Ricoh JP5000 Service Manual page 61

1 July, 1998 MASTER FEED
2.4.4 WRAPPING THE MASTER AROUND DRUM
Rear
[G]
[D]
[C]
[F]
[E]
Front
[A]
[B]
C229D091.WMF
Drum Lock and Master Clamper Open
As explained in the Master Eject section, the drum guide [A] holds the drum at the
master eject and master making positions.
When the drum reaches the master making position, the drum guide moves to
engage the stud [B] on the rear drum flange until the clamper open position sensor
[C] is actuated. (The other stud was used for the master eject position.)
The master clamper opening arm [D] is just above the drum guide. The arm is
different from the one used for opening the master clamper at the master eject
position. The clamper motor [E] drives the arm and opens the master clamper [F],
in synchronization with the drum guide movement.
The drum guide moves (to open the master clamper) until the clamper open
position sensor is interrupted by the feeler. Then it stops immediately (unlike at the
master eject position of the drum) as shown in the diagram.
Before the drum starts turning to start wrapping the master on the drum, the drum
guide returns to the home position until the clamper close position sensor [G] is
activated. The master clamper opening arm also returns, closing the master
clamper.
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