When the printhead fixer lever is closed, the sensor arm shields the sensor light, causing the sensor to detect the closed state of the printhead fixer lever.

Carriage HP sensor

The photointerrupter-based carriage HP sensor detects the home position of the carriage.

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 sensor

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 photointerrupter-based sensor. After the sensor light is shielded by the flag, the lift motor is driven by a predetermined number of pulses to regulate the separation

between the printheads and platen automatically.

Ambient temperature sensor

The thermostat-based ambient temperature sensor mounted on the head relay PCB detects the ambient temperature to which the carriage is exposed.

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

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