EPSON Stylus Photo R800
Revision A
OPERATING PRINCIPLES
Printer Mechanism
27
The following shows the Pump Unit operating principle.
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.
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
⇒
Head Cavity
⇒
Cap
⇒
Waste Ink Pad
The following diagram shows the outline of Cap Unit operation.
Figure 2-11. Capping Mechanism
Cap Unit Side
To Waste ink pad
Slider cap rises to perform
capping.
Print Head
Cap
Carriage Unit
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