ink droplets that are not included in the recording data to the inside or outside the image forming region on the recording medium so that it is difficult to see, and alleviates the thickening of the ink inside the ejection port. It is done to do. When pre-discharging on the sheet, the shorter the ejection interval of the pre-discharge on the sheet, the higher the effect of alleviating the thickening of the ink inside the ejection port. Therefore, in the present embodiment, attention is paid to this point, and in the recording operation involving the preliminary ejection on the sheet, the exposure is based on the ejection interval of the preliminary ejection on the sheet and the time when the recording head and the recording medium face each other and the time when the recording medium does not face each other. Set the timing for recovery.

In the present embodiment, the level of pre-discharge on the sheet can be selected from three stages, and the higher the level, the shorter the interval of pre-discharge on the sheet at each discharge port. The higher the level of preliminary ejection on the sheet, the higher the effect of alleviating the thickening of the ink inside the ejection port, and the higher the humidity in the vicinity of the recording head due to the moisture evaporating from the ink droplets ejected on the recording medium. The exposure time can be set longer. Therefore, the higher the level of pre-discharge on the sheet, the larger the coefficient to be multiplied by the allowable exposure time. The specific method will be described below.

FIG. 9A is a flowchart showing the recording process in the present embodiment, and FIG. 9B is a table showing the level of preliminary discharge on the sheet and its coefficient. Hereinafter, the recording process of the present embodiment will be described with reference to the flowchart of FIG. 9A and the table of FIG. 9B. The same processing as that of the first embodiment (in the flowchart of FIG. 6) will be omitted. Step S902, step S903, and step S906 are different between the recording process in the first embodiment and the recording process in the present embodiment. After receiving the recording command in step S901, the CPU 201 acquires the level of preliminary discharge on the sheet as the preliminary discharge setting on the sheet in step S902. Then, in step S903, the allowable exposure time coefficient is set from the acquired level of preliminary discharge on the sheet based on the table of FIG. 9B. Then, in step S906, the allowable exposure time is specified from the transport time ratio, and the specified allowable exposure time multiplied by the allowable exposure time coefficient set in step S903 is set as the allowable exposure time.

In this way, the CPU 201 sets the timing for executing the recovery operation according to the facing time and non-facing time between the recording means and the recording medium and the level of the preliminary discharge on the sheet. As a result, it was possible to realize an inkjet recording device and a recovery method for the inkjet recording device, which can further suppress a decrease in productivity.

(Other embodiments)
Hereinafter, other embodiments of the present invention will be described with reference to the drawings. Since the basic configuration of this embodiment is the same as that of the first embodiment, only the characteristic configuration will be described below.

Preliminary discharge on the sheet can be performed when the discharge port and the recording medium face each other, but cannot be performed unless the discharge port faces the recording medium. Therefore, when the transport unit 104 of FIG. 3 transports the recording medium P, the paper surface reserve is provided in a state where the discharge port of the recording head 110 faces the recording medium P and a state in which the discharge port does not face the recording medium P. The amount of water evaporated in the ink in the ejection port differs depending on the ejection level.

For this reason, the transport unit 104 as the transport means only needs to be able to transport the single-wafer recording medium, and is not necessarily specified only in a configuration in which the recording medium is attracted to the transport belt 106 by the suction fan 107 and transported.

It is also applicable to a state in which a plurality of labels, which are recording media, are attached to continuous sheets (separators). In this case, the timing for performing the recovery operation is based on the time when the recording head and the label face each other and the time when the recording head and the label do not face each other (the time when the recording head and the separator face each other). To set.

100 Inkjet recording device 101 Host computer 106 Conveyance belt 107 Suction fan 110 Recording head 401 Discharge port 402 Capping mechanism

Claims (10)

A recording means that ejects ink from the ejection port and records on a recording medium,
The transport means for transporting the recording medium and
A capping means capable of switching between a capping state in which the discharge port is covered with a cap and an exposure state in which the discharge port is exposed to the atmosphere.
A recovery means for performing a recovery process for recovering the ink ejection performance of the recording means, and
A control means that controls the recovery means to perform the recovery process when the exposure state exceeds a predetermined time.
A setting means for setting the predetermined time based on the facing time when the recording means faces the recording medium during the recording operation and the non-facing time when the recording means does not face the recording medium during the recording operation.
An inkjet recording device characterized by having. The inkjet recording apparatus according to claim 1, wherein the transport means transports the recording medium while sucking the recording medium with the negative pressure generated by the negative pressure generating means. The inkjet recording apparatus according to claim 1 or 2 , wherein the setting means acquires the facing time based on the transport speed of the transport means and the dimensions of the recording medium in the transport direction. .. Further having a detection means for detecting the presence or absence of a recording medium,
The inkjet recording apparatus according to any one of claims 1 to 3, wherein the setting means acquires the facing time based on the detection result of the detection means. The inkjet recording apparatus according to any one of claims 1 to 4 , wherein the recovery process performed by the recovery means is a preliminary ejection in which the recording means ejects ink that does not contribute to recording. .. The inkjet recording apparatus according to any one of claims 1 to 5 , wherein the setting means sets the predetermined time based on the type of ink used for recording. The inkjet recording apparatus according to any one of claims 1 to 6 , wherein the setting means sets the predetermined time based on the environmental conditions during the recording operation. The inkjet recording apparatus according to any one of claims 1 to 7 , wherein the setting means sets the predetermined time based on the type of recording medium for recording. The inkjet recording apparatus according to claim 2 , wherein the setting means sets the predetermined time based on the magnitude of the negative pressure generated by the negative pressure generating means. The recording process in which the recording means ejects ink to the recording medium,
A recovery step of performing a recovery process for recovering the ink ejection performance of the recording means when the time when the recording means is exposed to the atmosphere exceeds a predetermined time.
In the recording step, a setting step of setting the predetermined time based on the facing time when the recording means faces the recording medium and the non-facing time when the recording means does not face the recording medium.
A recovery method for an inkjet recorder, characterized in that it comprises.

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