White 535 - Adjusting Thread Tensions

ADJUSTING
THE
TENSIONS
Always
adjust
the
upper
tension
with
the
presser
foot
down,
as
the
tension
is
released
when
it is
raised.
To
increase
the
tension
on
the
upper
thread,
turn
dial
(Fig.
15)
to the
right,
or
clockwise;
to
decrease,
turn
to the
left.
The
higher
the
number
on
the
dIal
the
tighter
the
tension.
Before
adjusting
lower
tension
be
sure that
the
machine
is threaded
properly.
When
it is necessary
to
change
the
bobbin
tension,
turn the
small screw
(Fig. 17)
on
side
of
the
bobbin
case
clockwise
to tighten,
counterclockwise
to loosen.
Fig.
15
Fig.
16—A
Fig.
16-B
When
the
upper
and
under
tensions
are
properly
balanced,
a
perfect
stitch
will
be
formed
with
both
threads
interlocking
in fabric
(Fig.
16-A)
When
the
upper
tension
is
too
tight,
the
lower
thread
is
pulled
up
over
the
upper
thread
which
is
lying
flat
on the
fabric
(Fig.
16-B)
When
the
upper
tension
is
too
loose,
the
upper
thread
forms
loops
over
the
lower
thread
lying
flat
on the
fabric
(Fig.
16-C).
I
Fig.
16—C
Fig.
17