Print Rates - Printronix

P9212 Maintenance Manual

Print Rates

The printing speed of text characters is a function of the selected font and dot
density, and is measured in lines per minute (LPM). Print speed is
independent of the number of characters configured in the character set. Text
attributes such as bold or emphasized printing, superscripts, subscripts, or
elongated characters cause print rates to decrease to not less than half the
rates of the font without such attributes. Table F–1 charts typical P9212
printing rates. The plotting speed of graphics is measured in inches per
minute (ipm), and is calculated as follows:
Shuttle Speed
Shuttle speed varies with the horizontal dot density:
Selectable by
graphics
control codes
NOTES:
1. The theoretical plot speed is reduced by half if there are adjacent dots in
a dot row (as in the case of RASTER plot). This limitation is due to the
hammer fire cycle time.
2. The theoretical plot speed is again reduced by half if the number of
non–adjacent dots in a row exceeds 86% of the maximum number of
non–adjacent dots for a given horizontal print resolution (this limitation
is due to power consumption requirement).
Printer Specifications
1
x Vertical Density
Horizontal Density
(milliseconds / stroke)
(dots / inch)
50
60
70
80
90
100
110
120
130
140
150
180
200
x 60,000 = Plotting speed in
inches / minute
Shuttle Speed
6.25
6.25
6.25
6.25
6.25
6.25
6.25
6.25
6.75
7.25
7.8
9.375
10.4
F–5