JP2024175726A - Image forming system, printing abnormality avoiding method and program - Google Patents

Abstract

An image forming system, a method for avoiding a printing abnormality, and a program are provided that are capable of continuing printing while reducing the probability of the occurrence of a printing abnormality.
[Solution] The system includes an image forming unit 14 that prints an image on paper, a memory control unit (control unit 16) that stores the printing conditions at the time of the printing abnormality in a memory unit 17 when a printing abnormality occurs due to printing by the image forming unit 14, a comparison unit (control unit 16) that compares the printing conditions of the print job with the printing conditions at the time of the printing abnormality stored in the memory unit 17 before printing of the print job, and a determination unit (control unit 16) that determines whether the occurrence of the printing abnormality can be avoided by changing the printing rate of the print job when the printing conditions of the print job match as a result of the comparison by the comparison unit.
[Selected figure] Figure 2

Description

The present invention relates to an image forming system, a method for avoiding printing abnormalities, and a program.

Image forming devices that print (form) images on paper are known. When an image forming device prints an image on paper, printing abnormalities such as stains, streaks, glowing spots, color unevenness, and jams may occur.

A configuration has been disclosed in which printing conditions when a printing abnormality occurs are stored and compared with the stored printing conditions when a printing abnormality occurs before printing (see, for example, Patent Document 1). Printing conditions include, for example, the model, paper type, basis weight, paper size, print rate, temperature and humidity, and other information that can be acquired by sensors. The configuration described in Patent Document 1 prevents the occurrence of a printing abnormality by stopping printing in advance when the printing conditions match the printing conditions when a printing abnormality occurs.

JP 2021-30576 A

However, the configuration described in Patent Document 1 compares the printing conditions with the printing conditions during the printing abnormality, and if they match, stops printing. In other words, if the printing conditions match the printing conditions during the printing abnormality, there is a risk that printing will have to be abandoned.

The present invention aims to provide an image forming system, a method for avoiding printing abnormalities, and a program that can continue printing while reducing the probability of printing abnormalities occurring.

The invention described in claim 1 has been made to achieve the above object,
In an image forming system,
an image forming unit that prints an image on paper;
a memory control unit that, when a printing abnormality occurs during printing by the image forming unit, stores in a memory unit the printing conditions at the time of the printing abnormality;
a collation unit that collates a printing condition of the print job with the printing condition at the time of the printing abnormality stored in the storage unit before the print job is executed;
a determination unit that, when the printing conditions of the print job and the printing conditions at the time of the printing abnormality match as a result of the comparison by the comparison unit, determines whether the occurrence of the printing abnormality can be avoided by changing the printing rate of the print job;
The present invention is characterized by comprising:

The present invention relates to an image forming system comprising:
The printing job may further include a change unit that changes a printing rate of the print job so as not to cause the printing abnormality when the determination unit determines that the printing abnormality can be avoided.

The present invention relates to an image forming system according to claim 3,
The change unit changes the imposition of the print job so that the printing rate per sheet of paper is uniform.

The present invention relates to an image forming system comprising:
a cutting unit that cuts the paper on which the image is printed by the image forming unit,
The change unit changes the paper on which the image is printed by the image forming unit to paper having a paper size larger than the original paper, and causes the cutting unit to cut the changed paper so that it has the same paper size as the original paper.

The present invention relates to an image forming system comprising:
The change unit changes the print density of the print job.

According to a sixth aspect of the present invention, there is provided an image forming system according to the fifth aspect,
The image forming apparatus further includes a display control unit that displays a preview of the image whose print density has been changed by the change unit on a display unit.

According to a seventh aspect of the present invention, in the image forming system according to the fifth aspect,
The image forming apparatus further includes a print control unit that causes the image forming unit to print a sample of the image, the print density of which has been changed by the change unit, on the paper.

The invention described in claim 8 is
A method for avoiding a printing abnormality in an image forming system having an image forming unit that prints an image on a sheet, comprising:
a storage control step of storing, in a storage unit, printing conditions at the time of occurrence of a printing abnormality in a printing process performed by the image forming unit;
a comparison step of comparing, before printing of the print job, the print conditions of the print job with the print conditions at the time of the printing abnormality stored in the storage unit;
a determination step of determining whether or not the occurrence of the printing abnormality can be avoided by changing a printing rate of the print job when the printing conditions of the print job and the printing conditions at the time of the printing abnormality coincide as a result of the comparison in the comparison step;
Includes.

The invention described in claim 9 is
A computer of an image forming system including an image forming unit that prints an image on a sheet of paper,
a storage control unit that stores, in a storage unit, printing conditions at the time of occurrence of a printing abnormality in a printing process performed by the image forming unit;
a collation unit that collates, before printing of a print job, a printing condition of the print job with the printing condition at the time of the printing abnormality stored in the storage unit;
a determination unit that, when the printing conditions of the print job and the printing conditions at the time of the printing abnormality match as a result of the comparison by the comparison unit, determines whether the occurrence of the printing abnormality can be avoided by changing a printing rate of the print job;
This is a program that functions as a

According to the present invention, it is possible to continue printing while reducing the probability of print abnormalities occurring.

1 is a diagram showing a schematic configuration of an image forming system according to an embodiment of the present invention; FIG. 2 is a functional block diagram showing a control structure of the image forming system according to the embodiment. 5 is a flowchart showing an example of control of the image forming system according to the embodiment. FIG. 13 is a diagram showing an example of a printed sheet before imposition is changed; FIG. 13 is a diagram showing an example of a printed sheet after imposition has been changed; 11A and 11B are diagrams illustrating an example of the same image printed on the original paper before and after the paper size is changed. 11A and 11B are diagrams illustrating an example of a sheet on which images are printed before and after changing the print density.

The following describes in detail the embodiments of the present invention with reference to the drawings.

As shown in Figures 1 and 2, the image forming system 1 according to this embodiment includes an image forming device 10, an image reading device 20, and a cutting device 30.

The image forming device 10 prints (forms) an image on paper based on image data included in a print job received from an external device, etc. Alternatively, the image forming device 10 prints an image on paper based on image data obtained by reading an image from a document. The paper on which the image has been printed is discharged to the image reading device 20.

As shown in Figures 1 and 2, the image forming device 10 includes an operation unit 11, a display unit 12, a document reading unit 13, an image forming unit 14, a paper feed unit 15, a control unit 16, a memory unit 17, a controller IF 18, and an image processing unit 19.

The operation unit 11 includes a touch panel formed to cover the display screen of the display unit 12, as well as various operation buttons such as numeric buttons and a start button. The operation unit 11 outputs an operation signal based on a user's operation to the control unit 16.

The display unit 12 is composed of an LCD (Liquid Crystal Display). The display unit 12 displays various screens according to the instructions of a display signal input from the control unit 16.

The document reading unit 13 includes an ADF (automatic document feeder), a scanner, etc. The document reading unit 13 reads the image of the document and outputs the image data obtained to the control unit 16.

The image forming unit 14 forms (prints) an image on a sheet of paper supplied from the paper supply unit 15 based on the image data that has been image-processed by the image processing unit 19 .
The image forming unit 14 includes photoconductor drums 141Y, 141M, 141C, and 141K corresponding to the respective colors of yellow (Y), magenta (M), cyan (C), and black (K), an intermediate transfer belt 142, a secondary transfer roller 143, a fixing unit 144, and the like.

After being uniformly charged, the photoconductor drum 141Y is scanned and exposed by a laser beam based on yellow image data to form an electrostatic latent image, and then yellow toner is attached to the electrostatic latent image on the photoconductor drum 141Y to develop it.
The photoconductor drums 141M, 141C, and 141K are similar to the photoconductor drum 141Y except for the colors they handle, and therefore descriptions thereof will be omitted.

The toner images of each color formed on the photoconductor drums 141Y to 141K are successively transferred (primary transfer) onto the rotating intermediate transfer belt 142. That is, a color toner image is formed on the intermediate transfer belt 142 in which the toner images of the four colors are superimposed.
The color toner image on the intermediate transfer belt 142 is transferred all at once onto a sheet of paper by a secondary transfer roller 143 (secondary transfer).

The fixing unit 144 includes a heating roller that heats the paper onto which the color toner image has been transferred, and a pressure roller that pressurizes the paper. The fixing unit 144 fixes the color toner image to the paper by applying heat and pressure.

The paper feed unit 15 includes paper feed trays 151 to 153, and supplies paper to the image forming unit 14. Each of the paper feed trays 151 to 153 stores paper of a paper type and size that is predetermined for that paper feed tray.

The control unit 16 includes a CPU, a ROM, and a memory.
The CPU reads out various processing programs stored in the ROM, and performs centralized control of the operations of each part of the image forming apparatus 10 in accordance with the programs.
The ROM is configured from a non-volatile semiconductor memory or the like, and stores various processing programs, parameters and files required for executing the programs, and the like.
The memory is configured with a DRAM or the like, and temporarily stores various data such as programs and image data related to various image processes.

The storage unit 17 is a non-volatile storage device such as a HDD or semiconductor memory that stores various data such as programs and image data. The storage unit 17 stores data such as program data and various setting data in a manner that can be read and written by the control unit 16. For example, the storage unit 17 stores printing conditions when a printing abnormality occurs.

The controller IF (Interface) 18 receives print jobs sent from external devices, etc. The received print jobs are output to the control unit 16.

The image processing unit 19 performs the necessary image processing on the image data, and sends the image data after image processing to the image forming unit 14. Image processing includes gradation processing, halftone processing, color conversion processing, etc. Gradation processing is a process that converts the gradation value of each pixel of the image data into a corrected gradation value so that the density characteristics of the image formed on the paper match the target. Halftone processing is an error diffusion process, a screen process using an ordered dither method, etc. Color conversion processing is a process that converts each RGB gradation value into each CMYK gradation value.

The image reading device 20 is connected to the rear of the image forming device 10 and includes a control unit 21, an image reading unit 22, and an image processing unit 23.

The control unit 21 includes a CPU, ROM, RAM, etc., and provides overall control over the operation of each part of the image reading device 20.

The image reading unit 22 includes, for example, a linear image sensor (e.g., a CCD line sensor), an optical system, a light source, etc. The image reading unit 22 reads the paper on which an image has been formed by the image forming unit 14, and outputs the obtained read image to the image processing unit 23. The paper read by the image reading unit 22 is transported to the cutting device 30.

The image processing unit 23 performs various processes on the analog image data input from the image reading unit 22, and then generates RGB digital image data. The various processes include, for example, analog processing, A/D conversion processing, shading processing, etc. The image data generated by the image processing unit 23 is output to the control unit 16 of the image forming device 10.

The paper cutting device 30 includes a control unit 31, a transport unit 32, a cutting unit 33, a paper discharge unit 34, and a waste paper box 35. The paper cutting device 30 is provided with a paper discharge tray T1 for stacking the paper discharged by the paper discharge unit 34.

The control unit 31 includes a CPU, a ROM, a RAM, and the like, and controls the overall operation of each part of the cutting device 30 .
The conveying section 32 conveys the paper conveyed from the image reading device 20 to the cutting section 33 , and conveys the paper that has been cut by the cutting section 33 to the paper discharge section 34 .
The cutting unit 33 cuts the paper conveyed by the conveying unit 32 (paper on which an image has been printed by the image forming unit 14).
The paper discharge section 34 discharges the paper conveyed by the conveyance section 32 to the outside of the apparatus (paper discharge tray T1).
The waste box 35 is provided below the cutting unit 33 and stores cutting waste generated when the paper is cut by the cutting unit 33 .

Next, the control of the image forming system 1 according to this embodiment will be described with reference to the flowchart in FIG. 3. The control in FIG. 3 is started when the control unit 16 of the image forming device 10 acquires a print job from an external device or the like via the controller IF 18. The control unit 16 controls the image reading device 20 via the control unit 21. The control unit 16 also controls the cutting device 30 via the control unit 31.

First, the control unit 16 refers to the acquired print job and acquires the printing conditions of the print job (step S101). The printing conditions include, for example, the model, paper type, basis weight, paper size, printing rate, temperature and humidity, and other information that can be acquired by sensors.

Next, the control unit 16 compares the print conditions of the acquired print job with the print conditions at the time of the printing abnormality stored in the memory unit 17 (step S102). In other words, the control unit 16 functions as a comparison unit of the present invention.

Next, the control unit 16 determines whether the printing conditions of the print job match the printing conditions when the printing abnormality occurred (step S103).
When the control unit 16 determines that the printing conditions match (step S103: YES), the process proceeds to the next step S104.
On the other hand, if the control unit 16 determines that the printing conditions do not match (step S103: NO), the process proceeds to step S106.

In step S104, the control unit 16 judges whether the occurrence of a printing abnormality can be avoided by changing the printing rate of the print job. That is, the control unit 16 functions as a judgment unit of the present invention. For example, if the printing rate of the print job is 80% or more, the printing abnormality is likely to occur. This is because the amount of toner is too large, causing toner scattering, or causing poor fixing of toner in a low temperature environment. Also, if the printing rate of the print job is 20% or less, the printing abnormality is likely to occur. This is because the stiffness of the paper is too low, making it easy for the paper to curl. Therefore, for example, when the printing rate is 85%, the control unit 16 judges that the occurrence of a printing abnormality can be avoided by changing the printing rate to less than 80%. On the other hand, when the printing rate is 60%, for example, the control unit 16 judges that the occurrence of a printing abnormality cannot be avoided even if the printing rate is changed.
When the control unit 16 determines that the occurrence of the printing abnormality can be avoided (step S104: YES), the control unit 16 proceeds to the next step S105.
On the other hand, if the control unit 16 determines that the occurrence of the printing abnormality cannot be avoided (step S104: NO), it stops printing (step S112).

Next, the control unit 16 changes the printing rate of the print job so as not to cause printing abnormalities (step S105). In other words, the control unit 16 functions as the change unit of the present invention.

For example, the control unit 16 changes the imposition (printing order) of the print job so that the printing rate per sheet is uniform, thereby changing the printing rate of the print job.
Fig. 4 shows an example of a printed sheet P before changing the imposition. The example shown in Fig. 4 shows how image data (images) of four pages are imposed and printed on one sheet of paper P. Reference P1 indicates the first sheet of paper on which an image G1 of a page with a low print rate is printed. Reference P2 indicates the second sheet of paper on which an image G2 of a page with a high print rate is printed.
FIG. 5 shows an example of the paper P after printing with the imposition changed.
5, the imposition of the print job is changed so that the printing rate per sheet of paper P is uniform. Specifically, two pages of an image G1 of a page with a low printing rate and an image G2 of a page with a high printing rate are printed on each sheet of paper P (P1, P2). This makes it possible to change the printing rate of the print job, thereby reducing the probability of printing abnormalities occurring.

Furthermore, the control unit 16 changes the paper on which the image is printed by the image forming unit 14 to a paper having a larger paper size than the original paper, thereby making it possible to change the printing rate of the print job.
6A and 6B show an example of the same image printed on the original paper P3 before and after the paper size is changed, respectively. Fig. 6A shows an example of an image printed on the original paper P3. Fig. 6B shows an example of an image printed on paper P4, which is larger in size than the original paper P3.
6 shows an example in which the print rate of the original paper P3 is too high, which may cause printing abnormalities, so the paper size is changed to paper P4, which is larger. In the example shown in Fig. 6, the print rate of the print job is reduced by changing from the original paper P3, which has a higher print rate, to paper P4, which is larger. This reduces the probability of printing abnormalities occurring.
If the print coverage of the original paper is too low and there is a risk of print errors occurring, it is a good idea to change to paper with a smaller size, which will increase the print coverage of the print job and reduce the chance of print errors occurring.
When the paper size is changed to the larger paper P4, the control unit 16 controls the cutting unit 33 to cut the margins of the changed paper P4 so that the paper size is the same as that of the original paper P3. This makes it possible to form the same final product as when the original paper P3 is printed.

The control unit 16 also changes the print density of the print job, thereby changing the printing rate of the print job.
7A and 7B show examples of paper P on which images are printed before and after changing the print density. Fig. 7A shows an example of paper P on which an original image G3 before the print density is changed is printed. Fig. 7B shows an example of paper P on which an image G4 after the print density is changed is printed.
7 shows an example in which the paper P on which the original image G3 is printed is changed to a paper P on which an image G4 with a lighter print density is printed, because the print rate of the paper P on which the original image G3 is printed is too high and there is a risk of print abnormalities occurring. In the example shown in Fig. 7, the print rate of the print job is reduced by changing from the original image G3, which has a high print rate, to an image G4 with a lighter print density. This makes it possible to reduce the probability of print abnormalities occurring.
If the printing rate of the paper P on which the original image is printed is too low and there is a risk of printing abnormalities occurring, it is advisable to print an image with a darker print density. This makes it possible to increase the printing rate of the print job, thereby reducing the probability of printing abnormalities occurring.

Next, the control unit 16 prints (forms) an image on paper based on the image data included in the print job (step S106). The paper on which the image has been printed is transported to the image reading device 20.

Next, the control unit 16 controls the image reading unit 22 to read the paper on which the image is printed (step S107). The image obtained by reading the image reading unit 22 is output to the control unit 16. The paper read by the image reading unit 22 is discharged to the paper output tray T1 via the cutting device 30.

Next, the control unit 16 compares the expected image based on the image data included in the print job with the read image acquired in step S108 (step S108).

Next, the control unit 16 compares the expected image with the read image to determine whether or not a printing abnormality has occurred (step S109). Printing abnormalities include, for example, stains, streaks, glowing spots, color unevenness, and jams.
When the control unit 16 determines that a printing abnormality has occurred (step S109: YES), the control unit 16 proceeds to the next step S110.
On the other hand, if the control unit 16 determines that no printing abnormality has occurred (step S109: NO), the process proceeds to step S111.

In step S111, the control unit 16 stores the printing conditions used when printing was performed in step S106 in the memory unit 17 (step S110). That is, when a printing abnormality occurs, the control unit 16 functions as a memory control unit of the present invention that stores the printing conditions used when the printing abnormality occurs in the memory unit 17.

Next, the control unit 16 determines whether or not printing is completed (step S111).
When the control unit 16 determines that the printing is completed (step S111: YES), the process ends.
On the other hand, if the control unit 16 determines that the printing is not completed (step S111: NO), the control unit 16 proceeds to step S102, and then repeats the processes from step S102 onward.

As described above, the image forming system 1 according to the present embodiment includes the image forming unit 14 that prints an image on paper, a storage control unit (control unit 16), a collation unit (control unit 16), and a determination unit (control unit 16). When a printing abnormality occurs during printing by the image forming unit 14, the storage control unit stores the printing conditions at the time of the printing abnormality in the storage unit 17. Before printing of a print job, the collation unit compares the printing conditions of the print job with the printing conditions at the time of the printing abnormality stored in the storage unit 17. When the collation unit finds that the printing conditions of the print job match the printing conditions at the time of the printing abnormality as a result of the collation, the determination unit determines whether the occurrence of the printing abnormality can be avoided by changing the print rate of the print job.
Therefore, the image forming system 1 according to the present embodiment can reduce the probability of occurrence of a printing abnormality. Furthermore, even if the printing conditions of a print job match the printing conditions when a printing abnormality occurs, printing can be continued.

The printer also includes a change unit (control unit 16) that changes the printing rate of the print job so as to prevent the occurrence of the printing abnormality when it is determined that the occurrence of the printing abnormality can be avoided.
Therefore, it is possible to reduce the probability of a printing abnormality occurring. Also, even if the printing conditions of the print job match the printing conditions when a printing abnormality occurs, printing can be continued.

The change unit also changes the imposition of the print job so that the printing rate per sheet of paper is uniform.
This makes it possible to easily change the printing rate of a print job, thereby reducing the probability of a printing error occurring.

The printer also includes a cutting unit 33 that cuts the paper on which an image has been printed by the image forming unit 14. The change unit changes the paper on which an image is printed by the image forming unit 14 to paper with a larger paper size than the original paper. The change unit causes the cutting unit 33 to cut the changed paper so that it has the same paper size as the original paper.
Therefore, the printing rate of the print job can be easily changed, the probability of occurrence of printing abnormalities can be reduced, and the same output as that obtained by printing on the original paper can be produced.

The change unit also changes the print density of the print job.
Therefore, the printing rate of the print job can be easily changed, the probability of occurrence of printing abnormalities can be reduced, and the same output as that obtained by printing on the original paper can be produced.

The above is a detailed explanation based on an embodiment of the present invention, but the present invention is not limited to the above embodiment and can be modified without departing from the gist of the invention.

For example, in the above embodiment, the print rate of the print job is changed when the printing conditions of the print job and the printing conditions at the time of the printing abnormality match, but this is not limited to this. For example, the print rate of the print job may be changed when the print rate of the print job and the print rate at the time of the printing abnormality match. In other words, when the print rate of the print job and the print rate at the time of the printing abnormality match, the control unit 16 determines whether or not the occurrence of the printing abnormality can be avoided by changing the print rate of the print job. If it is determined that the occurrence of the printing abnormality can be avoided, the control unit 16 changes the print rate of the print job so as not to cause the printing abnormality.

Furthermore, the control unit 16 may cause a preview of an image G4 (see FIG. 7B) with a changed print density to be displayed on the display unit 12. That is, the control unit 16 functions as a display control unit of the present invention.
This allows the user to concretely imagine the printed product, and thus allows the user to arbitrarily select whether to prioritize suppression of printing abnormalities or image quality.

Furthermore, the control unit 16 may cause the image forming unit 14 to print a sample of the image G4 (see FIG. 7B) whose print density has been changed on a sheet of paper. That is, the control unit 16 functions as a print control unit of the present invention.
This allows the user to concretely imagine the printed product, and thus allows the user to arbitrarily select whether to prioritize suppression of printing abnormalities or image quality.

In addition, the detailed configuration and operation of each device constituting the image forming system may be modified as appropriate without departing from the spirit and scope of the present invention.

1 Image forming system 10 Image forming device 11 Operation unit 12 Display unit 13 Document reading unit 14 Image forming units 141Y, 141M, 141C, 141K Photoconductor drum 142 Intermediate transfer belt 143 Secondary transfer roller 144 Fixing unit 15 Paper feed units 151 to 153 Paper feed tray 16 Control unit (collation unit, judgment unit, change unit, storage control unit, display control unit, print control unit)
17 Memory section 18 Controller IF
19 Image processing section 20 Image reading device 21 Control section 22 Image reading section 23 Image processing section 30 Cutting device 31 Control section 32 Conveying section 33 Cutting section 34 Paper discharge section 35 Wastebasket T1 Paper discharge tray

Claims (9)

an image forming unit that prints an image on paper;
a memory control unit that, when a printing abnormality occurs during printing by the image forming unit, stores in a memory unit the printing conditions at the time of the printing abnormality;
a collation unit that collates a printing condition of the print job with the printing condition at the time of the printing abnormality stored in the storage unit before the print job is executed;
a determination unit that, when the printing conditions of the print job and the printing conditions at the time of the printing abnormality match as a result of the comparison by the comparison unit, determines whether the occurrence of the printing abnormality can be avoided by changing the printing rate of the print job;
An image forming system comprising: The image forming system according to claim 1, further comprising a change unit that changes the print rate of the print job so as not to cause the printing abnormality when the determination unit determines that the printing abnormality can be avoided. The image forming system according to claim 2, characterized in that the change unit changes the imposition of the print job so as to equalize the printing rate per sheet of paper. a cutting unit that cuts the paper on which the image is printed by the image forming unit,
The image forming system according to claim 2, characterized in that the change unit changes the paper on which the image is printed by the image forming unit to paper having a paper size larger than the original paper, and causes the cutting unit to cut the changed paper so that it has the same paper size as the original paper. The image forming system according to claim 2, characterized in that the change unit changes the print density of the print job. The image forming system according to claim 5, further comprising a display control unit that displays a preview of the image in which the print density has been changed by the change unit on a display unit. The image forming system according to claim 5, further comprising a print control unit that causes the image forming unit to print a sample of the image whose print density has been changed by the change unit on the paper. A method for avoiding a printing abnormality in an image forming system having an image forming unit that prints an image on a sheet, comprising:
a storage control step of storing, in a storage unit, printing conditions at the time of occurrence of a printing abnormality in a printing process performed by the image forming unit;
a comparison step of comparing, before printing of the print job, the print conditions of the print job with the print conditions at the time of the printing abnormality stored in the storage unit;
a determination step of determining whether or not the occurrence of the printing abnormality can be avoided by changing a printing rate of the print job when the printing conditions of the print job and the printing conditions at the time of the printing abnormality coincide as a result of the comparison in the comparison step;
Includes methods to avoid printing abnormalities. A computer of an image forming system including an image forming unit that prints an image on a sheet of paper,
a storage control unit that stores, in a storage unit, printing conditions at the time of occurrence of a printing abnormality in a printing process performed by the image forming unit;
a collation unit that collates, before printing of a print job, a printing condition of the print job with the printing condition at the time of the printing abnormality stored in the storage unit;
a determination unit that, when the printing conditions of the print job and the printing conditions at the time of the printing abnormality match as a result of the comparison by the comparison unit, determines whether the occurrence of the printing abnormality can be avoided by changing a printing rate of the print job;
A program to function as a

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