Read Sharp AR-F11 (serv.man6) Service Manual online
3-26
CHAPTER 3 SADDLE STITCH UNIT BASIC OPERATION
E.
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 (Figure 3-317). To prevent this
problem, the phase of the roller is identified and used to determine the timing of alignment.
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 (Figure 3-319). The alignment plates are
operated to correspond with this change in the state of the sensor.
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 (Figure 3-319). The alignment plates are
operated to correspond with this change in the state of the sensor.
Crescent roller
phase sensor (PI12S)
phase sensor (PI12S)
Flag
Feed motor
Stack
Crescent roller
Alignment plates
M1S
Figure 3-317
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