Patent ID: 7798587
Filing Date: 2010-09-21
Classification: B41J

Abstract:
1. A method of controlling cross-process location of print heads in a print system, comprising: identifying a first roll error frequency related to a circumference of a first roll defining a process path of a web; identifying a first roll error phase with respect to a reference location along a process path; identifying a first roll error amplitude of cross-process motion; identifying a second roll error frequency related to a circumference of a second roll defining the process path of the web; identifying a second roll error phase with respect to the reference location; identifying a second roll error amplitude of cross-process motion; and controlling the cross-process position of a first print head and a second print head based upon the identified first roll error frequency, first roll error phase, first roll error amplitude, second roll error frequency, second roll error phase, and second roll error amplitude, wherein the first print head is axially spaced apart from the second print head along the process direction of the process path.