Operating Principles - Epson WF-C5790 Service Manual

EPSON WF-C5790/WF-C5790a/WF-C5710/ET-8700/WF-C5210/WF-C5290/WF-C5290a

3.3.5.2 Operating principles

OVERVIEW
The inksystem mechanism of this product employs the direct acting type
consists of the carriage lock mechanism, wiper mechanism, capping
mechanism, pump mechanism, and venting valve (valve mechanism).
All the mechanisms are driven by the pump motor. The drive force of the pump
motor is transmitted to each mechanism via transmission parts, such as the
pump-drive compound gear, clutch gear, intermittent gear, cam, and drive
lever.
Additionally, this product utilize a maintenance box (waste ink pad) that retains
waste ink from the cap, with which users can replace ink themselves.
Carriage lock mechanism
Valve mechanism
Wiper mechanism
Waste ink tray
(waste ink pad)
Figure 3-40. Inksystem Mechanism (Simplified Model)
1. There are two types of the capping: direct acting type and sliding type. In the direct acting type, the cap moves up and
down independently of the carriage and caps the printhead. In the sliding type, the printhead is capped (the cap is
moved up) when the carriage pushes the cap slider.
Configuration and operating principles
Pump motor
1
and
Printhead
Pump unit
Cap mechanism
DRIVE PATH
The ink system mechanism is driven by the Pump Motor. The relationship
Pump mechanism
between the Pump Motor rotational direction and operation of each part is as
follows.
Table 3-22. Pump motor rotational direction and operation of the inksystem
Mechanism
Wiper
Cap
Pump
CR Lock
Venting Valve
a. Rotational direction seen from output shaft
Operating principles
Venting valve Cap
Wiper
Pump-drive compound gear
Figure 3-41. Inksystem Mechanism
Rotational direction of the Pump Motor
CW
Wiping position
Drop
Release
Drop (CR Lock release)
Open
Revision A
Carriage lock lever
Pump encoder sensor
a
CCW
Passing
Rise (capping)
Suction
Rise (CR Lock set)
Close
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