Brother International VX-940 Users Manual - English - Page 19

Thread, Tension

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Thread Tension It is important that tension of upper and lower threads is equal to avoid puckering of material or other problems. It is recommended that a test sample be made before sewing. TENSION UPPER THREAD TENSION To regulate upper thread tension, merely turn thread tension dial with your fingers after lowering the presser foot. THE HIGHER THE NUMBER, THE TIGHTER THE TENSION. To increase tension: Turn the dial to right to higher number. To decrease tension: Turn the dial to left to lower number. NOTE: When sewing the zigzag stitch, upper tension should be less than straight stitch sewing. Increase Decrease Tension spring screw LOWER THREAD TENSION Lower thread tension is adjusted for general use at the factory before shipment, but when sewing extremely thin or heavy material, it also requires adjusting the lower thread tension. To regulate the lower thread tension, turn small screw on the tension spring of the bobbin case with the small screw driver. To increase tension: Turn the small screw clockwise very slight- ly. To decrease tension: Turn the screw coun- terclockwise very slightly. -17-

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Thread
Tension
It
is
important
that
tension
of
upper
and
lower
threads
is
equal
to
avoid
puckering
of
material
or
other
problems.
It
is
recommended
that
a
test
sample
be
made
before
sewing.
TENSION
Increase
Decrease
Tension
spring
screw
UPPER
THREAD
TENSION
To
regulate
upper
thread
tension,
merely
turn
thread
tension
dial
with
your
fingers
after
lowering
the
presser
foot.
THE
HIGHER
THE
NUMBER,
THE
TIGHTER
THE
TENSION.
To
increase
tension:
Turn
the
dial
to
right
to
higher
number.
To
decrease
tension:
Turn
the
dial
to
left
to
lower
number.
NOTE:
When
sewing
the
zigzag
stitch,
upper
tension
should
be
less
than
straight
stitch
sewing.
LOWER
THREAD
TENSION
Lower
thread
tension
is
adjusted
for
general
use
at
the
factory
before
shipment,
but
when
sewing
extremely
thin
or
heavy
material,
it
also
requires
adjusting
the
lower
thread
tension.
To
regulate
the
lower
thread
tension,
turn
small
screw
on
the
tension
spring
of
the
bobbin
case
with
the
small
screw
driver.
To
increase
tension:
Turn
the
small
screw
clockwise
very
slight-
ly.
To
decrease
tension:
Turn
the
screw
coun-
terclockwise
very
slightly.
—17—