Paper Feed Motor Control Circuit; Auto Paper Loading/Ejecting Operation - Epson LQ-1050 Technical Manual

REV.-A
2.3.7.6 Home Position Sensor
The home position (HP) sensor is used for detecting the carriage home position. The details are described
in below.
Detection System:
Output System:
Signal Status:
Carriage position
Home position
Not home position
Circuit:

2.3.8 Paper Feed Motor Control Circuit

This printer uses a PM stepper motor, and the
phase excitation system is employed for this
constant voltage of + 35V DC.

2.3.8.1 Auto Paper Loading/Ejecting Operation

This printer has auto paper loading/ejecting system. These operations are shown in Figures 2-59
through 2-64.
Photo-electric conversion
Open-collector
See Table 2-22.
Table 2-22. HP Sensor Signal Status
See Figure 2-58.
FLUG
CN 8
r
I
I
I
I
I
I
I
I
Fig. 2-58.
PAO (1 pin) of CPU
High
Low
+5
+ 5
R71 I
c
HP Sensor Circuit
minimum paper feed pitch is 1/180 inch. Only the 2-2
mechanism, and the paper feed motor is driven by a
2-58
C P U
)
PA O