Table of Contents
Advertisement
REV.-A
2.4.3.6 Brushing Mechanism
Rotation of the brush
removes
any dust lodged on the front surface of the head.
The cleaner support, to which the cleaner is attached, is linked to the cap support, and therefore
reciprocates together with it. (See Figure 2-78.)
The cleaner is rotated by the cleaner
drive
gear, which is driven by the planetary gear, which is driven
by the motor. The cleaner rotates only when the pump motor is moving forward.
Brush gear
Figure 2-80. Cleaner Movement
Clearner
2.4.3.7 Valve Mechanism
The
valve
set is tied to the head cap by tubes; activation by the solenoid opens the
valve-side
tube tops
(in the absence of activation, the
valves
are closed).
When the
valve
is closed, air is shut in between the
valve
and the cap; therefore, if the pump is operated
while the cap is firmly attached to the front surface of the head, ink will flow into the pump. When the
valve
is open, on the other hand, ink cannot flow under any circumstances, and regardless with whether
or not the pump is operating.
When ink is being sucked in, the inside of the cap is being subjected to negative pressure; a relatively
large force is therefore required to pull the cap away from the head. To release this condition, the
valve
is opened, allowing air to enter. Valve opening also releases air from the cap, enabling firm attachment
between cap and head, and preventing the drawing back of ink at the nozzle top due to temperature
change.
Air flow is enabled when a gap is created by the
movement
of the iron core driven by the solenoid.
Valve Solenoid Specification
Type:
DC Solenoid
Voltage:
24VDC± 10%
Coil Resistance:
80 ohms ± 5% (at 20°C)
Draw Force:
at least 130g (at 20°C, 21.6V, with 1mm stroke)
2-66
Advertisement
Table of Contents
