TOP AND BOTTOM WRAPS
There are two bistable, three position type switches controlling the number of wraps that
may be put at the top and b ottom of the load.
TOP WRAPS: 1,2,3
BOTTOM WRAPS: 1,2,3
These switches may be set before the automatic cycle begins, and in their different
positions will wrap respectively 1,2 or 3 turns of the film on the top or on the bottom of the
load.
PHOTOSWITCHES
Photoswitches are placed on the machine to monitor the motion and location of the loads on
the conveyors. For each optional, additional conveyor on the machine an additional
photoswitch will be added.
The photoswitches are located as follows (shown on the machine layout) :
Load Height Sensing Photoswitch:
located on the carriage and stops it from moving
higher than the highest point on the load. The photoswitch position on the track can be
adjusted in order to make the carriage pass the top of the load and make the film overlap
the top.
Turntable Load Location Photoswitch:
is the middle one of the three photoswitches that
are pointed at the turntable from behind the tower. Its purpose is to stop the load on the
turntable/process conveyor in a suitable position for wrapping. The turntable conveyor or
process conveyor is programmed to stop approximately 1.5 seconds after this photoswitch
is activated.
Turntable or Process Conveyor Safety Photoswitches:
these are the three
photoswitches pointed at the turntable or process conveyor from behind the tower. Their
purpose is to prevent the cycle from starting if the load is not properly positioned on the
turntable or process conveyor.
Infeed and Outfeed Photoswitches:
these are located approximately one foot from the
side of each conveyor in the middle of the section. Their purpose is to monitor the position
of the loads as load transfers are occurring. When the photoswitch is activated there is a
delay of approximately 1.5 seconds before the conveyor stops.
NOTE:
When testing the conveyor without the load the photoswitch must be kept activated
for at least 1.5 seconds in order to have the conveyor stop. For a downstream conveyor,
when the load is moved out the photoswitches range there will be delay of about 5 seconds
before an upstream conveyor is activated to move load.
LIMIT SWITCHES.
There are three limit switches located on the tower. The top-most and bottom-most switches
limits the motion of carriage determinate by location of the elevator’s drive and idler
sprocket. The middle limit switch purpose is to activate the clamp to open, once the carriage
reaches its level.
CAUTION:
These limit switches are factory adjusted. When setting the machine, please
double check their proper position.
