Chapter 11: IBM - Graphics
11-14
Notes on graphic
programming
Make sure you enter exactly the same amount of column bytes as
specified by n
1
and n
2
in the LPRINT instruction, otherwise you will
not obtain the required results. Only the number of columns can be
printed which are the maximum permissible for the respective
combination of printer model and graphic density. If an LPRINT
instruction contains more data, this can result in unwanted effects.
Remember the restrictions which apply to double density and nor-
mal speed and to quadruple density in relation to dot placing. In
these cases, miss out at least one dot position between two dots in
the same dot line. Adjacent dots are not printed.
The various programming languages offer the experienced user
virtually unlimited possibilities for graphic programming.
Print alignment
If you place great store on vertical alignment over several graphic
lines and can accept a low print speed, select the setting Unidirec-
tional in the menu Graphics. With this setting, printing only takes
place from left to right and this will avoid any horizontal offset in
vertical lines which can arise with bidirectional printing. With the
menu item Print Registration for bidirectional printing, you can
adjust the vertical alignment of graphic lines to each other.
The standard setting for print alignment is 0. If you are not satisfied
with the alignment, you can set this value from 0.25 mm to the left
to 0.25 mm to the right.
Value Shift
0.25 mm Right 0.25 mm to the right
0.20 mm Right 0.20 mm to the right
0.15 mm Right 0.15 mm to the right
0.10 mm Right 0.10 mm to the right
0.05 mm Right 0.05 mm to the right
0 no shift
0.05 mm Left 0.05 mm to the left
0.10 mm Left 0.10 mm to the left
0.15 mm Left 0.15 mm to the left
0.20 mm Left 0.20 mm to the left
0.25 mm Left 0.25 mm to the left
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