Epson Stylus Photo R800 Service Manual page 26

EPSON Stylus Photo R800
The following shows the Pump Unit operating principle.
Cap Unit Side
To Waste ink pad
Figure 2-10. Pump Unit Operating Principle
Ink suction
1. The Pinion Gear of the Pump Motor rotates in the CW direction.
2. The Roller turns and simultaneously presses the tube.
3. Ink is fed from the Cap Unit toward the Waste Ink Pad.
Pump release
1. The Pinion Gear of the Pump Motor rotates in the CCW direction.
2. The Roller moves away from the tube and releases the tube.
3. Ink is not sucked.
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OPERATING PRINCIPLES
2.2.5.3 Cap Unit
The Cap Unit is designed to bring the Cap into close contact with the Print
Head surface and suck ink by the driving force of the Pump Unit to secure air
tightness in the Cap.
When the printer is in a standby status or its power is OFF, the Cap Unit
prevents the ink from thickening.
Ink is fed to the Waste Ink Pad in the following path.
⇒
Ink Cartridge
The following diagram shows the outline of Cap Unit operation.
Print Head
Printer Mechanism
⇒ ⇒
Head Cavity Cap Waste Ink Pad
Carriage Unit
Cap
Slider cap rises to perform
capping.
Figure 2-11. Capping Mechanism
Revision A
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