Wiping Mechanism - Epson Stylus C110 Service Manual

EPSON Stylus C110/C120/D120

2.2.4.3 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.
Non cleaning state
(clutch disengaged)
Groove of
Wiper protrusion
cam (1)
Cap Slider 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.
PF motor CW rotation: Moves the Wiper Upward
Wiper
protrusion
The clockwise rotation of the PF motor rotates the cam in clockwise direction
to move the wiper upward to clean the head.
OPERATING PRINCIPLE
Cam Cap Slider
Clutch-equipped combination gear
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) Groove of
Figure 2-16. Wiping Mechanism
Printer Mechanism Operating Principles
Cleaning state
(clutch engaged)
Groove of
Wiper protrusion
cam (1)
Groove of
cam (2)
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.
PF motor CCW rotation: Moves the Wiper Downward
Wiper
protrusion
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.
Revision B
Cap Slider protrusion
32