6-21
19 April 2006
Detailed De-
scription
Pre-fold transport
When staples are detected (BK-Q19/Q20) the back jogger motor (BK-M2 - see
page 6-20) moves the back jogger down to release the trail edge of the set. The
side guides (BK-M3) move out slightly. Just enough to release the grip of the set
but still to guide the set straight to the fold stop. The stop gate solenoid (BK-SOL1)
moves the transport rollers upwards, gripping the set between the transport roller
below and idler roller on top of the set. The staple stop gate is pulled down by the
same solenoid and latched below the paper path. The set transport motor (BK-M5)
starts and transports the set down to the fold stop. Fold stop sensor (BK-Q7) near
the fold stop, activates. Side guides (BK-M3) move out to their initial position.
In case the sheet length is shorter than the distance between staple stop and fold
stop (i.e. A4), the staple stop will unlatch as soon as the set has cleared the start
sensor. The staple stop is unlatched by the stop gate release solenoid (BK-SOL2).
In case the sheet length is longer than the distance between staple stop and fold
stop (i.e. A3), the staple stop will remain latched during folding until the set has
cleared the start sensor (BK-Q4).
The stop gate solenoid (BK-SOL1) releases and the set transport motor (BK-M5)
stops when the fold stop sensor (BK-Q7) is activated or start sensor (BK-Q4) is
clear, whatever comes rst.
Q7
Q19/Q20
Q4
M3
BOOKLET MAKING PROCESS
SOL2
M5
SOL1
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