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Rev. 2.00
- 132 -
SRP-275
8-3 Detection mechanism
Each of the detection component mechanism in the SRP-275 and their corresponding function are listed
below. Detailed explanations of each of the detection mechanism are provided in this section.
Detection mechanism
Function
Home position
Paper near end
Paper end
Rear cover open
Auto cutter home position
Initial setting of SRP-275
Detection of presence/a little presence of paper roll
Detection of presence/absence of paper roll
Detection of the rear cover open/close
Initial setting of Auto cutter
Switch-paper end
Switch-paper near end
Switch-paper near end-W
Switch-cover rear open
Cover base
Cover middle
Auto cutter
Home position sensor
Home position sensor
8-3-1 Home position detection mechanism
The home position detection mechanism consists of the detection plate at the left side of the
Carriage head
ass’y
and the home position sensor at the left side of the
Frame-main
. It determines the home position,
identifies the head carriage position, and detects
Carriage head ass’y
operation errors.
The home position sensor consists of an LED and photo transistor. When the
Carriage head ass’y
moves,
the detection plate passes between the LED and photo transistor and blocks the optical axis of the photo
transistor, changing the output level of the photo transistor.
Head carriage detection plate
+5V
GND
Detection signal
Photo transistor
LED
Содержание 2 COLOR THERMAL PRINTER SRP-275
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Страница 75: ...Rev 2 00 75 SRP 275 4 5 3 Serial Interface Diagram RS 232C ...
Страница 76: ...Rev 2 00 76 SRP 275 4 5 4 Parallel Interface Diagram IEEE 1284 ...
Страница 77: ...Rev 2 00 77 SRP 275 4 5 5 USB Interface Diagram Universal Serial Bus ...