Two Holes And Four Holes - Gestetner B147 Service Manual

PUNCH UNIT (OPTIONAL)

Two Holes and Four Holes

When the finisher punches holes, the punch motor drives all punches at the same
time.
Phase 1
1) The punch is in the home position.
The punch home position sensor [A]
is on. When the first sheet of paper is
set, the punch cam starts a forward
turn.
2) When the punch cam has made a
90-degree turn, a hole is punched.
3) When the punch cam has made a
180-degree turn, the punch comes
back to the home position. Note that
the punch cam [B] is not in the
previous position.
Phase 2
4) The punch is in the home position.
The punch home position sensor is
on. When the second sheet of paper
is set, the punch cam starts a
backward turn.
5) When the punch cam has made a 90-
degree turn, a hole is punched.
6) When the punch cam has made 180-
degree turn, the punch comes back
to its home position. Note that the
punch cam is not in the previous
position but in the same position as
the start fo phase 1.
Phase 3
• Phase 1 and phase 2 are alternately executed.
B602
[A]
1)
4)
68
2) 3)
B602D943.WMF
5) 6)
B602D944.WMF
[B]
SM