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8 Punch kit overview ENWW
Correction of the punch position
The punch unit positioned inside of the side
edge of paper by 5 mm or 10 mm performs
the following procedures to correct the
punch position so that the punch is always
centered on the paper. The punch position is
corrected by moving the punch unit to and
fro during conveyance of the paper.
● When finisher entrance PS (PS704)
detects the leading edge of the paper, the
punch unit is moved backward temporarily
until the paper edge sensor detects the
side edge of the paper. If punching is
performed for the paper conveyed from PI,
the time when PI passage PS/U (PS201)
or PI passage PS/L (PS206) detects the
leading edge of the paper becomes the
starting point.
● Subsequently, the punch unit moves back
frontward until the paper edge sensor
re-detects the side edge of the paper
(Detection of side edge reference
position).
● When the side edge reference position is
detected, the punch unit is again moved to
position the center of punch edges to the
center of the paper. The distance and
direction of this movement differ from
paper sizes. Only when moving backward,
the punch unit makes a stop at the side
edge reference position.
Punch
In the punch mode, the finisher conveyance
motor (M701) turns off to stop the paper
conveyance temporarily when the specified
time has passed since the finisher entrance
PS (PS704) detected the trailing edge of the
paper, and holes are punched.
During punching, the drive force of the
punch motor (M801) is transferred to the
shaft to rotate the shaft once. As the shaft
rotates, the eccentric cams at both ends of
the shaft rotate to lower the punch edges,
making holes in the paper.
After the punch is finished, the punch unit
moves to the side edge reference position
when the specified time has passed since
the trailing edge of the paper is detected by
PS704, which makes a standby status for
the punch process for the following paper.
Punch edge
Punch unit
Center of
punch edges
Paper edge sensor
5mm
or
10mm
Front Back
Moving direction
of punch unit
Direction of paper
conveyance
Paper center
Paper