JP2005059451A5 - - Google Patents

Claims (10)

A liquid ejecting apparatus including a transport mechanism that transports the medium in the transport direction and a plurality of nozzle groups, each of the nozzle groups having a plurality of nozzles arranged along the transport direction;
A liquid ejecting apparatus comprising: a plurality of sensors that detect the position of the edge of the medium and output edge position information corresponding to each nozzle group. The liquid ejection apparatus according to claim 1,
The plurality of nozzle groups are arranged along the transport direction,
While moving the nozzle group in a crossing direction intersecting the transporting direction, performing a discharge operation for discharging liquid from the nozzle and a transporting operation for transporting a medium with a predetermined transport amount to the nozzle group,
A liquid discharge apparatus, wherein at least one of a liquid discharge start position and a discharge stop position is determined for each nozzle group based on end position information of a sensor corresponding to the nozzle group. The liquid ejection device according to claim 1 or 2,
The liquid ejecting apparatus according to claim 1, wherein each of the sensors is disposed closest to a nozzle group that the sensor is responsible for. The liquid ejection apparatus according to any one of claims 1 to 3,
Based on end position information of at least two sensors having different arrangement positions with respect to the transport direction, an inclination angle from the transport direction of the medium is calculated,
The liquid ejection apparatus, wherein the calculated value of the tilt angle is further used as end position information to determine at least one of a start position and a stop position at which the liquid is ejected. The liquid ejection apparatus according to claim 4, wherein
The discharge start position and the discharge stop position of each nozzle group are changed based on the calculated value M calculated by the following equation from the inclination angle θ and the length H0 of the nozzle group alone in the transport direction. Liquid ejecting device.
M = H0 × tanθ The liquid ejection apparatus according to any one of claims 2 to 5,
The liquid discharge apparatus, wherein the discharge start position and the discharge stop position are set outside an end of the medium. The liquid ejection apparatus according to any one of claims 2 to 6,
The sensor moves in the cross direction with the nozzle group,
The sensor includes a light emitting unit for emitting light, and a light receiving unit for receiving the light that moves in the crossing direction according to the movement of the light emitting unit in the crossing direction,
Detecting the position of the end of the medium based on a change in the output value of the light receiving unit caused by the light emitted by the light emitting unit moving in the intersecting direction being blocked by the end. Liquid ejecting device. The liquid ejection device according to claim 7, wherein
A liquid ejection apparatus that determines at least one of a liquid ejection start position and a stop position during a current movement operation based on end position information detected during a previous movement operation of the nozzle group . A transport mechanism for transporting the medium in the transport direction; and a plurality of nozzle groups arranged along the transport direction, each of the nozzle groups having a plurality of nozzles disposed along the transport direction;
Liquid that performs a discharge operation for discharging liquid from the nozzles and a transport operation for transporting a medium by a predetermined transport amount to the nozzle groups while moving the nozzle group in a crossing direction that intersects the transporting direction. A discharge device,
A plurality of sensors for detecting the position of the end of the medium in the intersecting direction and outputting end position information are provided corresponding to each nozzle group,
Each sensor is arranged closest to the nozzle group that it is responsible for,
The sensor moves in the crossing direction together with the nozzle group, and the sensor receives a light emitting part for emitting light and the light moving in the crossing direction according to the movement of the light emitting part in the crossing direction. A light receiving portion for the light source, and the light emitted by the light emitting portion moving in the intersecting direction is based on a change in an output value of the light receiving portion due to being blocked by the end portion. Detects the position of
Based on end position information of at least two sensors having different arrangement positions with respect to the transport direction, an inclination angle from the transport direction of the medium is calculated,
Based on the calculated value of the tilt angle and the end position information of the sensor corresponding to the nozzle group, at least one of the liquid discharge start position and the discharge stop position is determined for each nozzle group, and the outside of the end of the medium. The discharge start position and the discharge stop position are set,
A liquid discharge apparatus, wherein at least one of a discharge start position and a discharge stop position in a current movement operation is determined based on end position information detected during a previous movement operation of a nozzle group. A liquid ejecting method using a liquid ejecting apparatus that includes a transport mechanism that transports a medium in a transport direction and a plurality of nozzle groups, and each of the nozzle groups includes a plurality of nozzles arranged along the transport direction. And
A liquid ejection method, wherein a plurality of sensors that detect the position of the edge of the medium and output edge position information are used corresponding to each nozzle group.