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Upper Friction Roller
Platen
Cam Shaft
Lower Friction Roller
Single Sheet Paper
(Push Mode)
6.4.2 Paper Feed Mode
(1) Friction Paper Feed Mode
This mode is for feeding single-sheet paper from the
slot on top of the printer in the friction paper feed
position. By operating the paper feed selector, the
tractor drive gear is disengaged from the tractor drive
device, and the paper feed selector lever releases
the spring loaded upper and lower friction rollers by
rotating the cam shaft to apply gripping force to the
platen. This enables
paper feeding with platen
rotation.
(2) Tractor Paper Feed Mode
This mode is for feeding continuous paper from either
the bottom or rear of the printer. By moving the paper
feed selector to the "EJ" position, Clutch Gear A
éngages
Clutch Gear B by cam function. This
enables turning of the tractor drive mechanism. Then
the sector gear molded on the paper feed selector
turns the cam shaft, which moves the upper and
lower friction rollers away from the platen. This
enables free paper passage from the rear feed. The
paper feed selector also pushes the leaf switch to
notify the CPU that the selector is in the "¢ |" position
when turning the lever.
Continuous paper can be fed with either pull or push
feed. Feed from the tractor upper side enables pull
feed, and feed from the tractor lower side enables
push feed.
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