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Part 4: Technical Reference
5.1.8 Head temperature sensor
Located inside the print head in the BJ cartridge, this sensor detects the head
temperature so that the printer can stop printing when this sensor detects an
abnormal temperature rise in the head as a head temperature abnormal error. The
diode sensor output varying with the head temperature is detected as a varying
voltage, so the incoming analog values are converted into digital values by the built-in
A/D converter.
5.2 Other Detection Functions
This printer features other detection capabilities as follows:
5.2.1 Waste ink amount detection
Discharged ink from maintenance jetting to keep the print head in good working
condition, and sucked ink as a result of cleaning is absorbed into the waste ink
absorber. If more ink has been discharged than can be absorbed into the absorber,
the ink may leak inside the printer. This waste ink amount detection function is
provided to prevent ink leakage by estimating the waste ink absorber's capacity to
absorb so that it can detect the ink-full condition. The printer calculates the amount
of waste ink discharged by maintenance jetting and cleaning, based on the ink dot
counter reading for the discharged ink, so that when the estimated waste ink volume
reaches 95% of the waste ink absorber's capacity, allowing for evaporated ink, a waste
ink warning will be issued on power-up. If this condition continues until the
estimated waste ink amount reaches 100%, a "Waste Ink Full" error will be issued.
5.2.2 BJ cartridge detection
The detection signals from the index unit, built into the print head heater board,
detect the installed BY cartridges. For more, refer to
identification (Page
4-24).
4-44
Part 4: 3.2.3 d) Cartridge
BJC-6000
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