104 72 63-26
27
The needle thread is not cut.
The bobbin thread is not cut.
The thread slips out the
needle eye when starting
sewing.
The needle thread bunches
up on the wrong side of the
fabric at the beginning of the
seam.
The tail of the needle thread
appears on the right side of
the fabric.
Skipped stitches at the be-
ginning of the seam due to
a too short tail of the thread
after thread cutting.
The fi xed cutter is dull.
The fi xed cutter knife is out
of position.
Skipped stitch before
thread cutting.
The thread cutter knife is
out of position.
The thread guide plate is
out of position.
The proper hook is not
used.
The needle to cutter cam
timing is too late.
The thread drawing lever is
out of position.
A too long tail of the needle
thread is left after thread
cutting.
The pre-tension is too
loose.
The needle to cutter cam
timing is too late.
The fi xed cutter knife is out
of position.
The auto tension release is
not enough.
The needle to cutter cam
timing is too early.
The thread drawing lever is
out of position.
The fi xed cutter knife is out
of position.
Replace or grind the fi xed cutter knife.
Adjust the position of the fi xed cutter knife .
Reset the needle at the proper angle.
Reduce the check spring stroke.
Adjust the needle to hook timing.
Adjust the stroke of the thread cutter knife.
Adjust the position of the thread guide plate .
Use the proper hook.
Adjust the needle to cutter cam timing .
Adjust the thread drawing lever position .
Adjust the needle to cutter cam timing .
Adjust the position of the fi xed cutter knife .
Tighten the pre-tension.
Adjust the needle to cutter cam timing .
Adjust the position of the fi xed cutter knife.
Adjust the auto tension release.
Adjust the needle to cutter cam timing .
Adjust the thread drawing lever position .
Adjust the fi xed cutter knife position.
Thread Cutter Troubleshooting