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CARE AND MAINTENANCE
Appendix
237
8
h
Insert the bobbin case so that the S mark
on the bobbin case aligns with the z mark
on the machine.
* Align the S and z marks.
a S mark
b z mark
c Bobbin case
i
Insert the tabs on the needle plate cover
into the needle plate, and then slide the
cover back on.
Adjusting the Alternate Bobbin
Case (with no marking)
The alternate bobbin case (with no marking) can
be easily adjusted when bobbin tension changes
are required to accommodate different bobbin
threads. To adjust the bobbin tension for
embroidery function, using the alternate bobbin
case (with no marking), turn the slotted-head (-)
screw with a (small) screwdriver.
■ Correct tension
See page 174 about the correct tension.
■ Bobbin thread is loose
Bobbin thread appears slightly on the right side of
fabric. If this occurs, turn the slotted-head screw (-)
clockwise, being careful not to over-tighten the
screw, approximately 30-45 degrees to increase
bobbin tension.
■ Bobbin thread is tight
Upper thread on the right side of fabric seems to be
lifting/looping and bobbin thread is not seen on the
wrong side of fabric. If this occurs, turn the slotted-
head screw (-) counterclockwise, being careful not
to over-tighten the screw, approximately 30-45
degrees to decrease bobbin tension.
Note
• Never use a bobbin case that is scratched;
otherwise, the upper thread may become
tangled, the needle may break, or sewing
performance may suffer. For a new bobbin
case (part code: XC3153-351 (green screw),
XC8167-551 (no marking)), contact your
nearest authorized service center.
• Be sure that the bobbin case is correctly
installed. Otherwise, the needle may break.
Note
• If the needle plate has been removed it is
especially important to reinstall the needle
plate and tighten the screws prior to
installing the bobbin case.
a
b
b
a
a Do not turn a phillips screw (+).
b Adjust with a screwdriver (small).
a Right side
b Wrong side
a Right side
b Wrong side
CAUTION
• When adjusting the alternate bobbin case, be
sure to remove the bobbin from the alternate
bobbin case.
• DO NOT adjust the position of the Phillips (+)
screw on the alternate bobbin case as this may
result in damage to the bobbin case, rendering
it unusable.
• If the slotted-head screw (-) is difficult to turn,
do not use force. Turning the screw too much
or providing force in either (rotational)
direction may cause damage to the bobbin
case. Should damage occur, the bobbin case
may not maintain proper tension.
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2
12
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