Viking 2780 - Page 15

Maintenance
hints
Machine
does
not
properly
feed
the
fabric:
Feed
dog
might
be
lowered:
raise
it
by
pressing
the
feed
dog
lowering
button
upward.
in
most
cases
poor
sewrng
results
are
due
to
a
blunt
Stitchlength
regulating
button
is
on
0:
set
from
1 to
5.
or
damaged
needle.
Therefore
always
examine
the
needle
first
before
taking
any
other action.
The
seam
is
not
neat:
Thread
tension
is
incorrect:
adjust
thread
tension
(page
15).
Unattractive
stitches
—
unattractive
seams:
Wrong
thread
in
machine:
upper
thread
should
be
equal
The
needle,
thread
and
fabric do
not
correspond
—
or
somewhat
thicker
than
lower
thread.
make sure
that
a
needle
system
7051130
is
used.
Needle
Bobbin
case
incorrectly
threaded:
test
per
ill.
page
7/8.
incorrectly
inserted.
Correct
IS:
flat
side backward
Put
1—2
drops
of
oil
onto
the
hook
in
case
of
machines
and groove
needle
towards
you.
with
doble
rotating
hooks
(page
12).
Needle
is
bent
or
blunt:
take
a
new needle.
Bobbin
is
too
full or
irregular
bobbin
winding:
adjust
it
and
Needle
does
not
correspond
to
thread:
care
for not too
full.
Care
that
thread
is
wound
correctly.
table
page
10.
In
case
of
fabric
puckering
with
wide
seam:
locsen
upper-
and
lower
thread
tension
or
put
fine
silk paper
under
the
fabric.
Thread
breaks:
The
thread
may
be
too
tightly
tensioned:
readjust
tension.
Foot
control
of
motor
runs
hot:
Incorrectly
threaded:
thread
per
ill.
page 9.
The
electric
resistor
has
been
under
tension
for a
too
Thread
may
be
entangled
or
jammed:
set
It
free,
long
period:
take
your
foot
completely
off
the
pedal
Needle
eye
may
have
too
sharp
edges:
change
needle.
for
a
while.
Machine
runs
sluggishly:
Drive-belt
too
tight
or
too
loose:
correct
it.
Machine
is
dry:
oil
it.
Oil
is
hard:
place
machine
in
a
warm
room.
Oil
is
viscous:
put
some
petroleum
on
the
oiling
spots
and
let
machine
run
at
high speed
for
a
short
time.
Dirt
or
lint
have got
into
the
shuttle:
take
out
the
bobbin
and
bobbin
case
and
brush
clean
with
special
brush,
the
shuttle
itself
too,
see
page
13.
Bobbin
winder
is
engaged:
disengage
it.
14