CORRECTING METHOD FOR IRREGULARLY ALIGNED DOT WIRE

摘要

PURPOSE:To correct some irregularly aligned wire dots to make a highly qualified printing by a dot matrix printing device by a method wherein a print drive timing is electrically adjusted for each of the dot wires in a printing head. CONSTITUTION:A shift registor 3 produces four kinds of print drive timing signals 10-13 of which phases are displaced by one cycle of a clock 7 by shifting a print device timing signal 6 with clock 7. A timing switching circuit 4 selects one of the four kinds of timing signals 10-13 and feeds it as a print drive timing signal 9 to an AND circuit 2. The AND circuit 2 feeds both a printing data signal 8 coming from a data latch circuit 1 for temporarily holding the printing data and the timing signal 9 as a driving signal 14 to the corresponding dot wire drive circuit. Thereby, a driving time for each of the dot wires may be adjusted.