US 6,550,886 B2 · Ink jet printer capable of adjusting deflection amount in accordance with positional shift of head modules

Abstract

An ink jet recording device 1 includes a plurality of head modules 101 each formed with a plurality of nozzles. The ink jet recording device 1 prints a test pattern using the all nozzle of the head modules 101. Precise positions of dots forming the test pattern are detected, based on which positional shifts of the head modules 101 are calculated. The deflection amount and ink ejection timing for each head module 101 are changed based on the detected positional shift. In this manner, positional shifts of the assembled head modules 101 are electrically corrected without mechanically changing the physical positions of the head modules 101.

Claims17

Dependent claims

An ink jet recording device comprising:

at least one head module formed with a row of a plurality of nozzles from which an ink droplet is selectively ejected onto a recording medium, the row extending in a first direction;
a deflecting means for deflecting a flying direction of the ink droplet toward a second direction perpendicular to the first direction by a deflection amount, wherein the ink droplet alights on an optional position of the recording medium;
a transporting means for transporting the recording medium relative to the head modules in a third direction angled from the first direction;
a detection means for detecting a positional error of the optional position with respect to a reference position;
and
a control means for controlling the deflecting means to change the deflection amount in accordance with the positional error.

3 more elements

Dependencies are inferred from the claim text.

Ink jet printer capable of adjusting deflection amount in accordance with positional shift of head modules

Life of this patent

Ink jet printer capable of adjusting deflection amount in accordance with positional shift of head modules

Life of this patent

Abstract

Claims17