參數(shù)資料
型號: 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): 43/64頁
文件大小: 841K
代理商: LTPH245
3-30
3.8 PLATEN POSITION SENSOR
The printer has a platen position sensor to detect whether or not the platen block is set.
The platen position sensor is a switch type sensor shown in Figure 3-13. The platen position sensor
switch is closed when the platen block is set and is open when the platen block is released.
Design the control circuit so that the motor is not driven and the thermal head is not activated when the
platen block is open by detecting output of the platen position sensor.
3.8.1 General Specification
Maximum rating: DC30V, 0.5A
Connection resistance: 200 m
or less
3.8.2 Sample External Circuit
Figure 3-13 Sample External Circuit of the Platen Position Sensor
Note that there is a time lag between operation of the platen position sensor and
completion of pressurization to thermal head.
To prevent a malfunction due to chattering of the switch, be sure to use the capacitor
shown in Figure 3-13.
Switch
GND
CPU Port
V
dd
(5v)
R=100k
HS
GND
C=0.1
μ
F
* When the platen block is open
LTPH245
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