Epson Stylus Pro 5000, Service Manual, Page: 55 / 780

Stylus Pro5000 Chapter2 Operating Principles
Rev.A
2-16
2.1.1.10 Ink Engage/Disengage Mechanism
The ink disengage mechanism for Stylus Pro5000 is called
D/E(disengage/engage mechanism). This determines to conveys the motive
power from paper load/eject line to the pump line for absorbing ink or not.
Figure 2-17 shows the exterior view of pump frame.
Slider
Pump Unit
Figure 2-17. Exterior View of Pump Frame
[Explaining Figure2-17]
The major parts mounted on the pump frame above consists of various
gears, which determines whether to convey the motive power from
pump/ASF motor, cap unit and pump unit to the paper load/eject line gear
train, or to the pump only. Out of these gears, the gear train for engaging or
disengaging the motive power is the same as the one of Stylus Color 800.
Return Spring 2
Planetary Gear 1
Return Spring 1
Planetary Gear 2
Semicircle Cam Gear2
Transmission Gear for
pump driving
Figure 2-18. Gear Train Condition at transmitting power to the Pump
[Explaining Operation1]
Figure 2-18 shows the condition that motive power of pump/ASF motor is
transmitted only to the pump unit. When the printer performs the pump
operation, the planetary gear 1 moves to left direction, since the carriage
collides with the slider, as it is shown in the figure2-17. While the carriage
collides with the slider, the return spring 1 on the same axis, which the
planetary gear 1 is also on, is compressed. When this spring expands, it
moves the planetary gear 1 to left direction. In this condition, when the
pump/ASF motor rotates forward, the motive power charged on the
planetary gear 1 is transmitted to the semicircle cam gear. Then, as this
cam gear goes up, the planetary gear 2 is pushed out to the notch of the
right frame. (Refer to Figure2-19)