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Symptom, Cause/solution
Thread is twisted.
Needle is turned, bent or the point is dull.
Needle is installed incorrectly.
There are scratches around the opening in the
presser foot.
There are scratches on the bobbin case.
Using improper needle or thread for the selected
fabric.
A bobbin designed specifically for this machine is
not used.
The thread is tangled on the wrong side of the fabric.
Upper threading is incorrect.
Using improper needle or thread for the selected
fabric.
The upper thread is too tight.
The bobbin thread is incorrectly installed.
Bobbin thread breaks.
Bobbin is set incorrectly.
Bobbin thread is incorrectly wound.
There are scratches on the bobbin or it doesn't
rotate properly.
Thread is twisted.
A bobbin designed specifically for this machine is
not used.
Fabric puckers.
There is a mistake in the upper or bobbin
threading.
Spool cap is set incorrectly.
Using improper needle or thread for the selected
fabric.
Needle is turned, bent or the point is dull.
Thread tension is set incorrectly.
The pattern is not embroidered correctly.
The thread tension is incorrect.
The thread is tangled, for example, in the bobbin
case.
Skipped stitches
Machine is threaded incorrectly.
Reference
Symptom, Cause/solution
—
Using improper needle, thread or the fabric
prepared insufficiently for embroidering.
29
Needle is turned, bent or the point is dull.
29
Needle is installed incorrectly.
*
Needle is defective.
*
Dust or lint has collected under the needle plate.
29
Not embroidering
Needle is turned, bent or the point is dull.
22
Bobbin is set incorrectly.
Upper threading is incorrect.
26
High-pitched sound while embroidering
29
Pieces of thread are caught in the race.
Upper threading is incorrect.
A bobbin designed specifically for this machine is
not used.
25
There are needle holes or friction scratches in the
bobbin case.
The needle contacts the needle plate.
25
The needle clamp screw is loose.
22
Needle is turned, bent or the point is dull.
25
—
The handwheel feels sluggish when it is turned.
22
Thread is tangled in the bobbin case.
After Embroidering
Symptom, Cause/solution
25, 26
Thread tension is incorrect.
26
Upper threading is incorrect.
29
Bobbin is set incorrectly.
Using improper needle, thread or the fabric
29
prepared insufficiently for embroidering.
75
Thread tension is set incorrectly.
Bobbin thread is incorrectly wound.
Needle is turned, bent or the point is dull.
75
A bobbin designed specifically for this machine is
109
not being used.
The pattern is not embroidered correctly.
26
Thread is twisted.
Thread tension is set incorrectly.
TROUBLESHOOTING
Reference
29, 53,
65
29
29
29
109
29
25
26
109
26
22
109
29
29
109
Reference
26
25
29, 53,
65
75
22
29
22
—
75
115
5
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