Microscopic Line Spacing - Epson FX-80 User Manual

Also notice that the lowest valid line spacing is 0 dots (instead of 1
as in the MX printers). This can be terrific for extensive overstrikes on
a line. Make these changes to your program:
2~
FOR
X=~
TO 4
I
Change 24 to 4
3~
LPRINT
TAB(6*X);"STAIR";CHR$(27)"A"CHR$(~);"STEPS"
35
I
TRS Model I users see Appendix I
STAIR
ST~~R STA~B ST~~8 STH~8
STEPS
Microscopic line spacing (nI216")
The reason for emphasizing 72nds of an inch is that the distance
between the centers of any two pins on the print head is 1172 of an
inch. So these line spacing commands are simply telling the printer
just how many dots to space between the lines.
There is also a way to space at smaller intervals than 72nds. Using
an <ESC> "3" will set the spacing to increments of 216th of an inch. A
216th of an inch is one-third the distance between the pins of the print
head (center to center). So essentially we can print a specific line one-
third of a dot lower than the previous line. In fact, that's exactly how
the Double-Strike Mode operates. One word of caution. As you can
imagine, total accuracy is not guaranteed for such fine settings as
11216-
and 2/216-inch.
This finer line spacing is accessed in much the same way as the
variable line spacing that we showed above with < ESC> " A". The
format is < ESC> "3" CHR$(n), where n can range from 0 to 255. Here's
an example using 11216 of an inch five times. Change lines 10 and 30
to read:
1!lJ LPRINT CHR$(27)"3"CHR$(1)
3~
LPRINT "ABCDEF"
ABCDEF
It gives very heavy looking letters. To carry this idea to an extreme,
increase the loop to 10 or 15. The ability to adjust line spacing in
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