Ink Sequence - Epson Stylus C110 Service Manual

EPSON Stylus C110/C120/D120

2.2.5 Ink Sequence

Initial ink charge
When the printer power is turned On first time after purchase, the initial ink charge
is automatically carried out to fill the ink cavity in the printhead with ink. The
initial ink charge flag in the EEPROM is cleared when the initial charge is
completed successfully. Stylus C110/C120/D120 requires about 120 seconds at
maximum for the initial ink charge. If the power is turned Off during the process,
the printer automatically runs a CL3 at the next power-on.
Manual Cleaning
Stylus C110/C120/D120 offers three types of manual head cleaning (CL1, CL2,
and CL3) that can be run from the control panel. They delete air bubbles in ink,
clear nozzle clogging, or to eject foreign materials.
CL1, CL2, and CL3 are performed in that order when the cumulative print time
has not reached 9 minutes regardless of the number of print paths counted since
the last CL. When 9 minutes has reached or exceeded, only CL1 is executed.
In the case that any of the ink cartridges has almost run out or completely run out
of ink, the LED flashes or light and the manual cleaning is disabled.
Timer Cleaning
Like the previous printers, this printer does not have lithium battery which is used
for the backup power source for Timer IC. So, this printer manages the printer off
period or cleaning cycle by using the following method.
The printer driver sends the timer command (time data) to the printer before
printing. The command is generated based on the PC's timer and it consists of
year, month, date, hour, minute and second. As soon as the printer receives the
timer command, the printer stores the command in the EEPROM and compares it
with the latest CL time which has been stored in the EEPROM. When the time
difference exceeds the predetermined time period, the printer automatically runs
the timer cleaning and stores the date and time of the cleaning in the EEPROM.
Flushing
The following two types of flushing is carried out automatically.
Pre-printing flushing
Reduces viscosity of ink inside the nozzles before starting printing.
Periodic flushing
Reduces viscosity of ink inside the nozzles during printing.
OPERATING PRINCIPLE
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Printer Mechanism Operating Principles
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