Ink System Mechanism - Epson STYLUS COLOR 580 Service Manual

EPSON Stylus COLOR 580

2.1.6 Ink System Mechanism

Ink system mechanism consists of pump unit (include the CR lock lever) and capping
mechanism. Ink system mechanism drives the pump unit that presses cap to the
printhead and ejects ink from ink cartridge, head cavity and cap to the waste ink pad.
2.1.6.1 Pump Unit & Wiper mechanism
The pump unit is driven by PF motor. PF motor drive is always transmitted to the paper
feeding mechanism and pump unit through the following gears. Refer to the Figure
2-14.
PF Motor Pinion Gear (CW)
Combination Gear 8.4, 21.6 (CCW)
9.6, 33.6 (CW) Spur Gear 15 (PF Roller Gear) (CCW)
gear 15 (CCW)
Combination Gear 12.6, 18.4 (CW)
Pump unit)
The Pump unit and Wiper mechanism drives according to the PF motor rotational
direction, as shown in the right table.
Operating Principles
Combination Gear
Spur Gear 34.2 (CW)
Spur Gear 15.2 (CCW)
PF Motor
Combination
Gear 12.6, 18.4
Wiper
CR lock lever
Spur Gear 15.2
Pump unit Cap unit
Figure 2-14. PF motor drive transmission path to the Pump unit
Table 2-4. PF motor rotational direction & Ink System Mechanism
Directions
Counterclockwise (*1)
Clockwise (*1)
(*1): The PF Motor rotational direction = seen from the right side of the printer.
Following figure shows the overview of the pump mechanism operation.
Spur
Spur Gear 15
Star Wheel
(PF Roller)
Spur Gear 34.2
Spur gear 15
(Pump unit)
Combination Gear 9.6, 33.6
Overview
Functions
• Sets the wiper.
• Absorbs ink by the pump unit
• Set the CR lock lever
• Resets the wiper.
Figure 2-13. Pump mechanism
Paper Guide
Roller
PF Pinion Gear
Combination Gear 8.4, 21.6
Revision A
39