実稼動解析によるデジタル印刷機の振動特性把握

～主要ユニットの振動実験と実稼動解析～

抄録

The purpose of this study is to identify vibration properties of a digital printing machine. The digital printing machine is composed of several units, e.g. Laser Unit (LU), Photoconductor Unit (PC), Process Frame (PF), 1^st Transfer Belt Unit (TB), etc. They are mounted on a frame structure and the vibration properties are softly coupled. In a previous study, vibration properties of the entire digital printing machine were identified. In this study, investigation is conducted with LU focused on. It is important to understand vibration properties of LU to improve print quality. The vibration of LU is measured in operating conditions, and the vibration peaks are identified in some frequencies, where Frequency Domain Decomposition (FDD) is carried out. FDD method is used for the operational modal analysis and the dominant vibration components in printing status are extracted. From the results of FDD in vibration peaks, the influence of the vibration on print quality is studied. Comparing the results by FDD with those by excitation test, the influence of natural modes on the vibration in operation is investigated, and the excitation sources corresponding to vibration peaks are examined.