Epson LQ-860 User Manual - Page 121

Designing Your Own Graphics With what you know now, you can use the simplest application of graphics-calculating by hand the data to print the graphic image. While this method is the most tedious, it helps you understand dot graphics. It is also useful for small graphic elements that are used many times. The illustration below shows how you can use a grid on paper to plan where you want dots to be printed. This grid is for a single line of graphics 42 columns long. Because each line of 24-pin graphics is approximately l/8th of an inch high and because triple-density graphics print 180 dots per inch horizontally, a design planned on this grid will be about 1/8th of an inch high and less than 1/4th of an inch wide. The actual pattern that the printer prints on the paper is made up of dots that overlap each other both vertically and horizontally. The planning grid uses an x for each dot because using an accurate representation of the dots makes calculating the data numbers difficult because they cover each other. Therefore, remember that each x represents the center of a dot, and the dots actually overlap. 4-14 Software and Graphics