Specifications

2 - 13
2.6.4 Control of Printing Pulse Width
Superior print quality can be maintained by controlling the print pulse width by the
print pulse width control circuit. This is an oscillating circuit in which the frequency
varies depending upon the voltage and ambient temperature, and provides a
specified pulse width by counting a certain number of pulses with the CPU.
The leading edge of the pulse is synchronized with the timing signal. Control the
leading edge of the pulse by the pulse width control circuit to obtain the rated
applied energy.
Figure 2-8 Pulse Width Control
Timing signal
Head drive signal
t t
0.8t
Do not exceed maximum specified energy.
•
Avoid continuous energizing.
•
When driving the same dot successively, reduce the applied energy to 80% of the
rated applied energy and slow down the rise of the head driving signal.