Singer 9800 - Thread Tension and Functionality; Thread Tension Diagnosis; Presser Foot and Feed Teeth Controls

To
understand
the
correct
thread
tension,
sew
a
few
sample
stitches
at
different
settings.
Begin
with
a
tension
That
is
too
loose,
ie.
the
dial
set
at
“1
“.
The
lower
thread
will
lie
straight
and
the
ucpr
Thread
will
be
drawn
down
on
the
underside,
2.
If
you
set
The
dial
at
the
highest
number,
the
opposite
will
occur
and
the
seam
may
pucker.
3.
The
correct
thread
tension
is
provided
when
the
threads
in
terlock
in the
middle
of
both
lay
ers
of
material
oi
in
the
case
of
decorative sTitches,
on
the
un
derside.
Make
a
few
tests
on
a
spare
piece
of
the
material
you
are
going to
use
and
check
the
tension.
Thread
tension/Function
Tenso’i
of
the
lower
thread
For
most sewing
it
is
sufficient
to
ad
just
only
the
upper
thread
tension.
Rarely
do
you
need
to
adjust
the
lower
thread
tension.
If
it is
necces
saryto
adjustthe
tension
of
the
low
er
thread,
take
the
small
screwdriv
e
fit
it
in
the
larger
screw
on
the
thread
tension
spring
and
turn
it
not
more
than
1/10th
-
ofaturntotheleftif
/
the
thread
is
too
tight,totherightifit
is
too
loose.
The
feed
teeth
are
lowerea
when
you
press
the
button
.
Press
the
button
again
if
you
wish
to
raise
the
feed
teeth.
The
feed
teeth will
not
come
up
until you
begin
to
sew,
The
feed
teeth must be
lowered
when
sewing
buttons
and
for
free
hand
work.
A
recommendation
is
given on
the
lnfodisplay TM
for
each
stitch
or
ma
terial you
select.
The
presser
foot
pressure
is
adjust
ed
with
the
dial
on
the
left
side
of
the
machine.
The
higher
the
num
ber
the
more pressure
on
the
fab
ric,
i.e.
high
pressure
on
soft
fabric
results in
a
wa’ty
and
extended
seam.
When setting
the
symbol
tt
the
presser foot
pressure
is
totally
rele
ased.
This
setting
is
used
with
the
darning
foot (accessory).
crrec
cmc
nconeet
threcd
tension
Lowering
the
feed
teeth
Presser
foot lift
The
presser
foot
is
raised and
low
ered
with
the
presser
foot
lift.
Tte
presser
foot
must
be
lowered
when
sewing.
By
raising the
presser
foot
lift
as
far
as
it
goes
and
holding
it
there,
the
lift
height can
be
increased
by
sev
eral
millimeters.
This
is
useful
when
sewing
heavy
materials.
Presser
foot
pressure
12
I
;
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