Epson Stylus Pro 5000 Service Manual page 59

Stylus Pro5000
Cam for driving Paper Feed Support Roller
Transmission Gear 1
Transmission Gear 2
Cam Gear
Figure 2-27. Transmitting motive power to Paper Feed Support Roller
[Explaining the operation(Con.)]
Figure2-27 shows transmission of motive power, which the motive power of
pump/ASF motor is conveyed to the paper feed support roller.
The cam gear must rotate, as a condition to set or release the paper feed
support roller. However, while the sub roller is rotating in reverse, the cam
gear loses motive power and stops, after setting the paper feed support
roller in the friction condition. Also, while the pump/ASF motor rotates
forward, since the planetary gear in the figure2-26 does not engage with the
Sub Roller Driven gear, the motive power is not transmitted to the sub roller,
and the paper feed support roller is set in the release condition by rotating
the cam gear clockwise. The table 2-5 shows the relation between the
rotation of pump/ASF motor and operation of each mechanism.
Rev.A
Sub Roller
Paper Feed Support Roller
Table 2-5. Relation between Rotational Direction of Motive Power and
Gear Train Changes
Rotational Sub Roller
direction for condition
Pump/ASF motor
CW(right) rotation Not operate
CCW(left) rotation Left rotation
(Paper
transportation)
Chapter2 Operating Principles
Cam Gear PF Support
condition Roller
Right rotation Release
(It stops after condition
the certain
rotation)
Left rotation Friction
(It stops after condition
the certain
rotation)
2-22