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參數(shù)資料
| 型號(hào)： | LTPH245 |
| 廠商： | Seiko Instruments Inc. |
| 英文描述： | LINE THERMAL PRINTER MECHANISM TECHNICAL REFERENCE |
| 中文描述： | 熱敏打印機(jī)芯線技術(shù)參考 |
| 文件頁數(shù)： | 32/64頁 |
| 文件大小： | 841K |
| 代理商： | LTPH245 |
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3-19
3.6 CONTROLLING THE HEAD ACTIVATION (DST) PULSE WIDTH
3.6.1 Calculation of Head Activation Pulse Width
Head activation pulse width is calculated using the following equation (3).
To execute high quality printing using the printer, the value that is calculated using the following equation
(3) must be adjusted according to the environment the printer is used in. Calculate each value used
according to the steps in
Sections 3.6.2
to
3.6.7
and control them so that the pulse width with the t
value obtained by substituting each value into the equation (3) is applied.
Printing using too high of a voltage or too long of a pulse width may shorten the life of the thermal head.
Equation (3):
t :
E :
V :
R : Head resistance (
)
C : Head pulse term coefficient
D : Heat storage coefficient
Head pulse width (ms)
Standard applied energy (mj)
Applied voltage (V)
See
Section 3.6.2
.
See
Section 3.6.3
.
See
Section 3.6.4
.
See
Section 3.6.6
.
See
Section 3.6.7
.
3.6.2 Calculation of Applied Energy
Applied energy should be in accordance with the temperature of the thermal head and the environment
the printer is used in.
The thermal head has a built-in thermistor. Measure the temperature using thermistor resistance.
Standard applied energy is based on a temperature of 25
°
C. Calculate the printing energy using
equation (4) and the temperature coefficient.
Equation (4):
E= (0.260 - T
C
×
(T
X
- 25) )
T
X
: Detected temperature using the thermistor (
°
C)
1
T
C
: Temperature coefficient
0.003373
1
The thermistor resistance value at T
X
(
°
C). See
Section 3.6.8
.
E
×
R
t =
×
C
×
D
V
2
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