Liquid jetting apparatus

A liquid jetting apparatus comprising:

• a conveyor configured to convey a recording medium in a conveyance direction;
• a liquid jet head including a plurality of nozzles aligned in the conveyance direction, the plurality of nozzles including a first nozzle and a second nozzle;
• a carriage on which the liquid jet head is mounted;
• a carriage moving device configured to move the carriage in a scanning direction intersecting the conveyance direction;
• and
• a controller configured to control the conveyor, the liquid jet head, and the carriage moving device to:
• print an image on the recording medium based on print data by repeating a scan-printing operation to jet the liquid from the plurality of nozzles while moving the carriage in the scanning direction and a conveyance operation to cause the conveyor to convey the recording medium in the conveyance direction after the scan-printing operation is finished;
• and
• determine, based on a value of a correction parameter, a jet-timing to jet the liquid from the nozzles in the scan-printing operation such that both a first jet-timing in a print area of the recording medium located upstream of a reference position in the scanning direction and a second jet-timing in a print area of the recording medium located downstream of the reference position in the scanning direction deviate with respect to a reference timing, and that a deviation of the first jet-timing from the reference timing is opposite to a deviation of the second jet-timing from the reference timing,
• wherein the correction parameter is set to a first value for the first nozzle and is set to a second value for the second nozzle, the second value is different from the first value.