FISCHBEIN PBC-6000, Operator'S Manual

Page: 34 / 82

FISCHBEIN
®
Co. MODEL PBC-6000™
OPERATOR’S MANUAL
REV. D 2005-03 34
FRONT COMPRESSION ROLLER
Once the rear compression roller and belt have been positioned correctly, the front roller can be
adjusted to alter the pressure between the belts. The front roller is adjusted in a similar fashion to
the rear. Its block within the swing channel is moved towards and away from the centerline
between the two channels by turning a screw in the side of the block. The socket cap adjustment
screw passes through the front face of the swing channel and shrouding for easier access. The top
shrouding above the compression assembly does not have to be removed to adjust the pressure
once the rear compression roller has been set. To adjust the front compression roller and belt
pressure, follow these steps:
1.
For large adjustments to the front compression roller, the swing channel shrouding should be
removed. This will allow access to the compression belt for testing its tension.
2. The front compression roller can be adjusted with the PBC machine “ON” or “OFF”. If you
choose to perform the adjustment with the system “ON”, you must turn the Motor Enable
(keyed) Switch (
Illustration 8.5, page 28
) to the center “STOP” position. This will allow
the swing channel to close without the drive motor turning the belts.
3. The front compression roller assembly is held in position by the ½ inch socket cap screw,
which acts as the shaft for the roller. To move the compression roller, loosen the screw just
enough to allow the block to move. Loosening the screw too much will allow the screw
(shaft) to skew too much to accurately align the compression belt. (
Illustration 8.11
)
4. The front (swing channel) compression roller’s position is controlled by its block inside the
channel. Between the block and the front wall of the swing channel is a socket cap screw
(
A
), which passes through the channel wall and front shrouding (
Illustration 8.11
). Turning
the screw so that it rotates clockwise into the block, the roller is moved away from the
centerline between the channels, which reduces the pressure between the belts. If the screw
is rotated counterclockwise out of the block, the roller is pushed away from the front of the
machine and causes the pressure between the belts to increase. (
Illustration 8.12
)
5. Tighten the ½ inch screw socket cap screw (shaft) to lock the compression roller assembly in
place.
Illustration 8.10 (Top View)
WARNING
Never make adjustments to any rollers or sprockets while the
machine’s belts are moving.