Printing Density Restriction Device and Printing Density Restriction Method

摘要

The present invention relates to a printing density limiting device and a printing density limiting method of a printing apparatus, comprising a hammer bank having a plurality of hammers serving as printing elements, and a shuttle mechanism for reciprocating the hammer bank. A printing apparatus which prints by driving a hammer during a reciprocating movement of a hammer, comprising: a drive count counter means for each hammer arranged to count drive counts for each hammer, and a timer circuit started every predetermined time And means for varying the prescribed value of the hammer drive frequency specified within a predetermined time according to the past performance of the drive frequency of the hammer, and when it is detected that the specified value of the print limit has been reached, printing from that time until the end of the predetermined time. By having a printing stop means to stop the operation, the hammer parts' capacity is limited to the limit without causing a decrease in the life of the hammer parts. It.In my therefore, it is possible to achieve an increase in the special print pattern effective printing speed at the time of printing.