Active Alignment of Print Heads
Abstract:This paper describes an automated approach to maintain the alignment of modular direct marking print heads. An inline full width array sensor monitors the print head alignment and drop position within a print head by capturing and analyzing test patterns written to an intermediate drum. Unique steps are taken in illumination and calibration to ensure the structured drum media does not degrade the alignment measurement. The image is processed to identify the position of each mark. Interpolation and statistical averaging increase the accuracy beyond the resolution of the linear array. Both digital manipulation of the image and physical movement of the heads are used to maintain alignment.
Document Type: Research Article
Publication date: January 1, 2009
For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.
Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.
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