Ricoh DD 5450, Field Service Manual

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Chapter 3 Master Making/Master Feed/Ejection Section
2 Master Making / Master Feed / Ejection Section
1. Description
Master Making / Master Feed section Master Clamp Opening / Closing Section Master Ejection Section
< Master Making / Master Feed Section >
Make the master clamp of the drum unit clamp the master lead edge, performing master making
on the master with the thermal head. The master is conveyed to the drum unit via the platen roller
and sponge rollers 1, 2 by driving of the master feed stepping motor, while it is being processed in
the thermal head section. Sponge roller 2 is driven through the master feed clutch (electromagnetic
clutch), and controls the amount of master conveyed to the master clamp section of the drum unit
with the master feed clutch ON / OFF. The end mark sensor starts to detect when the end mark
(black) section printed on the end of the roll master is conveyed. "NO MASTER" is displayed on the
LCD panel. The end mark sensor also detects whether the master is conveyed properly through
the sensor.
Master feed clutch
Platen roller
Cutter unit
End mark sensor
Thermal head
up/down motor
Thermal head up/down sensor
Thermal head
Sponge roller 2
Master top sensor
Sponge roller 1
Master feed stepping motor
Master feed cover switch
Master detect sensor
2