SWF E-U901 - Failure to Detect Trimming and Return; Short Remaining Upper Thread After Trimming

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Failure to Detect
Trimming and
Return
Short Remaining
Upper Thread
After Trimming
① Poor connection of the
sensor connector
② Bad board
③ Faulty sensor and wrong
position of the return sensor
controller body
① Failure to separate the
upper thread since the entry
of the moving blade is too
fast or slow
② Inappropriate distance
between the moving blade
and the rotary hook
③ Inappropriate location of
the picker
④ Faulty operation of the
picker
■ Check the status of the
connector connection
■ Replace the board on the
rear side of the controller
box
■ Replace the sensor
■ Remove the foreign
materials around the sensor
■ Adjust the location of the
return sensor controller
body
■ Adjust the initial position of
the moving blade
■ Adjust the distance between
the moving blade and the
hook
■ Adjust the location of the
picker
■ Check the fuse on
the front side of the
controller box and replace it
■ Check the solenoid
connection terminal and
replace the solenoid
■ Check the connector
connection status and
replace the board on the
rear side of the controller
box
■ Check the rated
voltage of the fuse
1) For 3-phase
: 250V 15A
2) For 1-phase
: 250V 15A
Corrective Action and Check PointCause of TroubleType Remarks