Epson Stylus CX4905 - Page 76

EPSON Stylus CX4900/CX4905/CX5000/DX5000/DX5050/CX5900/CX6000/DX6000/DX6050 Revision A
OPERATING PRINCIPLES Printer Mechanism 76
2.2.5.1 Capping Mechanism
The Capping mechanism covers the Print Head with the Cap to prevent the nozzle from
increasing viscosity when the printer is in stand-by state or when the printer is off.
 Wi
per with the Cap unit
The wiping operation is controlled by the Carriage Unit movement. This operation
is usually performed with every CL sequence which is to absorb the ink from the
ink cartridge, the ink cavity by the Pump unit. Following figure shows you the
mechanism for the wiping operation.
Figure 2-10. Wiper mechanism
The Carriage Unit moves to the Wiper
setting position on the rightmost
position of the Cap Frame with keeping
the Cap covered.
In this time, the hook of the Slider Lock
Lever is latched to the dent of the Cap
Frame.
When the wiping operation is
finished and the Carriage unit
moves further to the left side,
the hook of the Carriage unit
hits to the Slider lock lever.
In this time, the Slider lock
lever is released and the Cap
slider returns to the bottom
position completely.
(The broken line is the
position of the Carriage unit
& the Slider lock lever just
before being released.)
When the Carriage Unit moves to the
left side from the Wiper setting
position, the Cap Unit is pulled back
by the tension force of the
Extension
Spring 0.788
.
In this time, the Cap Unit is
automatically set to the wiping
position because the hook on the
Slider Lock Lever is latched to dent
of the Cap Frame. And, the wiping
operation is performed according to
the Carriage Unit movement.
Wiping position
Step 1
Capping position (CR home position)
When the Carriage Unit is in the
home position, the hook of the Slider
Lock Lever is not latched to the dent
of the Cap Frame.
In this time, the protrusion of the Cap
Slider Lever does not reach the
rightmost position of the Cap Frame.
Step 2
Step 3 Step 4
Protrusion
Latched
Latched
Protrusion of the Carriage Unit
Not latched
Released
Wiper setting position
Released position (Bottom position)