Brother EV1 - Incorrect Thread Tension; Tangled Thread on Wrong Side of Fabric

Troubleshooting
261
Maintenance and Troubleshooting
7
 Symptom
• The thread becomes tangled on the wrong side
of the fabric.
• After starting sewing, a rattling noise is made
and sewing cannot continue.
• Looking under the fabric, there is tangled thread
in the bobbin case.
 Cause
Incorrect upper threading
If the upper thread is incorrectly threaded, the
upper thread passed through the fabric cannot be
firmly pulled up and the upper thread becomes
tangled in the bobbin case, causing a rattling
noise.
 Remedy
Remove the tangled thread, and then correct the
upper threading.
1 Remove the tangled thread. If it cannot
be removed, cut the thread with scissors.
* Refer to “Cleaning the Race” on page 255.
2 Remove the upper thread from the
machine.
3 Correct the upper threading by following
the instructions of “Upper Threading” on
page 42.
* If the bobbin was removed from the bobbin case,
refer to “Setting the Bobbin” on page 40 to
correctly install the bobbin.
 Symptoms
• Symptom 1: The bobbin thread is visible from
the right side of the fabric.
• 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.
• 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.
a Wrong side of fabric
b Bobbin thread visible on right side of fabric
c Upper thread
d Right side of fabric
e Bobbin thread
f Upper thread visible from wrong side of fabric
 Cause/Remedy
 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 “Setting the Bobbin” on
page 40 to correct bobbin threading.
<With symptoms 3 through 5 described above>
The upper threading is incorrect.
Return the upper thread tension to the standard
setting, and then refer to “Upper Threading” on
page 42 to correct the upper threading.
Tangled Thread on Wrong Side of
Fabric
Incorrect Thread Tension
 Symptom 1  Symptom 3
a
b
c
d
e
a
c
d
e
f