Brother EF4-B956C User Manual
INSTRUCTION
FOR
MANUAL
BROTHER
MODEL
EF4-B956C
Ultra High Speed Overlock
BROTHER
NAGOYA, JAPAN
INDUSTRIES,
Sew
ing Machine
LTD.
CONTENTS
1.
Specifications ...................................................................................................... .
2. Features
3. Operation .......................... .
A)
B)
Ci
...............................................................................................................................
.
..
········
Se\\'in,L(
Motor,
Setting
speL'd
motor
U))
.............
pulley
....................
. .
and
helt
..........................................................................................................
············
··············.
""
..................
D) Oiling. drnining and maintt•mmr:e ................................................................................... .
E)
Necdk• r:oolt•r
F)
~lachi•w
G)
In~talling
dt'l"iLt'
.......................................................................................................................
"P"·ating
di•·cction ........ . .
..............................................................................................
needlt• ................................................................................................................................
II) Thn•ading ............................................................................................................................ .
I l
Stitr:he~
.1)
ThrL'<td
\.
1
'
:t
KJ
Adjustnwnt on
L)
Adjusting
?\I) Adjusting stitch lt•ngth ....................................................................................................................... .
?-;)
Adju,Ling diffcrc.,tial feed ................................................................................................................. .
4. Adjustment................................................... . ............................................. , .......................................
.................................................................................................................................... ..
ten~i4>n
Adju~tnll'nl
Adju~ting-
Adju~ting-
............................................. .
of
thrL•ad
thr<.'ad
thrl'ad tl'nsion screw .......................
pre~~un·
~!itch
width ............................................................................................................... .
take-up .................. .. . ....................................................................... 7
takl'·ltp and thre;td guide ... .. . .............................................. 7
..
of presser foot: Installing and remo\"ing
ft•ed
..................................... 7
dogs: and Height
Al llt•ight of lll'l'dlt• .................................................................................................................................
Bl Relation
C l
ln~talling
Dl
ln~talling
El
Relation of needk• with under and
Fl
ln~talling
5.
Trouble shooting ............................................................. .......................................................................
Al
Thn•ad break ...... , ..............................................................................................................................
B) Skip
C)
:\"ecdlc
D)
ftnperfect chaining-off ......................................................................................................................
El
Improper thn•ad tension ...................................................................................................................
Fl
l'ttor trinllning perfonnance .............................................................................................................
(;)
Irregular
Ill
Em•"ice
I)
1\"l'L'<llt•
6.
Parts list
hl't\l'l'L'll
llt't•dk• and llll<kr loopt•r ........................................................................................
nt•edil' guard rear........................ . ............................................................................
lll'l'dk guard front........................ . ..........................................................................
on·r
l11opt•r
.................................................................................
and nwinlt•mtncl' of lmin•s .................................................................................................
~!itching..........................................
brt•a\;;
....................................................................................................................................
~\itches
..............................................................................................................................
nT;ukb
along
>titchc~
........ ............................. .........................................
. ................................................................................
produces too large holes ....................................................................................................... U
.............................................................................................................................................. Fi
·················· 1
..................
····· ...........
...........
. . . . .
..
......
. . . . .
..
......
............ 7
of
feed dogs H
..
.............
2
~
2
'>
..
,,
..
,,
-1
:J
;1
r;
r;
H
9
9
10
lf)
Hl
10
II
11
11
1
1~
1~
1:!
12
1:1
13
13
1:1
J.J
r-..
·.
'
~
1 . Spec ifications
Name
Dimensions
Type
Stitch
Sewing speed
Stitch
Stitch
Height
Main
Oil
Needle
Needle
Feed
D
Knives
Installation
Qf this mach
from
length
width
of
bearings
bar
regulator
ifferential
presser
stro
feed
foot
and
ke
regulator
in
e,
there arc the
Ultra
11
igh Speed Overlock Sew
355mm X 240mm X 270mm
Oust-proof,
El3, El3A.
6.
500
lmm-:l6
1 mm- 5mm (for sub-class -
~-5mm
totally
El2A
~
!it
c hes
per minute
mm (
by changing the n
5mm
rods
i\11
important
Viscosity:
Capacity:
2-
Imm
DC X l (
Push-button type.
By lc•,·cr moving in \'
even in
11
ppcr knife: LLo\\'er knife: flat shrqwd
Semi-submergl•d
following
parts arc
CS
20.62
800-l,OOOcc.
::
7,
::
sew
ing operation.
S
llh
enclosed
for
sub-class
at
9.
::11.
scak
shapc·d
-ciasSt'S ;1\'aiJabil'.
type
·0
1 & -
II
eed
le
of
plwsphcr bronze alloy also nilless nK•lal
:{7.H(
·
::1-1.
on
fact• plate l'l'pn•scnts stitch length
l'rlical
direction: gathering and
car
bicil' 1
ske
l
in~
)
platr
::1
6)
ip1wd
:V
09)
fachi
nt•
slrl'lrh
ing can bt· obta in
and
ba
ll
bearings
ed
'
.
.
'
speed
0\'credging
- OIC
6.500spm 6.500spm 5.500spm
Equipped Equipped Equipped
Bl ind·hemmin!-!
-
09C
----
Ty
pe
1---
S
ub-cl~
ss
:\.laximum se\\:fng
1'\eedle cooie /
1'\o.
of
needle
L
l\o.
of
threads
Sewing
Needle
Height of
Stitch length
Differential
(gat
width
(Bightl
pres~er
feed
h e
rin
~·stretching)
ratio
f
not
t
-~
:l
:3.
4.
5mm
DCX I OCx l
5m
m
I mm- 3.6mm
lm
1.5-0.7
-1 -
:~
3. 4 mm 5mm
5m
m
m - 3.6mm
L1-0.i
I
~
---+
lmm
St•rging
11C
-
2
>C
<I
I
:1mm
5mm
tl.i
1.2
2.
Features
*
The
extensive design of various components and lubrication system and also the addition
cooler device on this machine assure the normal operation of maximum high speed of
minute, without any troubles.
A)
Combined lubrication system of forced lubrication by geared pump, sprash lubrication and oil wick
lubrication.
B)
Unique design of needle
to its every working part.
C) Exclusively designed over looper mechanism has made the use of light alloy possible and also ensures
smooth lubrication to the end.
D)
Holders
bronze alloy.
E) Major
be
*
The
upper knife is L·shapecl to
carbide tip promises
are
made of
moving
exposed to outside dusts.
parts
long durability of the knife.
* Stitch can be easily regulated
change the eccentrics when
* Differential feed can be easily adjusted
This also applies for the instantanem1s
bar
mech;mism has lessend its weight
dur<1lmin
are
you would like to change the stitch length.
to decrease the weight. Main rods and bushings
perfectly lubricated inside the totally enclosed main body, so they will never
make
the threading and replacement
by
push-button, with the scale on the face plate, thus
hy
the lever for gathering nr stretching without soiling yollf hands.
differentit~l
adjustment
as
well
as
assures forced lubrication
of
the needle easy. Besides, the
ohtt~inahle.
are
of
the needle
6,500
stitches per
made of phospher
it
is unnecessary to
* Ample space on the cloth plate allows easy sewing operation.
* Oil level in the oil reservoir
* Lubrication can be easily checked through the oil window
is
shown on the special oil gauge
on
the front side of the machine.
in
the top co\'er.
* Optional needle cooler emmres perfect sewing operation even with synthetic materials and threads at the
6,500
high speed of
* Colour combination
can be lessened.
*
As
differential ratio can be adjusted upto
such
as
knitted fabric.
stitches per minute.
of
TAN-BEIGE is
in
well harmony with your modern factory. and operator's fatigue
2.!i.
this is suitadle for sewing of cloth which is ease
to
spread
~
~
3.
Operation
A. Sewing speed
Maximum speed of this machine is
the new machine should be operated
After this
This is desirable for machine's long life.
B.
Motor,
ll Use a clutch motor.
phase) and MD·354 (three phase).
2)
Use M-type V
3)
Machine speed (s.p.m.), diameter of motor pulley and length of motor belt is related to the following table.
running-in period, you may operate the machine
motor
Stitches
minute
5,500
6,000
6,500
pulley and belt.
1/2
-belt._
per
Hp, 2 pole, single
6.500
Pulley
120mm
130mm
140mm
stitches per minute. For the first
at
about 5,000 s.p.m. so that all the working
at
maximum
or
three phase. Our motor available is Models
Outside diameter of pulley
50
"'
V-belt Pulley V-belt
39
inch
39
inch
39
inch 120mm
100
actual working hours. however.
of
6,500
and
length of V -belt
lOOmm
llOmm
parts
are
stitches per minutaninute.
MD-344
60
"'
38
38
38
well run-in.
(single
inch
inch
inch
2
C.
Setting
This
lhis
machi
If
you have purchased this machine
to Fig.
the bottom board
With
bot
tom
holes
up
machine
1.
our
on
i
~
normally
ne
arc contained
which shows the
lO
the
Brother clutch motor. l\1oclels
board. ho\\'C\'Cr.
the bottom board.
~ct
up
together
parts
tab
le
as
if
you would u
as semi-submerged
with
the machine h
as
head only.
necessary
semi-submerged typ
for
selling up this machine and also the measurement
1\ID-:~..t..t
se
and
with
other brand c
lyp
e. Necessary
ead.
mak
e table top
e.
MD-35-1.
as
there is
lut
ch motor. pl
parts
and accessori
per attached table sheel. al
no
anxiety
lo set the machine to the
ease
mak
es
for
e sure to have
set
to
tin
so
mounl
prop
g up
refer
er
"'
I
:;;
I
~
I
___
Bolt hole for
.....:
::I
r
bottom
D. Oiling, draining
-
*
-
Jij , Center
25
; Screw
e,
2~7
-l
d
t "'
26i
board
and
maintenanc
of
• .
l
I
~
275
~
V-belt
for
cushion b
Centre of
' machine pulley
I I
1
~
I
(Fig. 1)
e
Oil is drawn n
Before opera
(shown in Fig.
ase
...::-_
Collar
for
bottom
Bottom board _
ul
tin
g the mac
21
~
board
of
the machine
and pour o
pri
or to its shipment.
hin
e.
therefore, remove the oil
il
into
lhe
machinl' using the funn el.
Figures are in
mitimeter
filt
er cap
(Fig. 2)
(Fig. 3)
Oil lcn :l should
fig.
3.
Th
e oil resen·oir consists of two tacks partilioned by a f
takes sometime before the o
o
il
is up to the required le\'el a
o
il
if oil
le,
check the oil gauge for oil level be
he
up
to
the upper
il
levels of both
·el is below the upper line of the
- 3 -
lin
e of the oil gauge sho
little after
for
e opera
lank
match. Check
the o
il
is poured. Add
oil
gauge. Be sure
tin
g the machin
ilt
"'n
er so
e.
in
il
if
lo
(Fig
(Fig.
. 4)
5)
When op
era
firsl time after unpacking it ur after it
hm;
been
out
li
me. add
point
\"
ou do not ha vc lo add oi I into them
:>
sho\\'11
if tlw machim• is
/\l tlw
L'nd
cd'
100
al'lual hours operation. running -
oil.
Tlwreaflcr.
oil rcqu
draining oi
irL'd
dwnge
is
about
l.
it
once in about
HOO-
J.OOOcc.
Lhr
Cl' mon
Hcmm·e the sere\\' sho\\·n
The machine l'lnplnys a geared pump for l
major mn,·i
mmmled
ga
uzc. <'l c.
This is dt·si
n).!
about 1
r:1
hi~·
parts.
ll is recommend
\\'in• a YL'Hr
fqr
lot
i
tg
for ck•aning-
I i
fL·
ui I he machi II<'.
ed that the oil rcscn ·oir
of
ling-the machine for the
of oil for a long period of
or
6 drops of oil into
in
Fig . . ] and Fi
operated
in
period. change
ths
USl'.
Th
hL'
forced lubr icat ion to
its
imwr surf
ac<'s.
e quantity
oi lin
g.
5.
d
ail~·
.
in
Fig.
be
pump. \\'in•
ti
~
Llw
of
for
its
dis·
(Fig. 6)
E. Needle coo l
\\
'ith machinl'
In
order
to
get the good se\ring result on tlw resin treated materials such as polyeste
etc
..
or \\'ith
cooler
1. Operati
the synthetic threads. such
de,·ice.
ng
procedure
er
mock'!
device
"·C".
/T
it
is equipped wit h the needle
as
nylon
<Jnd
I) i'<lUr
ank
2)
:l)
the
siliwnc
(:lOcc
in
capacity) then open the
If
this machine is brand ne\\' or nftcr il has been
time. it
fe
the fc'lt
Th
oi
tak
e~
ll
on tlw needle gua rd. th
so
as
e cock
l.
1111
nanwly on the slo\\'
It-rials applit
cook
r de,·icc.
r.
jersey. a
Dacron. it will be advantageous to usc the needle
oil into the lank
about
10
-15 mmut
en
to thoroughly sat
1st bl' closed \\'hen the machim' do not re
sp~cd
•d
ancl also \\'hen
appro~imatelr
cock
sho\\'n
es
to satur
app
ly several drips of silicone oil on
urate
ate
before
SC\\'
operation on cott on thread.
rou
do not use
-1 S 1
in Fig.
7.
oul
of usc for long
the silicone o
ing ope ration.
quir
e lhc s
th<•
machine.
11
cotton
nd
tricot.
e<lp~ci
il
into the
ili
cone
ma·
tr
(Fig. 7)
- -1 -
2.
Sewing
When you would
such materials
·3 .
Silicone
Silicone oil
50cc silicone oil could
on
4. Pro
5.
Rem
the
sewi
per
installation
oval
capabi
oil
to
......
ng
(Ft!i
of
the top
at
work.
lity
wit
sew
the
the
high
be used
Yisco:.ity:
be
on
8)
cove
h needle
synthetic
speed
500
operated
the mach
C D
I I
I I
r
coo
ler
materials,
of
6,500
st
cs
apprn:--:imately
ine
1)
In
sta
Felt
Fig
.
8.
Tub
e guide B should be instal led
fully inserting
th
e tube C is
2)
Posi
Tlw
hole is
jersey,
itch
es
per
half a month
llation
support is
tion
of
position
of
higher
tricot,
minute.
of felt s
installed
the
tube
fixt>d.
tank
tank should
than
tht• oil levc•l
elc.,
il
can
of
sC\\'ing
upport and
on n
ee
into tht-
be set
be
ensured
operation
tube
dle
guard
on
needle
hole
of
up
at
as shown
guid
e
front D as
plate
the
needle
the
in Fig.
to
sew
upt
alth
ough
support
guard D because
positicni th
7.
o 6 plies
it d
epe
shown
deck
with
at
~he
\'
of
nds
in
ent
F. Machine oper
The
proper
G.
I
nsta
,.
<"'
1\.
{
lli
ng
operating
needle
ating direction
direction
of
this
machine
(Fig.
is
clockwise
\\'hen
shown
he
L
you pull tlw tube Point
in
Fig.
separated. thus the
ogt•tht•
r
with
9)
as
viewed
Hole
' Needle set
9.
the
top
from
tank
covt.•r.
the
screw
tank
pull
and
ey
I\
tn
felt
portions
can
be cletatchable
side.
the left
as
will
(Fig.
Turn
the
pulley until
its highest position, l
shown
and
as inclicalPd
in Fig.
moYc
10
presser
with
pressing
foot
arrow
the
needle
ower the
by the
arm
mark.
R
bar
lifter l
to
(Fig. 10)
is
raised
thumb
the
direction
eve
finger
tn
r A
New, loosen
the
you, then
hole a
needle c
up.
-
!j
-
nee
ll the
After
11)
dle
insert
lamp
this check. tighten
the
with
way
whether
needle
its
the
up ch
set screw
grooved
need
le
ecking
the
side
into
the
needle
the screw.
and
facing
needle
the hole
is all
holding
toward
clamp
in
the
the
way
H.
Threading
Pass
the
threads through the eyes of
(1) Under looper
Before passing
until the needle is
in
Fig.
12.
When you threads to the
accessory
Draw out the thread approximall' :icm from the tip of loop('r.
box.
(2)
Over looper
these thread, open the front covN, cloth plate,
at
the
highest position, and the
eres
cotton
(3)
Needle
of thread
stand
I{Uidcs.
then please do in
pr~ger
loopers and need!t•. pleaSl' usc with \h(' tweezer
fnot
and
arm
the
following order;
thread
take·up
outward.
coYer, turn
Pass
the
threads
the
as
puHer
shown
in
the
(Fig. 1 2A) (Fig.
Two tl1reads Three threads
l:SECare
should be taken for threading of two threads and three
cases
are
existed as in
Figure
A and
!.Stitches
El3
for B956-0l
El3A
for 8956-09
E12A
for
El3
or
E13A can
(Fig. 13)
~.EJ:!A
(Fig.
8956-11
14)
Three
threads
Three
Two
threads
be
obtained \\'ith with readjusting the adjusting
El3A
overeding tension (Figure
threads
blind-hemming tension (Figure
serging tension (Figure
In
<:ltst' of
looper thread
In
case
looper thread tension
threads
B.
13)
1.Jl
!;))
scrt>w.
EJ:J,
the
needil'
tension and o\·er looper
of
El:lA. tlll(kr looper thread tension is
an<\
thrL•ad
the
tension is the
thread
net•dle
thread
128)
because diffpn•nccs between both
strongest
tension is the \\'eakest.
till'
tension is the
then tlw under
strongest. tht'n m·er
weakest
In
case of
~El2A
(Fig.
15)
looper thn•;1d tension.
El~i\.
the
needle
thread
-6-
tension is tht' wcakt>st. then the under
J .
Th
read
tension
Thread
lhe
pos1t1<>n
the
following
_
t
~nsio
n
may
change dcpcncling on the type
of
the thread take-up and
manner.
(Fig 1
6)
of
thr
thr
ead
guides.
1.
Adjustment
'['., tiJ.!htcn the needle
loo~en
To
Th
e thread
tension. (Fi
Not
e:
Thread taketyp<.· (Figure Al
I ype (Figure
If
il.
tak<:·up in
g.
ead
and
materials se
it
shoulcl change considerabl
of thread
rai
se
]())
up
will
is
B)
is
take-up
thread, lower the needl
the take-up.
tlw
middle position is the standard thread
be used in
for
B9
56·01 and B9
for B956-
B
wn. s
such way
ll.
titch
56
width,
stitc
y.
make
adjustment
e thread
that
thr
-09,
and two threads
h length.
take-up.
ee
threads
in
2.
Adjusting
looper thr
ead
take-
up and thread
(Fig. 17)
guide
t [
As shown in
pos
iti
on of the n
standard positi
thread
for
thr
th
e position of under looper
guide shows
thr
ead and
As sho
po~ition
standard position of the looper
thread take-up and
for the
Fig
. 1
7.
<H
the high
eed
le.
it
is the
on of the looper
take-up and thread guide,
ee
threads use. In this
in
13
is for cotton
J\
for
synthetic
wn
in
Fig
. 18.
al
of
the n
eedle.
thr
two
threads use.
case.
thr
thr
ead.
the highest
it
is the
ead guide,
est
ead
(Fig. 1 B)
3.
Adjusting
Aft
er complet ion
tension sere\\'
Be careful not to
n
ece
!'sary or cau
thread
for
se
tension
of
the abo,·e-memionecl adjustment
fin
e adjustment. Incorporate an approp
turn
the thread
screws:
the screw in or o
take-up lo feed
ut
excessi,·e
thr
of the thread guides, and thread take-up,
riat
e adjustment
ly.
becau
se
it
may
eads too ex
-
7-
cessively.
turn
the thread
for
the above "Stitches'' (Page
tighten the threads more than
14
).
K.
Adjustment
and
~··
~
_
1~
1
on
the
Height
D
)~
of
(Fig 19)
,;.
~
feed
l·:-.:-.o....:
c
t-l.il,
---
'
pressure
dogs:
,;
,•
of
presser
The
pr~.·~~urc
presser
To
install llw diffcrl•ntial
To install
tighten the
foo
t adjust
the
foot:
of
SCJ'l'\\'
Installing
tlw
presser foot can
in~
scrL'\\' shown in
main
feed
1-:.
(Fig.
or
removing
be
adju!'tcd
FiJ.!.
19.
feed
do
g :\ . ti
cloJ.!
C and chaininJ.!·nff feed
20)
!-{hte
feed
by
n the scr
dog
menn!'
ew
s:
tl(
the
JL
dog 111
.
l.
Adjusting
E
A
B
(Fig.
(Fig. 2 1)
stitch
(Fig.
20)
windth (bight)
22)
A
The
standard height
point comes
in
its upward tra\'clling, the top
ce
surfa
Stitch wtidth is dependent on
of
the ncccllc plate.
Adjust the
1)
Hemm·e the upper knife.
2)
TiJ.!htcn the set screw A temporarily
mar
obtained.
;{)
Loosen the screw B and adjust the contact of the upper and
lower
holding block to
..J)
Tighten
it
to the
5)
Loosen the set screw A and please make sure
knife
Fix
to
of the ncc•dk plate. (Fi
trimmin~
come
kni\·cs
the screw B and install the upper knife
I<J\\'Cr
may
llw
low<'r knif<'
of
the f
eed
clogs
fit
perfectly to the
of
g.
cloth
width
as follows: (Pig.
to
the point where desired
as
shown in Fig.
eit
her l
eft
or
knife.
contact \\'ith upper
by
tiJ.!htening the
is
such that when the nccdlr.
lop
surface
the
feed
2
1)
trimming
23
by mm·ing the upper
right.
knife
of
the needle plate
clogs
is
l
e\'C~l
\\'idth and the tongue
22)
so
that
the lower kni.fe
trimming
by
the
~et
spring
scr
<'\\'
width
whil
that
A.
with
may
knife
e pressing
the
lower
pressure.
the
be
Lower
knife
23)
(Fig.
- R
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