Citizen CT-S300 User Manual download pdf (Page 148)

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4.1.3 Mapping of Print Data in the Print Area

Print data is mapped in the print area as follows:

(1) The print area is set by ESC W. When the printer has finished all of the print and paper feed actions

specified before receiving an ESC W, the ESC W sets the right end (as viewed facing the printer) as the

start point (x0, y0) of the print area. The print area is a rectangle defined by two edges extending from

the start point (x0, y0): one edge running in the “x” (Horizontal) direction by “dx” pitch (inclusive of the

start point), and the other running in the “y” (Vertical) direction by “dy” pitch. (If no ESC W is defined,

the default values are used to define the print area.)

(2) With a print area defined by ESC W and a print direction specified by ESC T, when the printer receives

print data, the print data is mapped in the print area where point A (see the Figure 4-1 “Mapping Position

for Character Data”) is used as the initial value of the start point. If the print data consists of characters,

this start point serves as the baseline.

If the print data is a downloaded bitmap image or a bar code, the print data is mapped with its lower-left

point B aligned to the baseline. (See the Figure 4-2 “Mapping Positions for Print Data”.)

When attempting to map the HRI characters of a bar code, however, the section above the standard

character height will not be printed.

(3) If print data (or the space to the right of a character) extends beyond the print area before a command

that involves a line feed (for example, LF or ESC J command) is received, a line feed is automatically

executed in the print area, so that the mapping position of the print data is moved one line. The next

mapping position will be the beginning of the line. In this case, the line feed width is as defined by a

command such as ESC 2 or ESC 3.

(4) By default, the line feed width is 1/6 inch, which is equivalent to 34 dots. If the print data for the next line

includes a vertically doubled or taller character, a downloaded bitmap image extending two or more

lines, or a bar code taller than the character height, the data, therefore, falls short of the line feed width,

causing the upper dots of the character to overlap the print data of the current line. The line feed width

needs to be increased.

Figure 4-1 Mapping Position for Character Data

Figure 4-2 Mapping Positions for Print Data

Baseline

Point A

Print area

Mapping direction

24-3

dx, dy

x0, y0

Baseline

Point B

Double height character

Downloaded

bit image

(HRI Characters)

Bar code

GS k m

24-3

6*8=48

GShn

24*2-6=42

Point B

Bit image

Esc * m nL nH

x*8

Point B

nH*256+nL

GS * x y

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Citizen CT-S300 User Manual Page 148

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