Epson SQ-2550, SQ-850 Labeling the nozzles, 4-12Software and Graphics

Graphics

Labeling the nozzles

To tell the printer which nozzles to fire in each column, you first divide each of the vertical columns into three sections of eight nozzles each and consider each section separately. Since there are 256 possible combinations of the eight nozzles in each section, you need a numbering system that allows you to use a single number to specify which of the 256 possible patterns you want. This numbering system is shown below:

To fire any one nozzle, you send its number. To fire more than one nozzle at the same time, add up the numbers of the nozzles and send the sum to the printer. With these labels for the nozzles, you fire the top nozzle by sending 128. To fire the bottom nozzle, you send 1. If you want to fire only the top and bottom nozzles, you simply add 128 and 1, then send 129.

By adding the appropriate label numbers together, you can fire any combination of nozzles. Shown below are three examples of how to calculate the number that will fire a particular pattern of nozzles.

4-12 Software and Graphics