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Printing Graphics PcOS Series 150 Programmer’s Guide
Page 128 Rev G 12/14/99
Chapter 12:
Printing Graphics
The Series 150 Printer has bit image graphic capabilities and a full PC-compatible graphic character set.
The bit image format is similar to that used on other personal computer printers. There are three modes of
operation: single-density, half-speed double-density, and full-speed double-density.
Single-density is the fastest mode. It makes a single, unidirectional, 60 dpi print pass. The full-speed
double-density makes two passes with a half-dot offset. This mode is half the speed of single-density print
but will print at 120 dpi. Half-speed double-density is half the speed of full-speed double-density;
however, the print quality is enhanced.
Character Graphics
Character graphics are created by joining individual characters together to produce a mosaic of
characters that form a graphic image. The simplest method is to use the * (or any other character) to
form an image. For example, ITHACA might be formed as follows.
*** *** * * ** *** **
* * * * * * * * * *
* * ***** **** * ****
* * * * * * * * * *
*** * * * * * *** * *
The extended character set of the printer supports line graphic characters that can be combined to
form windows and other shapes. For the shapes to join from line to line, the line spacing must be set
properly.
All characters are in a 9-dot-high character cell. The dots are 1/60 inch apart. Therefore, the line
spacing should be 10/60 or 1/6 inch. The set fine line space command can be used to set this line
spacing. If possible, the spacing should be reduced slightly to overlap the rows. This prevents any
white space from appearing between the lines. The following example illustrates the use of extended
graphic characters.