Bidirectional Line; Unidirectional Line - Epson FX Series User Manual

Look carefully at your printout or at the version we show as Figure
6-1. See how the line seems to quiver? Now turn on Unidirectional
printing to see how much difference it makes. Add line 10 and RUN
the program again:
10 LPRINT CHR$(27)"Ul"
CHR$(27) "Ul' turns on the Unidirectional printing whose results we
show as Figure
6-2,
Did you watch the print head as it printed? In every row it moved
from left to right instead of alternating directions as usual.
You can get the same effect for one line at a time by using the com-
mand
CHR$(27)"<"
84
Figure 6-1. Bidirectional line
Figure 6-2. Unidirectional line
and
CHR$(27)
. This command causes a carriage return with no
"U0" turns it off.