2 - 12
2.6.2
Head Applied Energy Correction
Use the Applied Energy Correction Formula below to correct for when the power
voltage and ambient temperature fluctuation during operation (see sample pulse
width control circuit).
Applied energy correction formula
E =
E
0
(1+
)
V
0
+V
2V
T
0
-T
100
E:
Applied energy (mJ)
V:
FPC terminal voltage (V)
T:
Temperature (
°
C)
E
0
:
Rated energy (mJ)
B head
G head
High sensitive
thermal paper
2.3mJ
2.3mJ
Standard thermal
paper
2.5mJ
2.5mJ
V
0
:
Rated voltage (5.0V)
T
0
:
Room temperature (24
°
C)
2.6.3
Head Activation Pulse Width
To ensure high quality printing with the MTP Series, the thermal head activation
pulse width must be set according to the head drive voltage and the head
resistance.
Pulse width calculation formula
t =
R
E
V
2
t:
Pulse width for applying rated energy (ms)
R:
Head resistance (
Ω
)
B head
G head
A rank
15.3
Ω
17.6
Ω
B rank
14.0
Ω
16.0
Ω
C rank
12.7
Ω
14.4
Ω
E:
Applied energy (mJ)
V:
FPC terminal voltage (V)
Note: Procedure forpulsewidth adjustment
➀
Minimize pulse width.
➁
Activate the thermal head with a checked pattern.
➂
Measure the head terminal voltage by using a synchroscope.
➃
Gradually adjust applied pulse width, which is calculated by
using the pulse width calculation formula.
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Summary of Contents for MTP Series
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