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Troubleshooting
Incorrect thread tension
Symptoms
• Symptom 1: The bobbin thread is visible from the
right side of the fabric. (Refer to illustration below)
• Symptom 2: The upper thread appears as a straight
line on the right side of the fabric.
• Symptom 3: The upper thread is visible from the
wrong side of the fabric. (Refer to illustration below)
• Symptom 4: The bobbin thread appears as a straight
line on the wrong side of the fabric.
• Symptom 5: The stitching on the wrong side of the
fabric is loose or has slack.
Symptom 1
c
a
e
1 Wrong side of fabric
2 Bobbin thread visible from right side of fabric
3 Upper thread
4 Right side of fabric
5 Bobbin thread
6 Upper thread visible from wrong side of fabric
Cause/remedy/check details
Cause 1
The machine is not correctly threaded.
<With symptoms 1 and 2 described above>
The bobbin threading is incorrect.
Return the upper thread tension to the standard setting,
and then refer to "Installing the bobbin" on page 22 to
correct the threading.
<With symptoms 3 and 5 described above>
The upper threading is incorrect.
Return the upper thread tension to the standard setting,
and then refer to "Threading the upper thread" on page 24
to correct the upper threading.
Cause 2
A needle and thread appropriate for the fabric are not
being used.
The machine needle that should be used depends on the
type of fabric sewn and the thread thickness.
If a needle and thread appropriate for the fabric are not
being used, the thread tension will not be correct, causing
wrinkles in the fabric or skipped stitches.
• Refer to "Fabric/Thread/Needle Combinations" on
page 27 to check that a needle and thread
appropriate for the fabric are being used.
Cause 3
An appropriate upper tension is not selected.
Select an appropriate thread tension.
Refer to "Adjusting the Thread Tension" on page 38.
The appropriate thread tension differs depending on the
type of fabric and thread being used.
106
Symptom 3
c
a
e
*
Adjust the thread tension while test sewing on a
piece of scrap fabric that is the same as that used in
your project.
Note
• If the upper threading and bobbin threading are
incorrect, the thread tension cannot be adjusted
correctly. Check the upper threading and bobbin
threading first, and then adjust the thread tension.
• If the bobbin thread is visible from the right side of
the fabric
Press
in the manual adjustment screen to
decrease the tension of the upper thread.
• If the upper thread is visible from the wrong side of
the fabric
Press
in the manual adjustment screen to
increase the tension of the upper thread.
Fabric is caught in the machine and cannot
be removed
If the fabric is caught in the machine and cannot be removed,
the thread may have become tangled under the needle plate.
Follow the procedure described below to remove the fabric
from the machine. If the operation cannot be completed
according to this procedure, instead of attempting to remove it
forcefully, contact your nearest Brother authorized service
center.
Removing the fabric from the machine
Immediately stop the machine.
a
b
Turn off the machine.
c
Remove the needle.
If the needle is lowered into the fabric, turn the
handwheel away from you (clockwise) to raise the
needle out of the fabric, and then remove the needle.
• Refer to "Replacing the Needle" on page 28.
d
Remove the presser foot and presser foot holder.
If the thread is entangled on the presser foot, remove the
entangled thread, and then raise the presser foot lever to
remove the presser foot. Otherwise, the presser foot may
be damaged.
• Refer to "Replacing the Presser Foot" on page 29.
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