Specifications

Confidential

SHEET

NO.

SHEET

REVISION

TITLE

TM-U590 series

Specification

(STANDARD)

3.12.4 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 B is the baseline.)

Print data containing downloaded bit images is formatted so that the bottom point of the left

side of the image data (point B in Figure 3.12.2) is aligned with the baseline.

At the beginning of the printable area, 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 for paper roll is set to approximately 4.23 mm {1/6"} and

corresponds to 12 dots. If print data for the next line contains extended characters that are

higher than double-height characters, or bit images taking up two or more lines, 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 requires 15 dots (30 pitch) or more (see Figure 3.12.2).