Epson LQ-2550 Technical Manual page 70

Switching operations are described below.
Paper Loading
Lever State
ON
LD
Solenoid
OFF
PF
Hold
Motor
Close
LD
Sensor
Open
Switching from Close to Open
When the LD solenoid is energized, the LD trigger is pulled and the clockwise rotation of the paper
feed motor is transmitted as follows:
PF motor + PF transmission gear + Platen gear + LD planetary gear -+ LD gear A + Paper loading
lever + Paper holding lever (= Paper holding roller)
The LD sensor confirms the switching operation.
Subsequently, the PF motor is driven clockwise/counterclockwise so as to take up slack in the paper.
2. Switching from Open to Close
When the LD solenoid is energized, the LD trigger is pulled, and the clockwise rotation of the PF motor
is transmitted as follows:
PF motor ~ PF transmission gear+ Platen gear+ LD planetary gear+ LD gear A + LD gear+ Paper
loading lever + Paper holding lever (= paper holding roller)
The LD sensor confirms the switch operation. Subsequently, the PF motor is driven clockwise/counter-
clockwise so as to take up slack in the paper.
Table 2-28. Paper Loading Lever Open/Close Timing
(b) Close+ Open
(a) Close
1
1
I
I
I
I
(c) Open
I
I
1
1
I
1
I
I
I
1
1
2-23
(d) Open + Close
1
1
1
I
,
t
1
I
1
1
1
I
1
1
1