Wexxar WF30T, Operation And Service Manual

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WF30T Case Former Controls
4-25
4.6.3 Factors Influencing Pneumatic Speeds
Case height, width, weight, corrugate thickness, flute size and scoring all affect the optimum
speed of the pneumatic cylinders. A significant increase in case size or weight makes it more
difficult to lift, rotate and fold the cases.
Flat Case Height (Dimension ‘B’)
The height of the case being formed is a major determinant of machine throughput. Machines
running shorter cases can operate faster because the mast movements can achieve higher
speeds. Taller cases also add weight, so that more energy is required to lift, rotate and fold the
cases. For tall or wide cases, the load-bearing ‘mast down’ and ‘jaws open’ strokes must be
slowed down to prevent case jams.
Case Thickness (Dimension ‘F’)
Case corrugate thickness (especially double or triple wall corrugate) will add weight and make the
case less pliable. It will therefore cause cycle times to change, as the pneumatic cylinders
require more energy to fold the flaps correctly and to perform other pneumatically driven
functions.
Case Size and Weight
A significant increase in case size or weight will also change the speed of the solenoid-driven
cylinders, as they require more energy to drive the cylinders. For solenoid valve troubleshooting,
see Section 10.6:
‘Pneumatic Troubleshooting’
.
4.6.4 Non-Lube Pneumatic System
Wexxar’s non-lube pneumatic system features a coalescing-type mist separator that effectively
removes 99.9% of oil mist from incoming air. Combined with pre-lubricated air cylinders and
valves, this option will provide reliable pneumatic operation without the hassle of keeping the
lubricator filled.
Maintenance
•
Drain the mist separator bowl frequently.
•
As the mist separator becomes contaminated, the pressure drop across the filter will
increase. Replace the element when the pressure drop reaches 15 PSI, or once per year,
whichever comes first.
•
The rate at which the filter element is contaminated will be greatly affected by the quality
of the incoming air. If the air is wet and contaminated with lubricant, the filter element will
need more frequent replacement.