Singer 20U33 - Adjustment of Tension

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
POSITIONING
THE
FEED
AND
FEED
LIFTING
ECCENTRIC,
FEED
FORKED
CONNECTION,
FEED
ROCK
SHAFT
CRANK,
FEED
LIFTING
ROCK
SHAFT CRANK
CONNECTING
ROD
AND FEED
LIFTING
ROCK
SHATT CRANK
If
for
any
reason,
it
is
necessary
to
make
sidewise
adjustment
of
the
above
parts,
it
should
be
adjusted
in
the
following
manner.
ADJUSTMENT:
1.
To
adjust
feed
and
feed
lifting
eccentric
in
relation
to
feed
forked
connection,
loosen
feed
and
feed
lifting
eccentric
position
screw
and
set
screw
and move
feed
and
feed
lifting
eccentric
to
the
left
or
right
as
required,
then
securely
tighten
the
screws
when
correctly
positioned.
Make
sure
that
the
feed
forked
connection
and
feed
and
feed
lifting
eccentric
is
free
from
binding.
(Refer
to
''TIMING
THE
FEED"
on
page
18
in
-regard
to
setting
angle
of
feed
and
feed
lifting
eccentirc
on
arm
shaft.)
2.
The
feed
forked
connection
should
be
set
squarely
to
the
feed
rock
shaft.
To
set
feed
forked
connection
in
correct
position,
loosen
feed
rock
shaft
crank
clamping
screw
and
move
feed
rock
shaft
crank
to
the
left
or
right
as
required,
then
securely
tighten
clamping
screw
when
correct
position
is
obtained.
(If
setting
angle
of
feed
rock
shaft
crank
on
feed
rock
shaft
need
to
be
reset
due
to
making
the
above
adjustment,
adjust
as
instructed
on page 15
under
"LENGTHWISE
SETTING"
of
feed
dog.)
3.
The
feed
lifting
rock
shaft
crank
should
be
set
so
that
""'the
feed
lifting
rock
shaft
crank
connecting
rod
would
be
square
to
the
feed
lifting
rock
shaft
and
also
function
without
binding.
To
set
in
correct
position,
loosen
crank
clamping
screw
and move
feed
lifting
rock
shaft
crank
to
the
left
or
right
as
required,
then
securely
"tighten
clamping
sere
...
(If
it
becomes
necessary
to
reset
the
setting
angle
of
feed
lifting
rock
shaft
crank
on
the
feed
lifting
rock
shaft
due
to
making
the
above
adjust-
ment,
adjust
as
instructed
under
"TO
SET
FEED
DOG
AT
CORRECT
HEIGI-fIW'
on
page
14.)
ADJUSTMENT
OF
TENSION
Tension
on
needle
thread
should
be
just
enough
to
set
stitch
properly
in
material.
For
ordinary
stitching,
a
correct
stitch
can
be
obtained
to
suit
the
work
in
process
by
varying
tension
on
needle
thread
only.
If
a
properly
balanced
stitch
can
not
be
obtained
by
varying
the
Deedle
thread
tension,
check
whether
or
not
the
thread
handling
parts
such
as
the
slack
thread
regulator,
thread
take-up
lever,
tension
discs,
etc.
are
smoothly
finished.
-
20
-