Epson 5000 - Manual (Page 90)

OCR-B
Character spacing
Character spacings of 10, 12, or 15 cpi (characters per inch) and
proportional are available using software commands or your
application program. See Chapter 7 for the character spacings
available for each font.
In the 10, 12, or 15-cpi modes, each character gets an equal
amount of space. In proportional mode, the spacing varies
from character to character. A narrow letter like a lowercase i
receives less space than an uppercase W.
Use Roman T or Sans Serif H font only in proportional mode
for best results.
The printout below compares the different types of spacing:
T h i s i s 1 0 c p i p r i n t i n g .
This is 12 cpi printing.
This is 15 cpi printing.
This is proportional printing.
Using the Printer 3-25