| 摘要 |
PURPOSE:To obtain a max. printing speed under a power source condition, by detecting the voltage level of magnet driving voltage by a voltage level detection means and setting a printing speed on the basis of the detected result. CONSTITUTION:A printing speed is set to 'HIGH' in a usual state and the printing of one line is performed at this printing speed. At this time, the remaining of printing data is confirmed and the voltage level of voltage VM is monitored by voltage detection circuits 17-19. for example, if said level is not detected by VB=35 bolt of the voltage detection circuit 17, that is, voltage VM is 35 volt or more, a main control part 12a sets a printing speed timer value TB setting the printing speed to 'HIGH' to a timer 20. In the same way, if voltage VM is 30-35 volt, the printing speed is set to 'INTERMEDIATE' and, if the voltage VM is 25-30 volt, the printing speed to 'LOW' and, if below 25 volt, the printing speed to 'MIN.'. By this method, the voltage VM is monitored by reference voltage VBVD to enable printing at the printing speed corresponding to the level of the voltage VM. |
