Thread Tension - Brother EX-660 Operation Manual

NCBC2000.book Page 29 Thursday, October 21, 2004 4:32 PM
k Pull the fabric to the left side of the machine,
and then pass the threads through the thread
cutter to cut them.
a Thread cutter
Memo
● When the foot controller is plugged in,
(start/stop button) cannot be used to start or
stop sewing.
● When sewing is stopped, the needle remains
lowered (in the fabric). The machine can be
set so that the needle will stay up when
sewing is stopped. For details on setting the
machine so that the needles stay up when
sewing is stopped, refer to "Changing the
needle stop position" (page 10).
■ Sewing reinforcement stitches
When sewing stitches other than straight or zigzag
stitches that are secured with reverse stitching,
pressing (reverse/reinforcement stitch button)
sews reinforcement stitches, 3 to 5 stitches on top
of each other.
1
a Reverse stitching
b Reinforcement stitching
Memo
● Whether reverse stitches or reinforcement
stitches are sewn depends on the stitch that
is selected. For details, refer to "Stitch
settings" (page 52).

Thread tension

The thread tension will affect the quality of your
stitches. You may need to adjust it when you change
fabric or thread.
■ Correct tension
■ Upper tension is too tight
■ Upper tension is too loose
2
Memo
● We recommend that you do a test sample
on scrap of a fabric before you start to sew.
Correct tension is important as too much or too
little tension will weaken your seams or cause
puckers on your fabric.
1
a Wrong side
2 b Surface
c Upper thread
d Lower thread
3
4
Loops will appear on the surface of the fabric.
1
a Wrong side
b Surface
c Upper thread
2
d Lower thread
e Loops appear on
3 5
4
Solution
Reduce the tension by turning the upper
tension-control dial to a lower number.
4
Loops appear on the wrong side of the fabric.
5
1
a Wrong side
b Surface
c Upper thread
2
d Lower thread
e Loops appear on
3
4
Solution
Increase the tension by turning the upper
tension-control dial to a higher number.
4
2
surface of fabric
wrong side of
fabric
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