Canon iPF5000 - imagePROGRAF Color Inkjet Printer, Service Manual

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Chapter 2
2-64
2.5.3 Carriage system
0013-4338
iPF5000
F-2-68
Multi sensor
The photo-reflection-type multi sensor is composed of four LEDs (red, blue, green and infrared) and two light-sensitive sensors. It detects the leading edge, skewing,
and width of media and is used for adjustment of the registration, and head height.
During head adjustment, the light reflected by the infrared LED is detected by two light-sensitive sensors to calculate the head height from the difference between
the measurements.
F-2-69
Linear encoder
When the carriage modes, the linear encoder located at the rear of the carriage reads the slits on the linear encoder to detect the carriage position.
Lift cam sensor
This is a photo-interrupter-type sensor. The lift motor is driven by a predetermined number of pulses received after blocking of the sensor light by the flag, thus
controlling the heights of the head and platen.
Environmental temperature sensor
The environmental temperature sensor installed on the carriage PCB detects the temperature around the carriage.
The resistance of the thermistor that changes with the temperature inside the printer is reported to the main controller via the carriage PCB.
The environmental temperature is used to calibrate the head sensor and to detect abnormal head temperatures.
Head temperature sensor
The diode-type head temperature sensors installed at the top and bottom of the printhead nozzle unit are used to detect the head temperature.
Lift cam sensor
Linear encoder sensor
Multi sensor
Platen
Media
Infrared LED
LED(red) LED(green) LED(blue)
Infrared sensor