US 12,350,930 B2
Print head angle and stitch alignment during full speed printer operation
David L. Knierim, Wilsonville, OR (US); and Chad J. Slenes, Sherwood, OR (US)
Assigned to XEROX CORPORATION, Norwalk, CT (US)
Filed by XEROX CORPORATION, Norwalk, CT (US)
Filed on Feb. 17, 2023, as Appl. No. 18/170,681.
Prior Publication US 2024/0278552 A1, Aug. 22, 2024
Int. Cl. B41J 29/393 (2006.01); B41J 2/045 (2006.01); B41J 2/21 (2006.01)
CPC B41J 2/04505 (2013.01) [B41J 2/0458 (2013.01); B41J 2/04581 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A printer, comprising:
a plurality of print heads configured to eject ink drops onto print media to form images;
a controller operatively connected to the plurality of print heads, the controller configured to execute code to cause the controller to control the print heads to eject ink drops to form the images including one or more test images;
one or more actuators to cause the print media to pass the plurality of print heads; and
at least one camera to capture one or more optical images of the print media after the print media passes the plurality of print heads at operating speed, the controller configured to execute code to cause the controller to detect the one or more test images in the one or more optical images and analyze the one or more test image to measure print characteristics in the test image, the controller further configured to execute code to perform image processing to compensate for lens barrel distortion of the camera in both a process direction and a cross-process direction.