Fluid ejecting apparatus and fluid ejecting method

A fluid ejecting apparatus comprising:

• a head that is provided with a first nozzle row in which nozzles ejecting fluid are arranged in a predetermined direction, and a second nozzle row in which nozzles ejecting the fluid are arranged in the predetermined direction, the first nozzle row and the second nozzle row being arranged in a movement direction crossing the predetermined direction;
• a platen that supports a medium opposed to the head and is provided with a plurality of convex portions arranged in the movement direction on the side opposed to the medium;
• and
• a control unit that repeatedly performs an ejection operation of ejecting fluid from the nozzles moving in two directions of a forward path and a backward path while moving the head forward and backward and an operation of relatively moving relative positions of the head and the medium in one direction of the predetermined direction,
• wherein the control unit adjusts an ejection time for the fluid from the first nozzle row and the second nozzle row such that, at parts of the medium corresponding to valley portions extending between the convex portions arranged in the movement direction, an amount of deviation in the movement direction of the dots formed on the forward path by the first nozzle row and the dots formed on the backward path by the first nozzle row is less than an amount of deviation in the movement direction of the dots formed on the forward path by the second nozzle row and the dots formed on the backward path by the second nozzle row, and such that, in the ejection operation, the position in the movement direction of the dots formed by the second nozzle row is a position of the side on which the head moves in the movement direction with respect to the position in the movement direction of the dots formed by the first nozzle row.

A fluid ejecting method of a fluid ejecting apparatus including a head that is provided with a first nozzle row in which nozzles ejecting fluid are arranged in a predetermined direction, and a second nozzle row in which nozzles ejecting the fluid are arranged in the predetermined direction, the first nozzle row and the second nozzle row being arranged in a movement direction crossing the predetermined direction, and a platen that supports a medium opposed to the head and is provided with a plurality of convex portions arranged in the movement direction on the side opposed to the medium, in which an ejection operation of ejecting fluid from the nozzles moving in two directions of a forward path and a backward path while moving the head forward and backward and an operation of relatively moving relative positions of the head and the medium in one direction of the predetermined direction are repeatedly performed,

• wherein an ejection time for the fluid from the first nozzle row and the second nozzle row is adjusted such that, at parts of the medium corresponding to the convex portions, an amount of deviation in the movement direction of the dots formed on the forward path by the first nozzle row and the dots formed on the backward path by the first nozzle row is less than an amount of deviation in the movement direction of the dots formed on the forward path by the second nozzle row and the dots formed on the backward path by the second nozzle row, and such that, in the ejection operation, the position in the movement direction of the dots formed by the second nozzle row is a position opposite to the side on which the head moves in the movement direction with respect to the position in the movement direction of the dots formed by the first nozzle row.