Operational Sequence Of Ink Mechanism - Epson SQ-1170 Service Manual

2.1.4.7 Operational Sequence of Ink Mechanism

Ink Mechanism comprises of various steps of operation.
The following are some of the basic steps of operation.
Ink flushing operation
In this operation, the printhead is moved to the position where the cap covers the nozzles (the refresh
position) and then ink is injected from all the nozzles toward the cap.
Negative pressure release operation
This operation is performed to change of inside the cap air pressure from negative pressure to normal
pressure.
In this operation, the carriage is moved to the negative pressure release position, where the printhead
is closely contacted against the cap with the air valve opened. (The negative pressure inside the cap
is thus released.) Then the pump operates for 5 seconds to make the ink inside the cap flow toward
the wasted ink drain tank.
Cleaner blade operation-1
This operation is performed to remove dust, etc. from the printhead. Refer to 2.1.4.4 for the details.
Cleaner blade operation-2
This operation is performed to remove dust, etc. from the printhead following the ink charge operation.
It consists of the cleaner blade operation- and 3000-pulse ink flushing operation that follows.
Cleaner blade operation-3
This operation is petformed to remove ink mist from the printhead. It consists of the l-second ink
discharge operation and the cleaning blade operation- that follows.
Rubbing operation
This operation is performed to remove head preserving liquid, ink, or dust which is heavily adhered
to the surface of the printhead. Refer to 2.1.4.4 for the details.
The above operations are performed when the carriage is located at the position indicated below. '.;;
Cap
Left Side
I
I
Flushing Area
Figure 2-35. Operational Sequence of ink Mechanism and Carriage Position
Cleaner
Carriage
/
,
Printing Area
Negative Pressure
Release Area
2-22
Platen
/
/
/
'
I
I
I
I
Bottom Side
I
Right Side