White 734 - Adjusting Thread Tensions; Adjusting Fabric Pressure and Feed Dog Height

CONTHOLS:
ADJUSTING
THREAD
TENSIONS
Always
adjust
the
upper
thread
tension
with
the
presser
toot
down,
as
the
tension
is
released
when
it
is
raised.
To
increase
the
tension
on
the
.upper
thread,
turn
tension
control
to
the
right.
To
decrease,
turn
to
the
felt.
Before
adjusting
the
tension
be
sure
that
the
machine
is
threaded
property.
It
is
seldom
required
to
adjust
the
bobbin
thread
tension,
however,
when
necessary
to
change
bobbin
thread
tension,
turn
small
screw
on
side
of
the
bobbin
case
clockwise
to
tighter,,
counterclockwise
to loosen.
When
both
tensions
are
property
balanced,
a
perfect
stitch
will
be
formed
with
both
threads
interlock
ing
in
fabric
(A).
When
the
upper
tension
is
too
tight,
the
bobbin
thread
is
pulled
up
over
the
upper
thread
which
is
lying
flat
on
the
fabric
(B).
When
the
upper
tension
is
too
loose,
the
upper
thread
forms
loops
over
the
bobbin
thread
lying
flat
on the
fabric
(C).
When
the
upper
and
bobbin
thread
tensions
are
balanced
but
fabric
is
puckered
in
sheer
fabrics,
both
tensions
are
too
tight.
loosen
both
tensions
evenly.
It
is
recommended
to
adjust
the
tension
balance
with
a
medium
stitch
length.
In
case
of
satin
stitching
for
buttonholes
and
embroidery
slightly
loosen
the
upper
thread
tension.
ADJUSTING
PRESSURE
ON
FABRIC
AND
FEED
DOG
HEIGHT
•
General
Sewing
Usually
for
normal
sewing,
except
for
sewing
on
very
heavy
and
bulky
fabrics,
the
center
pin
(B)
of
the
pressure
control
should
be
at
its lowest
position,
with
the
feed
dog height
control
at
“UP”
position.
For
above
exceptional
fabrics,
reduce
half
the
pressure.
To
reduce
half
the
pressure,
press
the
outer
ring
(A)
of
the
pressure
control,
then
press
the
center
pin
(B)
down
again
to halfway.
fr
(A)
(B)
(C)
Top
tension
too
tight
Fabric
Pressure
on
fabric
Feed
dog
height
Top
tension
too
loose
Ordinary
fabric
of
less
elasticity:
Heavy
end
bulky
fabrics
Half
Up
Medium
and
light
weight
fabrics
Full
Up
Very
stretchy
fabrics
and
knits:
Heavy
and
bulky
ones
Half
Up
Medium
and
tight
weight
and
Full
U
sheer
ones
p
C
Mending
and
Darning
In
order
to
move
the
fabric
freely
in
any
direction
for
darning
and
mendinq,
release
the
center
pin
(B)
completely
by
pressing
down
on
the
outer
ring
(A).
Turn
the
feed
dnq
height
control
to
“DOWN”
position,
which
drops
the
teed
dog
well
below
the
needle
plate,
To
return
the
feed
dog
height
to normal,
turn
the
control
to
“UP”
position.
18
‘9