3.4.6 Maximum Current Consumption
Since the maximum current consumption may reach the values calculated using equation (2) when the
thermal head is driven, the number of simultaneously activated dots should be determined not to exceed
power supply capacity. Also, allowable current for the cable material and the voltage drop on the cable should
be cared well.
Equation (2):
min
H
SA
P
R
Vp
×
N
=
I
I
P
:
Maximum current consumption (A)
N
SA
:
Number of simultaneously activated dots
Vp
:
Thermal head drive voltage (V)
R
H min
:
Minimum thermal head heat element resistance
162.0 (
Ω
)
3-19