3.5.6 Adjustment by Thermal Head Activation Pulse Cycle
The thermal head activation pulse cycle coefficient "C" can be calculated using equations (8) as the printing
density varies by the thermal head activation pulse cycle (equivalent for motor drive pulse rate).
Equation (8):
2100
2420)
(W'
3.78)
(Vp
6429
Vp
2230
1
C
W'
:
The time between the beginning of the last thermal head activation and the
beginning of present thermal head activation (
μ
s)
To calculate the activation pulse width t1 for the half dot line 2 (at step 3 and 4), W'1 shown in the figure below
should be set as W' defined at Equation (8).
To calculate the activation pulse width t2 for the half dot line 5 (at step 9 and 10), W'2 shown in the figure
below should be set as W' defined at Equation (8).
1st step 2nd step 3rd step
4th step
5th step
6th step
7th step
8th step
9th step 10th step
1st half dot line
2nd half dot line
3rd half dot line
4th half dot line
5th half dot line
DST
Motor step
1st dot line
2nd dot line
3rd dot line
11th step 12th step
6th half dot line
DST
W'1
W'2
t1
t2
Figure 3-9 the Time Between the Beginning of the Last Thermal Head Activation and the Beginning of
Present Thermal Head Activation (W')
3-22
