power applied to the machine, the forktruck
driver delivers a load and places it on the
turntable. After centering the load on the
turntable, the driver backs the forktruck away
until the forks clear the load and the machine.The
driver then gets off the forktruck, pulls out
a length of film sufficient to reach the load
and tucks the film between the load and the
turntable or between the layers of the load.
The driver then presses the Start pushbutton
on the membrane panel.
the turntable begins to rotate, the Power Roller-Stretch® is
energized and begins to dispense film to the
load with a reduced wrapping force. After a
preset time delay, the roll carriage raises
allowing the film to spiral around the load
and at the same time switching to the normal
wrap force. The speed at which the roll carriage
raises determines the amount the film overlaps
the preceding layer and the overall number
of layers of film on the middle of the load.
the roll carriage reaches the top of the load
the load height sensor detects the top of the
load and signals the roll carriage to stop.
The roll carriage may also stop when the upper
limit switch is actuated before the load height
sensor detects the top of the load. After the
roll carriage has stopped at the top of the
load, film is applied to the top of the load
until the number of “Top Count” revolutions
have been completed. The roll carriage then
moves downward again spiral wrapping the load. When
the roll carriage reaches the lower limit switch,
the roll carriage stops. Once the number of
wraps selected by the “Bottom Count” has
been satisfied, the turntable begins to “decel” and
move toward the home position at a slow or “homing
cycle is completed when the turntable stops
at the “home” or starting position.
The forktruck driver then cuts or tears the
film at the load and wipes down the remaining
tail of film against the load. The Top and
Bottom Counters are reset and the machine is
now ready to be unloaded in preparation for
the next load.