Ricoh Gestetner 5450, Service Manual, Page: 72 / 315

DRUM 1 July, 1998
2-44
Drum Idling Mechanism
Quality Start Mode
In Quality Start mode; the machine enters the drum idling mode before printing.
This ensures that the first print has sufficient ink density even if the machine was
not used for a long time.
The user selects Quality Start mode by pressing a key on the operation panel. The
number of idling rotations is fixed at 45. However, SP3-90 can change this number.
NOTE: In Quality Start mode; the drum idling motion starts, before printing, when
the Start key is pressed. However, if there is no master on the drum, drum
idling is not performed.
Even if the Quality Start mode is active, and there is no master on the
drum, drum idling is skipped although the LED on the operation panel turns
on. When printing for the next original starts, the machine enters drum
idling mode if a large enough master is wrapped around the drum (it will
not be done for an A4 master on an A3 drum).
The drum idling roller [A] puts the ink onto the screens and master before printing.
The idling roller motor [B] turns to press the drum idling roller against the inner
surface of the drum screen [C]. The spring tension supplies additional force for this.
The cam [D] is turned by the motor, moving the drum idling roller towards the drum
screen. The actuator disk [F] interrupts the idling roller HP sensor [E] when the
drum idling roller is being used.
C229D013.WMF
[B]
[C]
[D]
[F]
[E]
[A]
Front
Rear