Operatjng
Prjncjples
U400
Smdce Manual
Push -
Pull Tractor Method
The push-pull tractor method is a combination of
the
push
method,
using
the
standard
tractor, and ,
~’
“
the pull method, using an optional tractor.
The
two
traders
operate simultaneously to push and
pull the paper through the printer mechanism.
Figure
2-6 shows
push-pull
tiadoroperation
when
the paper is fed through the rear paper entrance.
tractor feed paper path, so continuous paper
paper path.
SHEET GUIDE
is not advanced by this roller.
F@me
2-7 shows the
->
Cut Sheet
PLATEN
QY
Continuous paper
;&TRAcTOR
~.i
,
.
.
.
Figure 2-6. Push-Pull Tractor Paper Advance Mechanism
Disengage Lever
The disengage lever switches whether or not the printer transmits the torque of the PF motor
assembly to the tractor transmission gear. (See Figures 2-5 and
245.)
The
paper path is different from friction feed and tractor feed. The PF driven roller is not in the
/
‘ DETECTOR
ASSY.,
PE
ROLLER, PF, DRIVEN
Figure 2-7. Paper Path
,.
24
Rev.A
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