Cleaning Mechanism - Epson 3800 - Stylus Pro Color Inkjet Printer Service Manual

EPSON Stylus Pro 3800/3800C/3850

2.4 Cleaning Mechanism

The cleaning mechanism consists of a pump cap unit and a waste ink pads
(maintenance cartridge).
† Pump Motor
The pump motor drives the cap unit, pump, head cleaner, and carriage lock. The table
below shows the operation of each mechanism depending on the rotational direction of
the pump motor.
Table 2-6. Pump Motor Functions
Mechanism CCW *
Cap Unit Open (Uncapping)
Pump Pump release
Wiper reset
Head Cleaner
(back to the home)
Carriage Lock Unlock
Note *: The rotation direction as seen from the top of the unit.
Pump Motor
Combination Gear, 15.5, 9.5
Spur Gear, 26.5
Spur Gear, 13
Spur Gear, 21.5
Intermittent Gear, 21.5
Combination Gear, 16, 11.5
Combination Gear, 13.5, 10
Head Cleaner
Figure 2-11. Drive Transmission Path
OPERATING PRINCIPLES
CW *
Close (Capping)
Pump suction
Wiper set
(moves to the wiping position)
Lock
Pump
Cap Unit Carriage Lock
Cleaning Mechanism
† Cap Unit/Carriage Lock
The pump motor moves the cap unit up and down. The cap unit goes up to seal the
print head during cleaning and stand-by. Carriage lock operates in synchronization
with the cap unit. When the carriage unit moves to the home position, carriage lock
moves up together with the cap unit and lock the carriage unit.
Cap Unit
Carriage Lock
Spur Gear, 21.5
Intermittent
Gear, 21.5
Combination Gear, 15.5, 9.5
Figure 2-12. Cap Unit/Carriage Lock Mechanism
Revision A
Cap unit moves up Cap unit moves down
(capped, locked) (uncapped, unlocked)
Spur Gear, 13
Pinion Gear
(Pump Motor)
Spur Gear, 26.5
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