| 摘要 |
PURPOSE:To improve printing quality, reliability and maintainability by providing a means to memorize and indicate the integral frequency of using a printing hammer per printing hammer group and enabling optimal maintenance and replacement work to be carried out per printing hammer. CONSTITUTION:A signal 108 to read out a printing history memory (MEM)22 is transmitted to the R/W terminal of MEM22 at a coincidence signal 104 to be transmitted to CNT terminal of a memory control (CTL). Then memory data 109 is read out to a counter (CNT)21 from DT terminal. '1' is added to the readout content at CNT21 and it is again written into the same address of MEM22. In this way, memory data 109 of MEM22 corresponding to a designated printing hammer group is read out of the DT terminal and added to DT terminal of a memory data display (DSP). Thus the use history of each printing hammer group is available. |
