COMPUTER-CONTROLLED HIGH SPEED LOCKSTITCH BAR TACKING MACHINE
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Trouble
Cause
Corrective measures
7.Threads
break at
time of
thread
trimming
The moving knife has
been improperly
position
Correct the position of the moving knife.
8.Uneven
length of
the needle
thread
The tension of thread
take-up spring is too low.
Increase the tension of the thread take-up spring.
9.The length
of needle
thread
does not
become
short
The tension of thread
tension controller No.1 is
too low.
The tension of thread
take-up spring is too
high
The tension of thread take
–up spring is too low and
motion is unstable.
Increase the tension of thread tension controller
No.1.
Decrease the tension of thread take-up spring.
Increase the tension of thread take-up spring and
lengthen the stroke as well.