A–10
6400 Line Matrix Printers Setup Guide, Cabinet and Pedestal Models
Printing Rates
The printing speed of text is measured in lines per minute (lpm), and is a
function of the selected font and the vertical dot density. Printing speed is
independent of the number of characters configured in the character set
repertoire. Print rates for lines containing attributes such as bold or
emphasized printing, superscripts, subscripts, or elongated attributes will
decrease to not less than half the rates of the font without such attributes. The
exact print rate of lines containing these attributes depends on the specific
print job, but software maximizes the throughput by dynamically
determining which dot rows contain adjacent dots and must be printed in two
strokes. The table below lists typical printing rates.
The reverse paper feed capability allows the printing of multiple densities on
a single line. This is useful in printing forms and text together or in mixing
different fonts on a print line. Use of multiple densities and reverse paper
feed also affects throughput.
6400 Nominal Print Rates
PERFORMANCE
Print
Quality
Dot Density
(DPI)
Characters
per Inch
Dot Matrix
UPPERCASE
ONLY
LPM
DESCENDERS
& UNDERLINE
LPM
PLOT MODE
IPM
Note 1 Note 2
500 1000 1500 500 1000 1500 500 1000 1500
Correspondence
90 (180) X 96
10
12
15
7(13)X9+3
6(11)X9+3
(9)x9+3
200 400 600 155 306 459 21 42 61
Data Processing
60 (120) X 72
10
12
13.3
15
17.1
5(9}X7+2
4(8)X7+2
4(8)X7+2
3(5)X7+2
3(5)X7+2
375 750 1125 300 600 900 42 83 127
High Speed
60 (120) X 48
10
12
13.3
5(9)X5+1
4(7)X5+1
4(7)X5+1
500 1000 1500 428 865 1284 62 124 186
Note 1
A (B) X C, where:
A is maximum horizontal dot density
B is horizontal dot placement density
C is vertical dot density
Note 2
D (E) X F +G , where:
D is maximum number of dots that may be placed on
E horizontal positions
F is number of vertical dots for uppercase symbols
G is number of dots available for descenders
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