| 摘要 |
PURPOSE:To permit the print timing to be controlled by a reduced number of parts, by providing an interruption circuit which has an interval timer for controlling the excitation time of a print hammer and demands subsequent print data in response to the rise of the excitation time. CONSTITUTION:A disk sensor type dot printer which is controlled by a microcomputer has a control circuit which controls print data and print drive time by detecting print timing. The circuit is provided with: a circuit 19 which instructs a shuttle motor 12 to rotate; a circuit which receives a signal from a photosensor amplifier 18 provided on the printer; a flip-flop which turns ON/OFF the signal-receivng circuit; an interruption circuit which has an interval timer for controlling the excitation time of a print hammer 16 and demands subsequent print data in response to the rise of the excitation time; an input buffer circuit which receives the subsequent print data; and an output buffer. Thus, it is possible to easily change the microcomputer occupying time and the print hammer excitation time, and the print timing can be controlled by a reduced number of of parts. |
