Master Making And Feed Mechanism - Ricoh LDD280 Service Manual

MASTER FEED

6.6.3 MASTER MAKING AND FEED MECHANISM

Master Feed Mechanism
[D]
[G]
[C]
[B]
[A]
[E]
[F]
C262D036.WMF
The master feed motor [F], a stepper motor, drives the master set [A], platen [B]
and tension [C] rollers.
The master feed control motor [G] drives the master feed control roller [D].
The tension roller feeds the master slightly faster than the platen roller, to prevent
the master from creasing. Therefore, the master between the platen roller and
thermal head is always under tension.
There is a torque limiter [E] built into the tension roller drive gear. This allows the
tension roller to become free from the master feed motor drive when the master is
under excessive tension, to prevent damage to the master.
In the diagram, the black arrows show the roller directions when the master is fed
forwards. The white arrows show the mechanism when it feeds the master in
reverse.
C262/C265 6-46 SM