Epson LQ 1050 - B/W Dot-matrix Printer - Page 95

REV.-A
Home Position Seek Operation
The function which moves the carriage to the home position after CPU inputs RESET signal is called
home position seek. This is operated by driving the carriage motor. Figure 2-41 shows the operation
flow and Figure 2-42 shows the phase state of home
position seek.
Q
A
[
Set 2-2 phase excitation
with 2134 PPS
of the CR
\
\
motor.
I 0. 68A
Hold the CR motor until
20-30 ms.
Move the carriage from
right to left 4 steps.
b)
I
No
Decelerate the carriage
until it stops.
Confirm the phase
excitation state
of the
CR motor.
I
Set the phase excitation
state to firmware flag.
I
Figure 2-41. Home Position Seek Operaiton
2-51