OPERATING PRINCIPLES
Each sensor is described below.
1. Front and rear paper end sensors
‰Detection form: | Photo interrupter |
‰Output form: | Open collector (pulled up to 10 K ohms resistor) |
‰Logical: | Paper present: LOW |
| Paper out: HIGH |
2. Top paper end sensor (to detect the TOF position) | |
‰Detection form: | Photo reflector |
‰Output form: | Open collector |
‰Logical: | Paper present: LOW |
| Paper out: HIGH |
3.Paper jam sensor ‰Detection form: ‰Output form: ‰Logical:
‰Supplement:
Magnetic transistor
Rectangle wave (1 channel, TTL level) Paper feed: Level changes continuously. Paper jam: Level remains the same.
The magnetic transistor is attached to the tension roller on the paper tension unit.
4. Tractor select sensor
‰Detection form: | Micro mechanical switch |
‰Logical : | Front tractor: LOW (closed) |
| Rear tractor: HIGH (open) |
5. Pull tractor sensor |
|
‰Detection form: | Micro mechanical switch |
‰Logical : | Pull tractor installed: LOW (closed) |
| Pull tractor not installed: HIGH (open) |
6. Carriage encoder sensor | |
‰Detection form: | Photo reflector |
‰Transaction: | Rectangle wave, A and B phases respectively. |
7. Platen Gap encoder sensor | |
‰Detection form: | Photo interrupter |
‰Output form: | Rectangle wave, 2 channel |
‰PG ability: | T = 0.015 mm / pulse |
‰Available range: | 0 < T < 0.7 mm |
8. Platen Gap home position sensor | |
‰Detection form: | Micro mechanical switch |
‰Logical:: | Home: LOW (closed) |
| Out of home: HIGH (open) |
9.Ribbon jam sensor ‰Detection form: ‰Function: :
10.Cover open sensor ‰Detection form: ‰Logical::
Photo interrupter
The main board monitors signal change during ribbon feed.
Micro mechanical switch
Cover closed: LOW
Cover open: HIGH
11.Printhead temperature sensor (uses a thermistor) The thermistor is included on the printhead.
12.Head fan temperature sensor (uses a thermistor) The thermostor is included on the head fan.
Rev. B |
