EPSON Stylus CX7300/CX7400/DX7400/NX200/TX200 series/SX200 series/Stylus CX8300/CX8400/DX8400/NX400/TX400 series/SX400 series Revision C
OPERATING PRINCIPLES Overview 53
Confidential
2.1.6.3 Wiping Mechanism
The wiping mechanism is activated by the capping operation. The mechanism moves the wiper into- and out-of position for cleaning the head using the PF motor drive force that is
transmitted via the cam of the clutch-equipped combination gear.
Figure 2-17. Wiping Mechanism
Non cleaning state
(clutch disengaged)
PF motor CW rotation: Moves the Wiper Upward
PF motor CCW rotation: Moves the Wiper Downward
Cap SliderCam
Clutch-equipped combination gear
Groove of
cam (1)
Wiper protrusion
Cap Slider protrusion
Groove of
cam (1)
Wiper protrusion
When the cap slider pops up, its protrusion is disengaged from the groove of cam (2).
Therefore, the clutch is engaged causing the cam to rotate together with the combination
gear.
The clockwise rotation of the PF motor rotates the cam in clockwise direction
to move the wiper upward to clean the head.
The counterclockwise rotation of the PF motor rotates the cam in counterclockwise
direction to move the wiper downward, which is out-of position for cleaning.
Groove (2) of the cam is designed so that the cap slider
protrusion cannot be set into the groove unless the wiper is
moved downward. This prevents the slider protrusion from
being engaged with the groove when the slider is moved
downward without the wiper moved downward.
Groove of
cam (2)
Cap Slider protrusion
Wiper
protrusion
Wiper
protrusion
In the non-cleaning state, the cap slider protrusion secures the cam and the clutch of
the combination gear is disengaged. Therefore, the PF motor drive force is not
transmitted to the cam.
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