Logic Seeking - Epson LQ-1050 Technical Manual

2.3.7.2 Logic Seeking

The logic seeking maximizes operation speed of the bidirectional printer. It does away with the necessity
to start printing from the home position (left position) after each line of printing, but permits printing
from any position after a line feed. Figure 2-51 shows the sequences of logic seeking.
LINE 1
Home Posltlon
1-3 Printing of the 1st line
4-5 Logic seeking
6 Paper feed
Printing of the 2nd
7 - 9
10
Paper feed
. 11-12 Printing of the 3'rd line
Operation
a) Upon receive in print data "EPSON" for a line from the host computer, the printing is performed
in an action of @ to @ with the carriage and printhead moving to position Q.
b) The CPU, receiving the next data from the host computer, analyzes it and determines the acceleration
start position of the carriage.
c) In an action of ~ to ~, the carriage is moved to position Q, here paper feed is operated ~. Then
the carriage goes through acceleration printing and deceleration ~,~,~ to position ~, next paper
feed is operated ~.
d) In an action of ~ to ~, acceleration, printing, and deceleration are performed ~.
E P S O N
T E R M INA L
I I 1 I I
1 2 3 4 5
Printing Area
Acceleration Area
line
Fig. 2-51. logic Seeking
7
h
PR
I I
I I
10
2-51
Carriage Operatian
(Constant Speed)
Carriage Operation
\
(Acceleration/Deceleration )
Paper Feed Operation
This prlntlng mode Is Draft
@
I
15
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