Wincor Nixdorf TH200, Programmer'S Manual

Page: 92 / 106

Programmer’s Guide
TH200
92
Formatting of Print Data in the Printable Area
Formatting of print data in the printable area is performed as follows:
1) The printable area is set using ESC W . If all printing and feeding are complete before the printer
receives the ESC W command, the left side (as you face the printer) is taken as the origin (x0, y0) of the
printable area. The printable rectangular area is defined by the length (dx dots) extending from and
including the origin (x0, y0) in the x direction (perpendicular to the paper feed direction), and by the
length (dy dots) in the y direction (paper feed direction). (If the ESC W command is not used, the
printable area remains the default value.)
2) When the printer receives print data after ESC W sets the printable area and ESC T sets the printing
direction, the print data is formatted within the printable area so that point A in Figure 3.12.2 is at the
beginning of the printable area as a default value. (When a character is printed, point A is the baseline.)
Print data containing downloaded bit images or bar codes is formatted so that the bottom point of the
left side of the image data (point B in Figure 3.12.3) is aligned with the baseline. However, any Human
Readable Interpretation (HRI) characters are printed under the baseline. At the point labeled Point B, if
characters (such as double-height characters) higher than normal size characters or downloaded bit
image characters are received, any part of the character higher than the normal-size character is not
printed.
3) If the print data (including the space to the right of a character) exceeds the printable area before the
printer receives a command (e.g., LF or ESC J ) that includes line feeding, a line feed is executed
automatically within the printable area. The print position, therefore, moves to the beginning of the next
line. The line feed amount depends on the values set by commands (such as ESC 2 and ESC 3 ).
4) The default value of the line spacing is set to 4.23 mm {1/6
″} and corresponds to 30 dots in the vertical
direction. If print data for the next line contains extended characters that are higher than double-height
characters, bit images taking up two or more lines, or bar codes higher than normal characters, the
amount of line feeding may be insufficient, resulting in overlapping of the characters' higher-order dots
with the previous line. To avoid this, increase the amount of line spacing. The line spacing in Figure
3.12.4 requires 27 dots or more.