| 摘要 |
A printing machine comprises a charging device. The charging device comprises a coronode and a control grid. An included power supply supplies a coronode voltage to the coronode. Under control of the grid, the coronode generates ions which flow towards an included photosensitive surface. The printing machine includes a cleaning system which cleans the coronode and grid. The cleaning system is actuated based on an included method. The method comprises monitoring the coronode voltage, providing a predetermined threshold value, and determining that cleaning is needed based on when the coronode voltage equals the threshold value. Upon determining that cleaning is needed, the cleaning system is actuated or scheduled. Optionally, a cleaning message is sent to a user, operator or maintenance person who, in turn, actuates or schedules the cleaning system. |
