JUKI MOL-254 Engineer's Manual page 221

Trouble
Belt loop splice is not detected.
Belt loop splice is mistakenly detected.
Belt loop splice section remains at cross cut
section.
Cause (1)
Data has not been inputted.
Belt loop which is different from input data is
used.
Level meter fails to work.
Belt loop which is different from input data is
used.
Fixing screws of gear, sensor installing plate,
etc. are loosened.
Adjustment of the backlash of reduction gear
in the splice detector mechanism is improper.
The splice judge setting position is not
adjusted to the width of belt loop.
Belt loop is being caught.
Cause (2)
Fixing screws of gear, sensor installing plate,
etc. are loosened.
Sensor has broken.
Set value of [BD] (front) or [BE] (rear) of the
splice judge setting position is not adjusted
to the width of belt loop.
Checking order and adjusting procedure
Input the data value with the belt loop used.
Replace the belt loop with the correct one or input data with the belt
loop used.
Adjust the parts to the correct positions and fix the loosened screws.
Replace the sensor.
Replace the belt loop with the correct one or input data with the belt
loop used.
Adjust the parts to the correct positions and fix the loosened screws.
Adjust the backlash amount of the reduction gear.
Adjust the set value of [BD] (front) or [BE] (rear) of the splice judge
setting position.
Remove the cause of being caught from the belt loop.