Baby Lock BLTA, Instruction & Reference Manual

Page: 177 / 204

TROUBLESHOOTING
175
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If the machine stops operating correctly, check the
following possible problems before requesting service.
You can solve most problems by yourself.
Visit us at “ www.babylock.com ”.
If the problem persists, contact your authorized Baby Lock
retailer.
Frequent Troubleshooting Topics
Detailed causes and remedies for common
troubleshooting topics are described below. Be sure to
refer to this before contacting your authorized Baby
Lock retailer.
Upper Thread is Too Tight
■
Symptom
* The upper thread appears as a single continuous
line.
* The bobbin thread is visible from the right side of
the fabric. (Refer to the illustration below.)
* The upper thread has tightened up, and comes out
when pulled.
* The upper thread has tightened up, and wrinkles
appear in the fabric.
* The upper thread tension is tight, and the results do
not change even after the thread tension is adjusted.
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
■
Cause
Incorrect bobbin threading
If the bobbin thread is incorrectly threaded, instead of the
appropriate tension being applied to the bobbin thread, it
is pulled through the fabric when the upper thread is
pulled up. For this reason, the thread is visible from the
right side of the fabric.
■
Remedy
Correctly install the bobbin thread. (page 40)
Tangled Thread on Wrong Side of Fabric
■
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.
a
Remove the tangled thread. If it cannot be removed,
cut the thread with scissors.
* Refer to “Cleaning the Race” on page 172.
b
Remove the upper thread from the machine.
c
Correct the upper threading by following the
instructions in “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.
TROUBLESHOOTING
■
Upper Thread is Too Tight
page 17
5
■ Tangled Thread on Wrong Side of
Fabric
page 17
5
■
Incorrect Thread Tension
page 17
6
■
Fabric is Caught in the Machine and
Cannot Be Removed
page 17
6
■ Untangling Thread from beneath the
Bobbin Winder Seat
page 17
8
a
b
c
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