Patent ID: 7401881

Claim:
A liquid ejection apparatus for ejecting liquid, comprising: a movable ejection head for ejecting liquid; a feed mechanism for feeding a medium; a sensor for detecting a position of an edge of said medium; and a controller for executing position determination control for determining at least one of a starting position and an ending position for ejecting the liquid from said moving ejection head onto said medium that is feed by said feed mechanism, wherein: said position determination control by said controller differs for when ejecting the liquid from said ejection head to a region within a predetermined range from a front edge or a rear edge, in a feed direction, of said medium, and for when ejecting the liquid from said ejection head to a central region, in said feed direction, of said medium, said sensor is capable of moving together with said ejection head; when ejecting the liquid from said ejection head to said central region, in said feed direction, of said medium, said controller executes sensor-based position determination control that determines at least one of the starting position and the ending position for ejecting the liquid from said ejection head for a next movement, based on a position of the edge detected by said sensor during the current movement; and when ejecting the liquid from said ejection head to said region within said predetermined range from the front edge or the rear edge, in said feed direction, of said medium, said controller does not execute said sensor-based position determination control.