Printer and non-transitory computer-readable medium storing program

A non-transitory, computer-readable medium storing a program for a controller configured to control a printing part,

• the printing part including:
• a conveyor configured to convey a medium in a conveying direction;
• a printing head having a plurality of nozzles from which an ink of a specified color is discharged and of which positions in the conveying direction are mutually different, the printing head being configured to discharge the ink from the plurality of nozzles to the medium so as to form dots in the medium;
• and
• a facing member configured to be capable of facing a print surface of the medium on an upstream side in the conveying direction with respect to the plurality of nozzles of the printing head,
• wherein the program causing a computer of the controller to realize printing of a print image by the printing part, by causing the printing part to execute a partial printing of forming the dots by the printing head and a conveyance of the medium by the conveyor alternately and a plurality of times,
• wherein in a case that the program causes the printing part to print the print image, the program causing:
• the printing head to execute a first partial printing not less than one time, the first partial printing being the partial printing executed in a state that the medium faces the facing member;
• the conveyor to convey the medium by a first conveying amount, after causing the printing head to execute the first partial print not less than one time;
• the printing head to execute a second partial printing not less than one time, after causing the conveyor to convey the medium by the first conveying amount, the second partial printing being the partial printing executed in the state that the medium faces the facing member;
• the conveyor to convey the medium by a second conveying amount, which is smaller than the first conveying amount, after causing the printing head to execute the second partial print not less than one time;
• the printing head to execute a third partial printing not less than one time, after causing the conveyor to convey the medium by the second conveying amount, the third partial printing being the partial printing executed in a state that the medium is arranged at a specified position in the conveying direction at which a predetermined position, of an end part on the upstream side in the conveying direction of the medium, faces the facing member;
• the conveyor to convey the medium, after causing the printing head to execute the third partial printing not less than one time;
• and
• after causing the conveyor to convey the medium, the printing head to execute a fourth partial printing not less than one time, the fourth partial printing being the partial printing executed in a state that the medium does not face the facing member,
• wherein a first area printed by the first partial printing includes a first normal area which is printed only by the first partial printing, and a first end area which is arranged on the upstream side in the conveying direction with respect to the first normal area and which is printed by both of the first partial printing and the second partial printing,
• wherein a second area printed by the second partial printing includes the first end area, a second normal area which is arranged on the upstream side in the conveying direction with respect to the first end area and which is printed only by the second partial printing, and a second end area which is arranged on the upstream side in the conveying direction with respect to the second normal area and which is printed by both of the second partial printing and the third partial printing,
• wherein a third area printed by the third partial printing includes the second end area and a third end area which is arranged on the upstream side in the conveying direction with respect to the second end area and which is printed by both of the third partial printing and the fourth partial printing,
• wherein a fourth area printed by the fourth partial printing includes the third end area and a fourth normal area which is arranged on the upstream side in the conveying direction with respect to the third end area and which is printed only by the fourth partial printing,
• wherein the program causes:
• in a case that the second conveying amount is not less than a reference, the computer of the controller to realize determination of a used nozzle range in the second partial printing to be a first range which is same as the used nozzle range in the first partial printing;
• and
• in a case that the second conveying amount is smaller than the reference, the computer of the controller to realize determination of the used nozzle range in the second partial printing to be a second range which is smaller than the first range,
• wherein the used nozzle range is a range in the conveying direction including nozzles, among the plurality of nozzles, which are used in the partial printing,
• wherein the second range is a range not including a predetermined range which is a part on the upstream side in the conveying direction of the first range, and
• wherein an image as a part of the print image within an area corresponding to the predetermined range in the second partial printing is printed by the third partial printing.