Printing Rates - IBM 6400 Setup Manual

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.
Print Quality Characters
Dot Density per Inch
(DPI)
Note 1
Correspondence 10
90 (180) X 96 12
15
Data Processing 10
60 (120) X 72 12
13.3
15
17.1
High Speed 10
60 (120) X 48 12
13.3
Note 1
Note 2 D (E) X F +G , where:
A–10 6400 Line Matrix Printers Setup Guide, Cabinet and Pedestal Models
6400 Nominal Print Rates
Dot Matrix
Note 2 500
7(13)X9+3 200
6(11)X9+3
(9)x9+3
5(9}X7+2 375
4(8)X7+2
4(8)X7+2
3(5)X7+2
3(5)X7+2
5(9)X5+1 500
4(7)X5+1
4(7)X5+1
A (B) X C, where:
PERFORMANCE
UPPERCASE DESCENDERS
ONLY & UNDERLINE
LPM LPM
1000 1500 500 1000
400 600 155 306
750 1125 300 600
1000 1500 428 865
A is maximum horizontal dot density
B is horizontal dot placement density
C is vertical dot density
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
PLOT MODE
IPM
1500 500 1000 1500
459 21 42 61
900 42 83 127
1284 62 124 186