White 7234 User manual

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POLARIZED
PLUG
CAUTIOfJ
To
reduce the
risk of
electric
shock, this appliance
has
a polarized
plug (one
blade
is wider than the
other).
This plug
will fit in a
polarized outlet
only
one way.
if
the
plug does
not
fit fully in the
outlet,
reverse
the plug. If
it still does
not fit, contact
a
qualified
electrician to install
the proper outlet. Do
not
change the plug
in any way.
OVERLOCK
SEWING
MACHINE
Record in
space
provided below the Serial
No.
and Model
No. of
this appliance.
The Serial No.
is
located Rear of arm.
The
Model
No. is
located Rear of
arm.
Serial
No.
_____________________________
Model
No.
7234
Retain
these numbers for
future reference.
Foot
Controller Model
YC.482E for use with Overlocking
machine Models
SL-1A,
SL-2,
634, 634D,
634DE, 834DW, 3000, 3400, 3400D, 3404, 3404D,
6300, 6600,
and
6700.
This
sewing
machine
is for Household Use

IMPORTANT
SAFETY
INSTRUCTIONS
When
using
an
electrical
appliance, basic
safety
precautions
should
always
be
followed,
including
the
following:
Read all
instructions
before using
(this
appliance).
DANGER——To
reduce the
risk
of
electric
shock:
An
appliance should
never
be
left unattended
when
plugged
in.
Always
unplug
this
appliance
from
the
electric
outlet
immediately after using
and
before
cleaning.
WARNING——To
reduce
the
risk
of
burns, fire,
electric shock,
or injury
to
persons:
1.
Do not
allow
to
be used
as a
toy.
Close attention
is
necessary
when
this
appliance
is
used
by
or
near
children.
2. Use
this
appliance
only
for
its intended
use
as
described
in
this
manual.
Use only
attachments recommended
by the
manufacturer
as contained
in
this
manual.
3.
Never
operate this
appliance
if it
has
a
damaged
cord
or
plug,
if
it is
not
working
properly,
if
it has
been
dropped
or
damaged,
or
dropped
into
water.
Return the
appliance
to the
nearest
authorized
dealer
or service
center
for
examination,
repair,
electrical
or mechanical
adjustment.
4. Never
operate
the
appliance
with
any
air
openings
blocked,
Keep
ventilation
open
ings
of
the
sewing
machine
and
foot
controller free
from
the
accumulation
of
lint,
dust,
and
loose
cloth.
5.
Never drop
or
insert
any
object
into
any
opening.
6.
Do
not
use
outdoors.
7.
Do
not
operate
where
aerosol
(spray)
products
are
being
used
or
where
oxygen
is
being
administered.
a
To disconnect,
turn
all
controls
to
the
off (“0”)
position,
then
remove
plug
from
outlet.
9.
Do
not
unplug
by
pulling on
cord.
To
unplug,
grasp
the plug,
not
the
cord.
DANGER
1.
Always
unplug
before
relamping.
Replace
bulb
with
same
type
rated
15 watts.
2.
Do
not reach
for
an appliance
that
has
fallen
into
water.
Unplug immediately.
3. Do
not
place
or
store
appliance
where
it
can
fall
or
be
pulled
into
a tub
or
sink.
Do
not place
in or
drop
into
water
or
other
liquid.

WARNING
I
)c.ep
hnger
away
from
aU
moving
parts.
Specia’
care
is
required
around
the
sewing
m4(
t1Ifl fltd1t
Atway
w.u
itw proper
needle
plate.
The
wrong
plate
can
cause
the
needle
to
break.
1k)
not
ue
bent
noedIs
4
Oo not
pull
or
pu6h
tabnc
while
stitching.
It may
deflect
the
needle
causing
it
to
lii
Ldk
wi1ch
the
sewiriçj
machine
ott
(“0”)
when
making
any
adjustments
in
tne
needle
erei, 5uch
as
threading
needle,
changing
needle,
threading bobbin,
or
changing
pressur
toot,
etc.
C
Always
unplug
sewing
machine
trom
the
electrical
outlet
when
removing
covers,
lobr4catfng, or
when
making
any
other
user
servicing
adjustments
mentioned
in
the
tostruction manual.
I Never
operate
on
a
soft
surface
such as
abed
or
couch where
the
air
openings
smiy
be
blocked.
SAVE
THESE
INSTRUCTIONS

CONTENTS
1.
NAMES
OF PARTS
1
2.
PREPARATION
FOR
SEWING
2
2—i.
Connecting
Power
Cord
2
2-2.
Setting
Telescopic
Thread
Stand
2
2-3.
How
to Change Threads
3
2-4.
Replacing
Needles
4
2-5. Threading
5
2-6.
Preparation
for
Sewing
and Checking
6
3.
FOUR
THREAD
OVEREDGING
STITCH
USING
2
NEEDLES
7
3-1.
Before
Sewing
7
3-2.
Presser
Foot
Litter
7
3-3.
Beginning
and
Ending
of
Sewing
7
3—4.
Adjustment
of The
Presser
Foot
Pressure
8
3-5.
Thread
Tension
Adjustment
9
3-6.
Adjustments
for
Size
of Bight
11
3-7.
Stitch
Length
Adjustment
12
3-8.
Sewing
for
Curved
Seams
12
4.
THREE
THREAD
OVEREDGING
STITCH
USING
ONE
NEEDLE
13
5. ROLL
HEMMING
14
6.
CORDED
OVERLOCK
15
7.
REPLACING
THE CUTTING
KNIVES
15
8.
CHANGING
THE
LIGHT BULB
16
9.
LUBRICATION
16
0.
TABLE
OF
SEWING
MATERIALS,
NEEDLES
AND
THREAD
17
1.
ACCESSORIES
18
2.
SPECIFICATIONS
19

1.
NAMES OF
PARTS
1. Spool
pin
2.
Presser
foot
lifter
3.
Pressure regulator screw
4.
Telescopic
thread
stand
5.
Thread
take up
lever
6.
Thread
tension
support
7.
Thread tension dials
8,
Front
panel
9.
Side
cover
10. Stitch length
adjuster
11.
Presser
foot
12. Bite width
adjusting
dial
13.
Upper
knife
14.
Front
cover
15.
Handwheel
(Right side of
machine)
1
2
3
46
78
/
/
/
910
1
12
—1

2.
PREPARATION
FOR SEWING
2-1.
Connecting
Power
Cord
Connect
foot
controller
and
power
cord
CD
©.
Before
plugging
in
your
machine,
be sure that
voltage
is
same
as that
of
your
machine.
(written on
a
plate
at
back
of
machine).
*
Specifications
vary
from
country
to country.
Put
power
switch
on
machine
and
turn
on
sewing
light.
Always
switch
off
or
unplug
machine when
not
in
use.
The
more
you press
foot
controller
the faster
the
machine
runs.
When
the power switch
is
turned
off,
the machine
will
not
operate
even
by pressure
on
the
foot
controller.
2-2.
Setting
Telescopic Thread
Stand
Extend
the
telescopic
thread
stand
to its full
height,
then
turn
it
until
the
shaft
clicks
into
its
locked
position.
—2-—

2-3. How
to
Change Threads
The
machine
is
supplied
with
thread but
the
fol
lowing
is an
easy
way
to
change
them:
(1)
Cut
the
thread in
use
near the
cone
spool
(behind the
telescopic
thread stand).
Place
the
new
thread
on
the
spindle
and
tie
it
to
the
end
of
the
original
thread.
(2)
Lower the
presser
foot
lifter
to
lift
up
the
press
er toot.
(3)
Set
tensions
to
0 so that
the
thread knot
can
pass
through
smoothly,
draw out
the
looper
thread
until
the thread
knot
comes to
about
10
cm
past
the
presser
foot.
(4)
When changing
the
needle thread, cut
off
the
thread
knot
before it
reaches
the
eye
of
the
nee
dle
to
avoid
bending
the
needle as
the
knot
is
pulled
and
caught in
the needle’s eye.
To
make
the
above
threading
easier,
use
tweezers.
Tie
threads
Cut
thread
I
4
Needle
eye

Cover
the
spool
with
the
NET”
as chemical
fibers
(fibres)
and
the
like
are
easily frayed.
When
using
a
real
type
thread
spool,
insert
the
spool
adapter
(supplied
with
the
machine)
(as
shown).
2-4.
Replacing
Needles
Replace
needles
in
the
following
way:
Note:
be
sure
to
take
out
the power
supply
plug
before
replacing
needles.
(1)
Bring
needles
to
their
highest
position
by
turning
handwheel
towards
you.
(2)
Loosen
the
needle
clamp screw
and
remove
the
two
needles
together.
(3)
With
the
flat
side
away
from
you,
insert
the
new
two
needles
together
into
the groove
of
needle
bar
as
far
as it
will
go.
Use
“HA
x
iSP
(705/130>”
#11(80)
or
#14(90)
or
ones
the
same
as
for
home-use
sewing
machine.
Needle
clamp
screw
J
—4—

2-5.
Threading
When
threading
the machine
from the
beginning,
threading
must be
carried out
in the
following
sequence:
First: Lower looper
threading (A)
Second:
Upper looper
threading
(B)
Finally:
Needle threading (C,
D)
(1)
Lower
looper threading (A)
Push the
front
cover
to the right,
and
fold
it down
towards
you.Take the thread
drawn from
the spool
and pass
it,
through guide
of the thread stand
and
then,
in
order;
through
guides)
4)
(s
and thread
tension
dial
6 . (Fig.
A)
Pass the thread through
guides
1
S
and
(.
Bring the
lower looper
to the far left
position
by
turning
handwheel towards
you, and
pass
the
thread
through lower looper
thread guide
ii
Then, move
the
lower
looper
slightly
to the
right
by turning
the
handwheel
towards
you.
(Fig.
B)
To
thread
the
hole
of lower
looper
, insert the
tip
of
the
looper
threader
into the
looper slot from
the righ of
the lower looper,
hook the
thread onto
the
threader
and draw
it through
the
looper in the
direction
of
the arrow.
Then
thread
the hole
of
lower
looper
I3
using tweezers.
Cut
the thread
leaving
about 10cm (4”) of
spare
thread. (Fig.
C)
I
if
Fig.
B
\
,“
\ ,
Fig. C
—5—

(2) Upper
looper threading
(B)
•
Bring
the
upper
looper
to
its
lowest
position
by
turning
handwheel
toward
you.
•
Draw
thread
from
spool and
pass
it, through
guide
of
the thread
stand
and
then,
in
order,
through
guides
(Fig.
A).
•
Thread
the
hole
of
upper
tooperç{j)using
tweez
ers.
Cut
the
thread
leaving
about
10cm
(4”)
of
spare
thread
(Fig.
D).
•
Close
the front cover.
(3) Right
needle
threading
(C)
•
For
ease
in
threading,
push
the
upper
knife
holder
screw
from
A
side
with
the forefinger
of
your
left
hand
*
and
grasp
the
right
end
of
the
holder
C
and
turn
it
in
the
direction
of
arrow
a:
with
your right
hand.
(Fig.
E)
•
Take
the
thread
drawn
from
spool,
and
pass
it
through
thread
guide
©—®,
then
thread
to
the
right-hand
needle’s
eye®
from
front
to
back.
Cut the
thread
leaving
about
10cm
(4”)
of
spare
thread.
(Fig.
A)
(4)
Left
needle threading
(D)
•
Take
the
thread
drawn
from
spool,
and
pass
it
through
thread
guides
2-
4
6,—8
and
thread
the
left-hand
needle’s
eye
from
front
to
back
(Fig
A,
E).
2-6.
Preparation
for
Sewing
and
Checking.
•
Check
that
no
thread
slips
off
or
snaps.
•
Confirm
that
the
upper
knife
moves
against
the
lower knife
correctly
by
turning
the
handwheel
slowly
towards
you.
If
it
is
not
correct,
check
if
there
is
any
fabric
or
waste thread
between
knives.
Turn
the
handwheel
towards
you with
your
right
hand
to
check
that
the
thread
winds
around
the
stitch
finger
of
the
needle
plate.
If
the
thread
doesn’t
wind
around
the
stitch
finger
of
the
needle
plate,
check
it
any
threads
are
threaded
incorrectly.
II
Fig.
D
R
±
As
the upper
knife
is
sharpened,
care
should
be
taken when
moving
this
part.

3.
FOUR
THREAD
OVEREDGING
STITCH USING
2
NEEDLES
3-1.
Before Sewing
After
threading
s
completed,
and when
the
threads
are
not
wound
around the
stitch
finger,
gently
draw
Out
the
tour threads
under
and behind the
presser
foot, and
turn the
handwheel
towards
you
by
hand
two
or
three times
to
make
the
thread
wind
on
to
the needle
plate.
3-2.
Presser
Foot
Litter
For
setting average
material,
there
is
no
need
to
lower
the
presser
foot
lifter.
When
beginning
to
sew,
push
the
material just
in
kont
of
the presser
foot and
it
will be
fed
through.
For
the
thick
material,
lower
the
presser
foot
lifter,
place
the material
under
the
presser
foot,
then
raise
the presser
foot
lifter.
3-3.
Beginning and
Ending of
Sewing
(1)
Beginning
to
sew
Just
put your
left
hand on the material
to
push
it
slightly until the tip
of
the fabric
comes
exactly
behind
the
presser foot.
—7—

(2)
Ending
of
sewing
Make
chain-stitches
at
the
end
of
the
sewing
to
prevent
the
thread
from
untying
and
to
prepare
for
the next
sewing.
Draw
the
finished
fabric
gently
backwards
and
to
the
left
as
the
machine
is
operating
and
make
chain-stitches.
This
is
called
chain-stitch
sewing.
Then
cut the thread
2
—5cm
(1-2w)
from
the
pies
-
ser
foot.
* Do
not pull
it
out roughly
as
the
needle
will
bend
and
break.
3-4.
Adjustment
of
the
Presser
Foot
Pressure
The
presser
foot
pressure
is
pre-adjusted
for
materials
of
medium
(standard)
thickness.
Adjustment
is
necessary
only
when
you work
on
very
thin
or
very thick
materials.
Accordingly,
sew
thinner materials
with
less
pres
sure
and thicker
materials
with
more
pressure.
Increase
the
pressure
of
the
presser
foot
by
tightening the
adjustment
screw.
j
I
Tighten
Loosen
j
—8—

35.
Thread
Tension
Adjustment
f
Set
the
balance
of the
tension
as
weak
as
possible.
Balance
of the
Loopwer
thread:
When
the
lower
looper
thread
is pulled to
the
top
of
material,
loosen
tension
dial
, counter-
clockwise.
(or
tighten
tension
dial
®
clockwise.)
When
the
upper
looper
thread
is
pulled
to
the
underside,
tighten
tension
dial
‘
clockwise.
(or
loosen
tension
dial
‘4.
counter-clockwise.)
(1)
Correct
tension.
• Lower
looper
thread and
upper
thread
should
be
well
balanced
with
same
tension.
(Both
loop
er
threads
should
make
crosses
at
the
edge
of
the
fabric.)
• Needle thread
should
not
be
slacken,
or
pulled.
(2)
Unbalanced
upper looper
thread wraps
round
and
over
the
back:
Tighten
the thread tension
of
the
upper
looper
(Dial
3)
or
loosen
the
thread
tension
of
the
lower
looper
(Dial.
‘l
Right
side
Uppcr
looper
thread
Left-nand
needle thread
Rigrt-nand needle
thread
‘
Lower
Tighten
Loosen
I

(3)
Unbalanced
lower
looper
thread
wraps
round and
over the
face:
Tighten
the
thread
tension
of
the lower
looper
(Dial
4
)
or
loosen
the
thread
tension
of
the
upper looper
(Dial
3).
(4)
Unbalanced
left
needle
thread
too loose:
Tighten
the
thread
tension
of
the
left needle
(Dial
‘U)
or
loosen
both
looper
thread (Dial
and
4}).
(5)
Unbalanced
right
needle
thread
too loose:
Tighten
the
thread
tension
of
the
right
needle
(Dial
2
).
Lower
thread
Upper
looper
thread.
Right-hand
needle
thread
Tighten
Loosen
Loosen
needle
thread
Tighten
Right
side
Upper looper
thread
Left-hand
needle thread
—10—

3-6.
Adjustments for
Size
of
Bight.
• AdjuM
the size of the
bight
from
4.2mm
(0.16”)
to
60mm (023”)
according
to
the kind
of
material.
I
• The
standard
bight size is
4.5mm
(0.17”)
IL: ..
• Open
the
side cover to adjust
the bight
size. -
(1) If the cutting width is narrower
than
the bight
size, turn
the
bite width
adjusting dial
to the direc-
.R
tion of
arrow. (To bigger
number) —
_-- //
4k
(2)
If the cutting
width is
wider
than
the bight size,
turn the bite width
adjusting
dial
to the
direction
of
the arrow. a
smaller
number)
The right
figure
shows
that
the size
of the bite
7
between
the left
needle and
the edge
of the
material
4.5mm.
—11—

3-7.
How
to
Adjust
Stitch
Length
The
machine
is
pre-set
to
a
2.5mm
stitch length
for
regular
seaming and
overedging. You may
adjust
the
stitch
length
from 1mm
(Narrow
rolled
hemming)
to
5mm
by
one-touch
of
the stitch
length
adjustment
lever.
+
For
normal
overedging
set
the
stitch length
from
2,5mm
to
5mm.
A stitch
length
less
than
2.5mm
is
used
only
for rolled
hemming.
3-8.
Sewing
for
Curved
Seams
For
a
neat
and clean
finish
of
curved seams:
For
inside
curves,
guide
the fabric
gently
with
the
trimming
line
of
the fabric
under
the
right
front of
the
presser
foot,
applying
pressure
to
the
fabric
with
your
left hand,
at
the same
time,
apply
a
little pressure
in
the
opposite
direction
with
your
right
hand as
shown.
For outside
curves,
apply
pressure
in
the
opposite
directions
of
the
above.
—12—

4.
THREE
THREAD
OVEREDGING
STITCH
USING
ONE
NEEDLE
Though
this
machine
is made
mainly
for
4
thread
stitch
overedging
using 2
needles,
three-thread
stitch
overedging
using
1 needle
can
be
easily
operated
by
just
removing 1 needle.
(1)
By
removing
the right needle.
Three-thread
overedging stitch using
1 needle for
as
wide
as a
4-thread overedging stitch using
2
needles can be
achieved.
Use
the left thread tension.
(Dial
(j)
).
The
bite
width is
normaly 4.5
mm.
(2) By removing
the
left
needle.
The right
needle
sews
with a
narrow
width bite.
Use the
right
thread
tension.
(Dial
2
)
The bite
width
is
normaly
2.5
mm.
—13—

5.
ROLL
HEMMING
Roll
hemming
is
achieved
by
adjusting
the
thread
tensions
so that
the fabric
is
overiocked, and
folded
under
to
1.5
mm in
width.
It is ideal
for
use with
thin materials.
(1) Remove the
left needle.
(Sew
only
with
the
right
needle)
(2)
Change
the
presser
foot and
the
needle
plate
for roil
hemming.
For
roil
hemming
sewing,
use the
presser
foot
marked
“B”
and the
needle plate
“B’ (The
presser
foot “A”
and
the
needle
plate
“A”
are
for
normal
sewing).
(3) Set
the
bite width
between 4.5and
5.5.
(4)
Set
the stitch
length
adjuster
to
1.
(5)
The
standard
thread
tensions
are
as
follows:
Dial©:
Needle
thread
1 —4
tension.
Dial
©:
Upper
looper
thread
1 — 4
tension.
Dial
®:
Lower
looper
thread
5— 8
tension
For roll
hem
sewing,
pass
the
nedle
thread
to
the
left
side
(solid
line)
of
thread
guide
®
illustrated.
[For
normal
sewing,
pass
it
to the
right
side (dotted
line) of
thread
guide
®.]
At
the
begining
of
sewing,
gently
pull
the
end of
the
thread chain.
For
roll hem
sewing,
pull
the
material
gently
towards
the rear
of
the
machine,
and
you’ll
get
the
neater
stitches.
(1)
—14—

6.
CORDED
OVERLOCK
Corded
overlock
can be used to
strengthen stitches
when
joining
elastic
materials
such as
knitted
fabrics.
There
are
two
ways
of corded
overlock.
(1) Place
the
slightly wide
cord
(about
3mm)
under
the
iight
needle,
and sew on.
(2)
Sew
a
narrow cord,
positioning it
on the edge
of
the
overlocked
stitch.
7.
REPLACING
THE
CUTTING KNIVES.
The upper
knife
and lower
knife are made
of a
special
long-lasting steel
and will
seldom have
to
be
replaced. However,
when
they do not
cut the
fabric
even
though
they
are
set
in the right posi
tion, replace them
in the
following way:
Before replacing the
knife,
be sure
the power
supply plug
is take
out.
Move the front
cover
to
the right,
then
open
it
toward
you.
(1)
Replacing the
ower
knife:
Loosen the lower knife
clamp
screw
and change
the knife for
a
new one. Align
the
top of the
lower
knife
with
the top of the
needle
plate.
(2)
Replacing
the
upper
knife:
Move
the upper
knife
to
its
lowest position
by
turning
the
handwheel
towards
you.
Loosen the
upper
knife screw,
while
holding the
upper
knife.
Change
the
knife
for a new one.
Check
if
the
biting
position
A of upper
knife is
positioned
downwords
O.5—1.O from
the top
of
biting
position
of lower
knife.
Tighten
the
upper
knife
screw.
I-
plate
—15—