565
JAN 2006
Ver. 5.2
DP-3510/3520/3530/4510/4520/4530/6010/6020/6030
11.1.3.3.5. Controlling the Phase of the Crescent Roller
1. Outline
If alignment was executed with the Crescent Roller in contact with the stack of sheets, the resulting
friction against the roller causes the stack to move inappropriately (fig. 3-030). To prevent this problem,
the phase of the roller is identified and used to determine the timing of alignment.
The phase of the Crescent Roller is identified by the Crescent Roller Phase Sensor (PI12S). The flag
for the Crescent Roller Phase Sensor is mounted to the Crescent Roller Shaft. The flag will leave the
Sensor while the Roller Shaft rotates, turning the Sensor ON or OFF, enabling the assumption that the
Crescent Roller is positioned at the opposite side of the stack (fig. 3-032). The Alignment Plates are
operated to correspond with this change in the state of the Sensor.
Fig. 3-030
Fig. 3-031
Crescent Roller
Flag
Feed Motor
M1S
Alignment Plates
Stack
Crescent Roller Phase
Sensor (PI12S)
Alignment Plates
Sensor Flag
Crescent Roller Phase
Sensor (PI12S)
Crescent Roller
If the crescent roller was
in contact with the stack,
alignment operation
could be obstructed.
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