Roll Edition Detection; Drive Mechanism - Ricoh FW780 Service Manual

2.1.2 ROLL EDITION DETECTION

The roll paper end sensor [A] is located above each roll. When the roll paper runs
out and the roll paper end sensor detects the black core of the roll, roll end is
indicated on the operation panel. If the paper is not caught by the feed rollers,
paper feed fails. In this case, roll end is indicated instead of a paper misfeed
indication.

2.1.3 DRIVE MECHANISM

[E]
The roll feed exit roller [B] is driven by the roll feed motor [C] through timing belts
[D] and gears [E]. The feed roller [F] of each roll feed unit is driven by the roll feed
motor through the belt and each gear and each roll feed clutch [G]. Each feed roller
can be driven manually by each knob [H].
SM
[D]
[G]
[B]
7-5
MECHANICAL OPERATION
[A]
B436D503.WMF
[C]
[F]
[H]
B436D102.WMF
B435/B436