Automatic Troubleshooting of Print Quality Defects in Inkjet Printers

摘要

When Print Quality is not reaching expected levels, current troubleshooting processes proposed to users follow two approaches. Either display a static list of recovery actions depending on the PQ problem (Line Quality, Banding, etc.) or request user to launch a diagnostic print, analyze it and then determine the corrective action which is required. In both cases, some user expertise is required. This paper describes a new concept being implemented in the Large Forma Photo Printer HP Designjet 26200 to automatically determine the status of a printing system in those areas affecting Print Quality and to actively propose to user a customized list of recommended actions to recover it. By analyzing the results of calibrations and internal checks (such as Printhead Alignment, Nozzle health detection, Color Calibration and Media Advance data) printer build in algorithm identifies most probable cause of the problem and displays a precise list of corrective actions based on it. The list of recovery actions is automatically displayed, so no need for interpretations/analysis by users. Actions are proposed in the optimal order. This is a dynamic list, so it's being updated every time an internal calibration or check is being performed. As a result, even for the non expert users, recovery actions success is highly improved. In case a service call is required, process allows to remotely diagnose printing system status increasing on-site repair success rate.