Printing method, printing device, and non-transitory computer readable medium storing program

A printing device that performs printing, the printing device comprising:

• an inkjet head having a nozzle row in which a plurality of nozzles are arranged;
• a main scan driving unit configured to cause the inkjet head to perform a main scan of ejecting ink while relatively moving in a predetermined main scanning direction with respect to a medium as a printing target;
• a sub scan driving unit configured to cause the inkjet head to perform a sub scan of relatively moving in a sub scanning direction orthogonal to the main scanning direction with respect to the medium;
• and
• a control unit configured to control operations of the inkjet head, the main scan driving unit, and the sub scan driving unit,
• the printing device performing printing on the medium by causing the inkjet head to perform the main scan and the sub scan, and being able to execute a pass modulation operation in which the main scan is executed on a basis of a set number of passes that is a number set with an integer value of 1 or more and a number of times of the main scan performed on at least a part of the medium is made larger than the set number of passes,
• wherein the control unit executes
• a data acquisition process of acquiring print data indicating an image to be printed,
• a condition setting process of setting a print condition that is a condition of printing to be executed by the printing device,
• a condition check process of checking the print condition set in the condition setting process, and
• a print execution process of causing the printing device to execute a printing operation based on the print data,
• in the condition setting process, at least a pass modulation degree indicating a degree of modulation for changing the number of times of the main scan performed on at least a part of the medium in the pass modulation operation is set as the print condition, and
• in the condition check process, the control unit executes
• a defective nozzle check process of checking whether or not a defective nozzle that is the nozzle having a defective ejection characteristic is present in the nozzle row of the inkjet head,
• a recovery check process of checking whether or not nozzle recovery is possible using the nozzle different from the defective nozzle in a case where the defective nozzle is present, and
• a condition search process of searching for the new print condition in a case where the defective nozzle is present and the nozzle recovery is impossible, the condition search process being a process of searching for the print condition that enables the nozzle recovery by changing the pass modulation degree.

A non-transitory computer readable medium storing a program for controlling an operation of a printing device that performs printing, the program causing the printing device to perform:

• a data acquisition process of acquiring print data indicating an image to be printed;
• a condition setting process of setting a print condition that is a condition of printing to be executed by the printing device;
• a condition check process of checking the print condition set in the condition setting process;
• and
• a print execution process of causing the printing device to execute a printing operation based on the print data, wherein
• the printing device includes an inkjet head having a nozzle row in which a plurality of nozzles are arranged, performs printing on a medium as a printing target by causing the inkjet head to perform a main scan of ejecting ink while relatively moving in a predetermined main scanning direction with respect to the medium, and a sub scan of relatively moving in a sub scanning direction orthogonal to the main scanning direction with respect to the medium, and is able to execute a pass modulation operation in which the main scan is executed on a basis of a set number of passes that is a number set with an integer value of 1 or more and a number of times of the main scan performed on at least a part of the medium is made larger than the set number of passes,
• in the condition setting process, at least a pass modulation degree indicating a degree of modulation for changing the number of times of the main scan performed on at least a part of the medium in the pass modulation operation is set as the print condition, and
• in the condition check process, the printing device is caused to perform
• a defective nozzle check process of checking whether or not a defective nozzle that is the nozzle having a defective ejection characteristic is present in the nozzle row of the inkjet head,
• a recovery check process of checking whether or not nozzle recovery is possible using the nozzle different from the defective nozzle in a case where the defective nozzle is present, and
• a condition search process of searching for the new print condition in a case where the defective nozzle is present and the nozzle recovery is impossible, the condition search process being a process of searching for the print condition that enables the nozzle recovery by changing the pass modulation degree.