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摘要

A system and method are disclosed for analyzing operation of an ink jet head. Initiation of start-up is sensed, as is the pressure build-up in the ink jet head as ink is supplied thereto. The time lapse between initiation of start-up and the commencement of pressure build-up is determined, as is the time required for the pressure within the ink jet head to build to an operational level, and outputs indicative thereof are utilized for determination of fault occurrence and indication of faults or initiation of fault correction in response thereto. The system includes a pair of counters controlled by start-up initiation and the outputs from a pair of comparators which receive predetermined reference signals and signals indicative of pressure build-up at the ink jet head, with the outputs from the counters being coupled to a microcomputer for determination of faults.