GP44 Semi-Automatic Strapping Machine
OPERATION -27-
Initial Retraction
NOTE: The S6 switch signals the machine that initial retraction is complete and it is now time to go into
controlled tension. There is a watchdog timer in the program that will tell the machine to go into final tension
even if the S6 switch is not activated. This is a subtle difference in the machine operation that will occur if the
S6 switch malfunctions. It is only noticeable as a slight delay in the initial retraction end/controlled tension
start.
Symptom Cause Solution GP
Machine is sealing
before initial
retraction is
complete
The strap is getting
caught on something
during initial retraction
which is falsely tripping
the S6 switch.
Eliminate cause of the snagging. Inspect
strap path for problem areas or restrictions.
Make sure arch flaps are opening sufficiently
and arch flap spring tension is not too high.
X
Machine is sealing
before initial
retraction is
complete
The S6 switch is giving a
faulty signal
Replace the S6 switch.
X
Machine is sealing
before initial
retraction is
complete
Retract solenoid plunger
is not engaging properly
Inspect plunger and solenoid for dirt, pitting, or
other obstructions. Make sure solenoid is
adjusted properly. Make sure plunger linkage
us moving freely.
X
Machine is sealing
before initial
retraction is
complete
Retract bearings are dirty,
wet or greasy.
Eliminate the cause of the contamination.
X
Machine is sealing
before initial
retraction is
complete
Retract bearings do not
rotate freely
Replace feed roller bearings on GP.
X
Machine is sealing
before initial
retraction is
complete
Too much strap in the
accumulator
Adjust sensor spring in the accumulator.
Make sure the accumulator feed roller/motor
are working properly and adding strap to the
accumulator.
X
Machine is sealing
before initial
retraction is
complete
There is a slight
obstruction in the strap
path
Inspect strap path, guides and arch for debris
and obstructions. Check all guides have
adequate clearance. Look for damaged arch
track.
X
Machine is sealing
before initial
retraction is
complete
Poor quality strap
(camber)
Replace with another roll of strap
X
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