August 2006 PUNCH UNIT B702 (FOR B700/B701)
B700-67
Peripherals
Punch Selection and Firing
[A]: Punch Drive Motor (M24)
[B]: Punch Encoder Wheel
[C]: Punch Encoder Sensor (S24)
[D]: Punch HP Sensor (S23)
The punch drive motor (M24) [A] turns
the small, notched encoder wheel [B]
through the gap in the punch encoder
sensor [C] (S24). The sensor output is
used to control the punch timing.
The timing for 2-hole punching [E] is
different from 3-hole punching [F].
When the punch unit is at the punching
position, the punch motor turns until the
encoder detects the starting position for
2-hole or 3-hole punching.
For two-hole punching, it only turns 180
degrees not 360
• This is the ‘1’ position in the diagrams
(the top diagram is for 2-hole punching,
and the bottom diagram is for 3-hole
punching).
Then, the punch drive motor turns
counter-clockwise to the ‘2’ position. This
movement punches the holes in the
paper.
Then, the punch drive motor turns clockwise to the ‘1’ position, to be ready for the
next sheet of paper.
12
B700D355.WMF
12
B700D356.WMF
[A]
[B]
[C]
[D]
[E]
[F]