Epson LQ-2550 Technical Manual page 67

REV.-A
Figure 2-16 shows the basic operations of the paper release mechanism, and Table 2-24 lists the switch
Paper Release
(a) Tractor
Lever State
ON
RL
Solenoid
OFF
PF
Hold
Motor
Close
RL
sensor
Open
Switching from Tractor Feeding to Friction Feeding
When the RL solenoid is energized, the RLtrigger is pulled, and the clockwise rotation of the PF motor
is transmitted as follows:
PF motor + PF transmission gear + Tractor transmission gear+ Sun gear + RL planetav gear A +
Paper release lever
The RL sensor confirms the switching operation. Subsequently, the PF motor is driven counterclock-
wise so as to allign the RL planetary lever and RL trigger.
2 Switching from Friction Feeding to Tractor Feeding
When the RL solenoid is energized, the RL trigger is pulled, and the counterclockwise rotation of
the PF motor is transmitted as follows:
PF motor + PF transmission gear + Tractor transmission gear + Sun gear
The RL sensor confirms the switching operation. Subsequently, the paper feed motor is driven
clockwise so as to align the RL planetary lever and RL trigger.
Table 2-24. Paper Feeding Method Switch Timing
(b) Tractor+ Friction
1
1
1
1
1
t
1
1
I
1
(d) Friction + Tractor +a)
(c) Friction
,
1
I
I
I
I ,
1
1
1
1
1
1
I
1
I
1
1
1
1
1
1
2-20
. .-
1
1
1
1
1
1