Chapter 2
Printhead
Nozzle unit
Head management
sensor unit
2.5.3 Carriage system
Linear encoder
Carriage cover sensor
Head relay PCB
Multi sensor
Linear scale
Lift cam sensor
Carriage HP sensor
Carriage cover sensor
The
When the carriage cover is closed, the sensor light is shielded by the sensor arm, enabling the sensor to detect that the carriage cover is closed.
Carriage HP sensor
The
Installed on the right side plate of the printer, the sensor detects an edge of the carriage home position on the carriage unit under carriage unit under carriage move- ment control.
The printer establishes the carriage home position from the position at which its edge is detected as a reference position.
Linear encoder
Mounted on the back of the carriage, the linear encoder detects the position of the carriage from a slit in the linear scale during its movement.
Lift cam sensor
A
Ambient temperature sensor
The
The resistance of the thermistor that varies as a function of temperature changes in the printer is transmitted to the main controller via the carriage relay PCB. The ambient temperature is used to help calibrate the head temperature sensor and detect abnormal ambient temperatures.
Head temperature sensor
The head temperature sensor detects the temperature of the printhead.
The printhead temperature is transmitted to the main controller via the carriage relay PCB.
The printhead temperature is used to help control the head drive and detect abnormal printhead temperatures.
Printhead contact detection
The printhead contact detects the status of printhead installation by electrical means.
The contact detects the status of contact from voltage changes in the flexible cables on the carriage side that come into contact with two terminals of the printhead with remote contact surfaces, the power terminals and GND terminal.
