User`s manual

1–6 Introduction
DOT
ROW START
PAPER
ADVANCES
PAPER
FEED
PAPER
ADVANCES
SPACE
1
2
3
4
5
6
7
8
9
10
11
12
1
2
*
**
USED FOR LOWERCASE DESCENDER ONLY
USED FOR UNDERLINE AND LOWERCASE DESCENDER
*
**
CHARACTER
LINE
DIRECTION OF SHUTTLE MOVEMENT
1 HAMMER
PRINT SPAN
1 HAMMER
PRINT SPAN
Figure 1–2. Dot Matrix Line Printing
Printing Speed
The speed of text printing is measured in lines per minute (lpm). This speed
is directly proportional to the number of dot rows required to produce a
character line, regardless of the number of characters in the line. More dot
rows are required to print lowercase characters with descenders; conse-
quently, those character lines print at a fractionally lower rate.
The LG06 and LG12 also print dot–addressable graphic images. The speed
of graphics plotting is measured in inches per minute (ipm). Unidirectional
plotting produces slightly better print quality, and takes about twice as long
as bidirectional plotting. You can select either plotting mode from the control
panel.
Printing and plotting rates also vary according to the print mode you select.
Print mode refers to the way you instruct the printer to create characters. If,
for example, you select near letter quality (NLQ) mode, the printer uses more
dot rows to form characters than if you choose high speed (HS) mode.
Character formation and print speed are faster in HS mode because fewer dot
rows are used to form characters. Vertical dot density is thus a factor in
printing speed. Nominal printing rates for both printers are in Appendix B.