Operator's Manual
3950 Series FD 3950
19
Most types of paper with a weight of 80 to 90 GSM can be separated in this position.
For different paper grades, other figures must be set in the window:
- Paper grades below 80 GSM: 7 - 9
- Paper grades above 90 GSM: 1 - 5
Setting for light paper grades:
For running light-weight paper, first try the suction segment setting as
described under "Basic Setting".
A steeper inclination is only necessary for special types of paper.
Light paper grades easily cling to the curve of the suction drum.
Therefore the suction segment must be tilted in direction of the paper stop.
The inclination of the suction segment in this direction
has the effect that the paper is wrapped around the
suction drum (1).
The sheets are easily separated from the stack and
double sheets occur very rarely.
1
In the batch counting mode it may happen occasionally that a single sheet is fed
during the interval time.
This is caused by the fact that the suction drum continues to turn during the interval
time (although without vacuum). For light paper grades the friction between paper
and suction drum may be sufficient for detaching a sheet.
To prevent this, a special plate (2) can be placed
over the suction drum. This plate, which is pulled
out of the feed table, can cover the suction drum
to its highest point (3).
Sheets are no longer affected by the friction
of the suction drum.
Proceed as follows to pull out the plate:
Ł
Loosen the screw (4).
Ł
Insert a screwdriver in the hole (5).
Ł
Pull out the plate.
Ł
Tighten the screw (4).
2
3
5
4
