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Operator's Manual
3950 Series FD 3950PF
26
Exchanging the
Suction Drum
The suction drum (1) is equipped with two PUR-rings for reliable sheet detachment.
If marks occur on sensitive or freshly printed paper, a different suction drum (accesso-
ry) can be used. This suction drum has a PUR-coating over the entire surface and
consequently a higher coefficient of friction.
For installation of this suction drum proceed as follows:
Ł
Pull off the cover (2).
Ł
Loosen the screw (3) and remove the
suction drum.
Ł
Install the PUR suction drum.
Ł
Tighten the screw (3).
Ł
Replace the cover (2).
1
2
3
Adjusting the
Suction Segment
The suction drum (4) separates the leading edge of
the sheets from the stack. For this purpose there is a
suction segment inside the suction drum.
The suction angle can be changed by adjusting the
lever (5) to adapt suction point and suction area to
different types of paper.
A scale (6) facilitates the adjustment.
4
7
5
0
6
In most cases an adjustment is only necessary for light paper stock resp.
paper with a downward curl.
Fine adjustment is only possible with the machine running.
In connection with the adjustment of the suction segment, the height
of the separator plate (7) can also be varied.