Ink Sequence - Epson Stylus Photo 720 Service Manual

EPSON Stylus Photo 720 / EPSON Stylus Photo EX3

2.1.8 Ink Sequence

Initial ink charge
o
After the product is purchased and the printer is turned on for the first time, the
printer performs the initial ink charge and charges ink inside the head cavity.
When the initial ink charge is completed properly, the printer releases the flag
inside the EEPROM and no initial ink charge will be performed next time the
power is turned on. Stylus Photo 720 / Stylus Photo EX3 takes 85 seconds to
complete initial ink charge sequence.
Manual cleaning
o
When the dot missing by printhead is occurred, Stylus Photo 720 / Stylus Photo
EX3 provides three types of manual CL to clean air bubbled or clogged ink with
viscosity or foreign substances.
The following manual CL sequences can be executed by panel operation or from
the printer driver utility.
CL1
n
- Ink absorption (Black Ink: 0.096ml, Color Ink: 0.48ml)
-Wiping operation (Wipes nozzle plate by the rubber part on the right half of the
wiper.)
-Flashing operation (Prevents color from mixing. Stabilizes ink surface inside the
nozzle)
CL1'
n
- Ink absorption (Black Ink: 0.24ml, Color Ink: 1.19ml)
-Wiping operation (Wipes nozzle plate by the rubber part on the right half of the
wiper.)
-Flashing operation (Prevents color from mixing. Stabilizes ink surface inside the
nozzle)
Operating Principles
CL2
n
- Ink absorption (Black Ink: 0.21ml, Color Ink: 1.059ml)
-Wiping operation (Wipes nozzle plate by the rubber part on the right half of the
wiper.)
-Rubbing operation (Wipes nozzle plate by the felt part on the left half of the
wiper.)
-Flashing operation (Prevents color from mixing. Stabilizes ink surface inside the
nozzle)
The above mentioned manual CL is executed by performing nozzle check pattern and
manual CL alternately. The cleaning order is CL1
print is executed between each manual CL, only CL1 is to be performed. Like previous
models, when the power is turned ON, the printer executes power on CL automatically
according to power OFF period and the counter value of the cleaning timer. Power on
CL sequence is designed to prevent the ink viscosity and dot missing caused by foreign
substances. According to each counter value, certain amount of ink (Black: max.
0.12ml, Color: max. 0.58ml) is consumed by power on CL when the power is applied.
Overview
Revision A
→ → →
CL1' CL2 CL1. If no test
41