CONTROL OF PRINTING OPERATION OF PRINTING HEADS IN A DIGITAL PRINTING APPARATUS

摘要

A digital printing apparatus for inkjet printing on a sheet or web of material includes a belt for supporting and conveying the sheet or web of material fixed to the belt. The belt is guided along at least a first roller driven by a motor and a second roller driven by the belt. A plurality of printing heads is arranged along the path of the belt. A control system is configured to control the operation of the motor and the printing operation of the printing heads. A first encoder, being configured to supply a first encoder signal to the control system for controlling the operation of the motor, is associated with the first roller. A second encoder, being configured to supply a second encoder signal to the control system for controlling the printing operation of each printing head, is associated with the second roller.