Printer Control Codes
PcOS Series 90PLUS
Programmer's Guide
Print Rotation Commands
Page 42
Rev Q
11/07/05
5.8
Print Rotation Commands
To provide printing flexibility on preprinted and various size forms, rotated print capability is available in slip
and receipt mode. Rotated print mode will adjust the print in any of three 90° orientations. In 90° and 270°
rotated mode, the print data is first buffered by the printer, processed (rotated), and then printed which causes
the print process to be delayed slightly as it takes some time to process the data before it is printed. In 180°
mode, the print is simply inverted and mirrored.
Because the rotated 90° and 270° print buffers are limited to 2240 characters, the amount of rotated print is also
limited. The printer can support a limit of 28 lines of rotated print. Therefore, the maximum line length is 80
characters. The technique used by the Series 90PLUS Printer is to receive all the print to be rotated and convert
it into graphics, which requires buffer space for all possible characters in each print line. Each line has a fixed
length buffer regardless of how much data is actually sent to the printer. The printer will fill the buffer for each
line to the maximum size. As a result, a short line of two characters will take as much buffer space as a long line.
To make the most efficient use of buffer space, the line length is predefined. The default line length is 80
characters, which leaves room for 28 lines. To allow longer lines to be printed, the line length can be changed;
however, no more than 28 lines and 128 characters per line are allowed. For example, if the line length is
expanded to 128, there is buffer space for 2240/128 or 17 lines.
Specifying the line length is also useful to determine where data is printed on forms. In rotated 90
°
and 270
°
mode, the print field can be extended to print the complete line length specified. Extending the line length is
useful for printing forms such as checks where the form is fixed but the data can change. This mode is called
line formatted mode. In line formatted mode, the line length is set not by the longest line entered but by the
maximum line length. (Line lengths less than 80 will not print more than 28 lines, only the format will be
affected).
A line spacing table controls the spacing between lines. The table is defined by the rotated print line spacing
([ESC] u ...) command or by inserting [LF] or [ESC] J <n> commands in the rotated data. The [ESC] u
command specifies the number of dots to be added between each printed line. Each line has an entry in the table.
There is room for 28 lines in the table. The minimum spacing (and default) is one dot or 1/80 inch between
lines, which results in a total of ten dots in a line or 10/80 inch (8 lines per inch).
There are two rotated fonts in the printer, 5 x 7 and 7 x 9. If the character cell is 7 x 9 with one dot of white
space
9
or the total cell size is 7 x 10, the cell is printed at 80 dots per inch. If three dots are added, there will be
four dots total, and the cell will be 7 x 13. The following table specifies lines per inch for various numbers of
inserted dots.
Number of dots added
0
1
2
3
4
5
6
7
Spacing specified
1
2
3
4
5
6
7
8
Cell size
7 x 10
7 x 11
7 x 12
7 x 13
7 x 14
7 x 15
7 x 16
7 x 17
Line spacing (inch)
0.125
0.1375
0.15
0.1625
0.175
0.1875
0.2
0.2125
Number lines per inch
8
7.27
6.67
6.15
5.71
5.33
5
4.7
Table 13 Rotated print spacing with 7 x 9 font
9
Line graphic characters are 7 x 10 which allow touching characters as a default.
Summary of Contents for Ithaca 90PLUS Series
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