Strapping Machine fault
Strapping Machine Cycles But Does Not Complete
A strapping machine that starts a cycle but stops before completing it — without sealing, without ejecting — has usually detected an out-of-range condition: a sensor fault, timing issue or mechanical problem partway through the sequence.
Does this match your fault?
Common symptoms
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Machine starts the cycle then stops without sealing
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Stops at the same stage of the cycle every time
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Fault code shows after the machine stops
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Completes tension but stops before sealing
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Stops intermittently — completes some cycles but not others
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Alarm sounds mid-cycle but no clear fault shown
What causes this
Typical causes
Position or sequence sensor fault
The machine uses sensors to confirm each stage of the cycle before proceeding. A dirty, misaligned or failed sensor causes the machine to stop waiting for a confirmation that never comes.
Gripper or clamp not releasing
A mechanical component — gripper, strap clamp or cam — has not returned to the correct position after the previous cycle. The machine cannot proceed until all positions are confirmed.
Seal or tension stage timeout
The seal or tension stage has exceeded its allowed time without completing. This is usually caused by worn components that are slower than expected, triggering a timeout stop.
Control board or parameter fault
A corrupted parameter or control board fault causes the machine to lose its position in the cycle sequence and stop. More common after power interruptions or on older machines.
Before calling an engineer
What to check first
These are the practical checks worth trying before calling out an engineer. If none of these resolve the fault, or if the issue keeps returning, it needs a proper diagnosis.
01
Note exactly where in the cycle it stops
Observe carefully: does it stop during feed, tension, seal or retract? The stage at which it stops tells you which subsystem to investigate first.
02
Read and photograph the fault code
Check the display for any fault code before resetting. Even a code that seems meaningless is useful for diagnosis — photograph it and include it in your fault report.
03
Check and clean all sensors in the machine head
Locate the sensors in the strapping head — most machines have several small sensors that confirm position during the cycle. Clean each one with a dry cloth and check alignment.
04
Check for any mechanical obstruction in the head
With the machine isolated, open the head access and check that all mechanical components — grippers, clamps, cutter — move freely to their home positions without binding.
When to call us
If any of these apply, call now
At this point, continued resets or workarounds are unlikely to resolve the underlying fault. A proper diagnosis is faster and cheaper than repeated call-outs for the same issue.
Machine stops at exactly the same point every cycle despite resets — sensor or mechanical fault
Fault code present that relates to a specific head component
Mechanical component visibly stuck or not returning to home position
Related faults
More fault support
Report a Breakdown
Include the machine make and model, the fault you are seeing and any error codes. A photo of the display helps us triage faster.