Singer 20U33 - Maximum Zigzag Stitch Width Adjustment

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
6
_ Lower
needle
into
needle
hole
in
throat
plate
and
check
whether
the
needle
is
properly
centered
in·the
needle
hole.
1.
If
needle
is
not
properly
centered
in
the
needle
hole,
check
whether
the
notch
on
the
hexagon
head
of
the
zigzag
stitch
regulator
fork
eccentric
connection
pin
(Fig.
15)
is
located
at
top,
then
loosen
bight
and
needle
position
block
set
screw
and
adjust
bight
and
needle
position
block
to
the
left
or
right
as
required.
Securely
tighten
the
set
screw.
8.
Turn
machine
pulley
and
check
existence
of
sidewise
movement
of
needle.
If
it
is
found
necessary
to
make
readjustment,
it
should
be
made
as
instructed
in
item
5,
page
8.
B.
ADJUSTMENT
TO
OBTAIN
MAXIMUM
ZIGZAG
STITCH
WIDTH
(9
mm)
1.
Set
needle
position
selector
on
"center"
needle
position
and
stitch
width
regulator
for
maximum
stitch
width.
2.
Place
a
light
card
under
presser
foot,
turn
machine
pulley
and
make
light
needle
punctures
in
the
card
and
check
width
of
zigzag
stitch.
3.
If
maximum
stitch
width
of
9
mm
can
not
be
obtained
with
machine
set
as
instructed
above,
loosen
bight
amplitude
stop
plate
(right)
screw
and move
bight
amplitude
stop
plate
(right)
to
the
left
or
right
as
required.
Then
securely
tighten
set
screw.
Fig.
13
'
,
---------
--
C.
SETTING
THE
CENTER
NEEDLE
POSITION
1.
Set
needle
position
selector
on
11
center
11
needle
position
and
stitch
width
regulator
for
straight
stitching.
Place
a
light
card
under
presser
foot,
turn
machine
pulley
and make a
needle
puncture
on
the
card.
Then
set
stitch
width
regulator
for
maximum
stitch
width,
make
needle
punctures
on
the
card
in
the
same way
as
above
and
check
whether
the
left
and
right
needle
punctures
are
equally
distanced
from
the
center.
Fig.
14
'
'
2.
If
left
and
right
needle
locations
are
not
equidistant
from
the
center,
loosen
bight
and
needle
position
block
set
screw
and move
bight
and
needle
- 11 -