FISCHBEIN PBC-6000, Operator'S Manual, Page: 28 / 82

FISCHBEIN
®
Co. MODEL PBC-6000™
OPERATOR’S MANUAL
REV. D 2005-03 28
8.5 BELTS, ROLLERS AND WHEELS
8.5.1 CARRY THROUGH BELTS
The carry through belts are responsible for grasping the bag top at the infeed and guiding it through
the system to be heated, folded and sealed closed. If the belts are not synchronized or are worn,
they will not effectively control the bag top. The following sections will describe proper settings
for the belts, as well as how to maintain and replace them.
PRESSURE BETWEEN BELTS
The carry through belts must grasp the bag top so that the bag cannot be removed from the belt
without considerable effort. The belts are set at the factory for most common bag types. If bag
samples were sent at the time the machine was ordered, then the belts are set for their
characteristics.
The pressure between the belts is determined by the placement of the carry through belt plates,
located under the channels. (
Illustration 8.4
) They are attached to the channels by guide bar
supports. The holes for the bolts holding the plates to the supports are slotted to allow the plates to
move towards or away from the sealing centerline of the machine.
If the pressure between the belts must be adjusted, then follow these steps:
1.
While the system is electrically and pneumatically turned “OFF”,
remove the front (swing channel) and rear (fixed channel) shrouds to
access the folder area.
2. Turn the Motor Enable (keyed) Switch (
Illustration 8.5
) to the center
“STOP” position. This will allow the pneumatic system to close the
swing channel without the drive motor turning the belts.
3. Make sure the Heater control is “OFF”.
4. Turn the pneumatic and electrical supplies “ON”.
5. Push the green “START” button and then push and hold the blue
“CLOSE” buttons until the swing channel closes completely. The swing
channel will stay closed and the drive motor will not be turning the belts.
Illustration 8.5
Illustration 8.4 (Bottom View)
WARNING
Be very careful when working on the machine when covers or
shrouds are removed!