Epson 440 User Manual download pdf (Page 54)

EPSON Stylus Color 440/640/740 Revision A

Chapter 2 Operating Principles 54

The table below shows PF/Pump motor rotational direction and pump

system operation.

Table 2-7.

Relationship between Pump Motor Rotation and it’s Work

Refer to Figure 1-13 in the right column which shows the pump

operations at clockwise and counterclockwise rotation.

In the ink absorptive operation such as cleaning, flushing and initial ink

charge except for printing operation, ink in the ink cartridge drains to the

waste ink absorber(pad) through the cap by the pump unit drive. In case

of printing and flashing drive, ink is popped out by the PZT in the print

head, but in case of absorptive operation such as cleaning and initial ink

charge, ink absorption is performed only by the pump drive without PZT

drive after the head surface is adhered to the cap. The next page

explains cap mechanism and relation between printer operation and

cap.

Figure 2-13. Pump Roller Rotation and it’s Operation

PF/Pump motor rotational direction Pump unit operation

Clockwise (CW)

forward rotation

1)Release from the Pump pressure welding

2)Head cleaner reset

3)Carriage lock reset

Counterclockwise (CCW)

backward rotation

1)Rotation towards pump pressure welding

2)Head cleaner set

3)Carriage lock set

Tube pressured

Tube released

CW Rotation

CCW Rotation

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Epson 440 User Manual Page 54