Confidential
EPSON
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B
63 62
TM-T88III series
Specification
(STANDARD)
3.12.3 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 points 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.
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