Brother MA4-B972C User Manual
INSTRUCTION
For
MANUAL
BROTHER
MA4-B972C
High Speed
BROTHER
Safety
NAGOYA
Stitch Over
INDUSTRIES,
JAPAN
loc k
Machine
LTD.
CONTENTS
1.
Specification ··· ··· ···· ·· ···· ···· ··· ·· ·· ······ ······ ······· ·· ····
2.
}.'eatures · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·. · ... · · · · · · · · · · · · · · · · · · · · · ·. · ... ·. · · · · · · · · · · · · · · · · · ·
:~.
Operation······························································································································
A)
Sc\\·ing Speed·
B)
:\Iotor, motor
C)
Setting
D)
Oiling, draining and maintenance ..... .... .. .. .. .. .. .. ... ...... ...... ...... .... .. ..
I~)
1\eedle cooler device
I•')
l\Iachine operating
up
(;) Installing needles
'J'hreading
II)
I )
Stitches······························································································································
.l
)
'I'hrL~ad
1.
Adjustlnent of thread take-up ...... · ..... ·
2.
Adjusting double chain stitch needle thread guide
:~.
Adjusting looper thread take-up and thread guide for over lock
4.
Adjusting looper thread take-up and thread guides for double chain stitch ..... .. .. ......
5.
Adjusting thread tension screws
K)
Adjustment on pressure of presser foot: installing and removing feed dogs: and height of feed dogs 8
L)
Adjusting stitch \\·idth ·
l\,1)
Adjusting stitch length
1\)
Adjusting differential feed
..
··· .. ·· ..
pu1Jey
·············
and belt
.... ·· .. · ..... ··· ... ··· ... ·
.........
· ....... · · ·· ... ··· ·
· ........ · .... · ... · .. · · · ·· · · ..... · .... · · .... · · ........ ···
...........................
direction·······
..........
·· ..... · ... ··· ··· ... .... .. ...
.. ···
..............................................................................
............
........................................................................................................................
tension · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
..............
.......................... · ......................................
..................... · ..
............
······
· ..... · ·· .... ··
................................
.................
··· .. ·· .. · .... ··
.. · ....................... · .............................
..............
····
...............................
............
...... ...... ... ... ...
· ...... · .... · ... · ... .. .. .. .. .... ..
......................................
.............................................
· .... ·
............ · ........ · ..............
..................
..................... · ··
··· ......... ··· .. · ... ·
· ........ ·
·.. .........
............
...............
............
..
· · · · · · · · ·. · · 2
·····............
............
..........
· ...
.........
· .. ·
.... .. ...... ...... ...... ... 4
·................................
............
..............
......... ...... ... 6
..
· · · · · · · · · · · · 7
· ..... · ........ · ..... 7
·........ .... .. 7
stitch.................................
· .... · ·
........
· .. ·
·..
............
.................
...........
...
..................
··· ...
·· · · .. ·· · · ..... ···· ·· ...
· ...... ·· 3
... 3
.........
......
· .. · 8
··········
1
3
3
5
6
6
7
H
H
9
10
10
4.
Adjustn1ent · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
1\)
I Ieight of needles ........ ·· .... ·
B)
I~L'lation
C)
Installing needle guard · ·· ··· ·· ·· ·· ···· ·· ·· · ··· ·· · ··· · ····· ···· ····· ··· ··· · ·· ··· ·· ·· ·· · ·· ·· · ··· ··· · · · · ·· ·· · · ·· ··· ··· · ·· ·· · · ··
D)
i\Iatching needle guard and needJe..... .... .... ..
E)
I~L·Iation
F)
I~L'lation
between needle and under looper
of needle with under looper and over looper
between needle and double chain stitch looper ·.. .........
(;) Installing double chain stitch needle
II) Installing and maintenance of
5.
'I' rouble shooting
i\)
·rhread
I~)
Skip
C)
1\eedle
IJ)
hnperfect chaining-off ... ···· .... · .. ·· .... ·· .... ·· .. ··· .. ··
E)
Improper thread tension .. ·
F)
Poor trin1n1ing perforrnance .. · · .... · ... · ..... · .... · ·
breaks
stitching···················································
breaks
(;) Irregular stitches
............
··· ··· ······ · ·· ··· ·· ·· ·· ······ · ·· ··· · ·· ···· ·· ···· ··· ·· ······ ···· ·· ··· ······ · ·· ······ ······ ··· ······ ······· ·· ···· ··
······ ·· ···· · ·· ··· ·· · · ·· ·· · · ·· ·· · ··· ·· · ··· ······ ········· ··· ··· · ·· ··· ···· ·· ··· ···· ·· ··· ·· ·· ·· ·· ·· ·· ·· ···· ······ ···
........................................................................
II) Excessi\·e wrink1es along stitches ...... ··· ....... ··
I ) 1\eedlcs produce too large holes··· ...... ···
............
· .... · .. ·
............ · .............. · ..
....................................
guard...........................................................................
knives..................................................................................
· ·· ...... · .... · ... · ..... · .... ·
..
· · · · .... · · .. · ..... · .... · ·
............................
· .... ····· .... ·
·.... .... ......... ...... ... .. .... ......
..........
..............
......... ... .. .... ... .. .. .. .. .. ..... ...... .... ..
................................................
.........
.... .. ... ...... ......... ...... ...
....................................
....
······························································
...................
...................
· ... ·
··
..
..
....................... · ..
··· ......... .........
· .... · ... · .... ···· ...
· ..... · .. · · · · ..
· .... · ... · ....... · ·
.......................................
................................................
······
...........
·········........................
..............
·· .... ····· .... ·
............
·.......................
··
· ·
..........
· · ... · · .. · ·.. ...
....................
···· ·· ......... ...... Iti
· .... · ...
...
·.. ...
11
11
II
11
11
12
12
13
13
I-I
1-1
1-1
I-I
l;j
15
15
16
I6
1. Specifications
:\a
me
Dim
ensions
Typ
e
Stitch
form
Usc
Sc"·
i ng
speed
Stitch
length
Stitch
width
!I
eight
of
prcs;;er
foot
Lubrication
\lain
hearing;;
and
Oil \' i;;co,;ity:
.i\
ecd
lc
:\
eed
le
F
eed
Di
fferential
bar ;;trok
regulator
e
feed
regulator
l
~niye
,;
In
stallation
ll
igh
:{S5mnl
Dust-proof.
E13
&.
0\·ercdgi
other
6.000 s
l.rmm-:~.6mm
:\cx•clle g-auge:
(h
·credg-e: :J.:)nun
:lmm
.\utomatic
wick.
rod
;;
.\11
important
Capacity:
~-lmm
DC
' l (
I>\
I ·
l'
ush-buttnn
1:~·
le\'l'r
111
sew in!,!
l '
ppcr knife: I.-shaped
l.m\·
er
Semi-;;ubnwrgcd (\l
;;up
port
speed
D1
types of sc\\·
titches per
13
knifl':
safety stitch
>-.
2·10nlm X
oil-proof.
2. I·:I
:{A
ng ;
111d
blind
(7-1;)
2.
lubrication
part;;
C~
20.62
~00
I.OOOcc.
::1
1.
::I
I. ::16!
(::II. ::1-1.
tn>e.
nln\
·in
.l!
operation.
flat
machine
o\·erlock sc,,
270mm
totally
&.
Dl2. E 12i\
-hem
ming
ing
in
general
minute
sti
tches per inch!
:t :Jmm
by
changing-
by
.l!<'ared
arc
of
at
:ri.~t
for
::
16)
sca
le on
in
,·ertical
carb
sh;qK·cl !'tl
achine
head
. Only oil
·ing
enclosed
&.
IJ
I2 si
type
of garments.
the
needle
pump
pho;;pher
oYerlock
for
face
dire
ide
'l'
l
head
double
plate
ctions:
tipped
i;;
in;;tallcd
l>r<III
,;titch
chain stitch
rcsen·oir i;; located
machine
multaneous
lmitwcars:
plate
plus
;;pra;;h
Zl'
alloy
lubrication
;d;;o oille,;;;
represent,; ,;titc h
gathering
on
and ;;tr
the
bottom
belo,,·
scwmg
Joint
length
etchi
board
the
seaming
and
ml'lal
ng
table
on s
lubrication
and ball
r<lll Ill' "l>tainl'd
on
which
top
.
lcc,
·cs
b~·
hearing-
cushion
and
nil
;;
L'\'l'll
e<tn
or
thi;;
machine.
there
arc the
following
;;ub-cla;;;;c.;;
a\'ailabl
e.
- l -
SUB-CLASS
LIST
AND EXPLANATION
ON
THE MEDALLION
Overcdgc
Needle
Sewing
Sub-cia~~
Needle
--
-~-----
Overedge bight
Sewing width t
No._
~
No. of
-------
Differ~~nt~a~~ed
_
~eec~:_coolc~------1-----
U~e
I
-----
2.
Features
The
device on
gauge
---
--·--
-------
-----~11~!11
of
nc<:_dles_ _ ____
. A
thread~
··-----------
_ratio _ _ _
-
cxtcn~ive
design of various components and lubrication system and also
this model assure the normal
_ _ _
1
f
-----
----------
___
--~--
H ........ 4
-----------
_ __
1.5-0.~-
Equipped
For
----
-
3mm
........
:)
-
thin work
----
operation
__
__
of
hight;:{l~nlT\\\\\C\\\1\T\\\\1\\\Im
gauge - !
width
_
maximum
any troubles.
A)
Combined lubrication system of forced lubrication by
B)
Unique design of needle
every
working
C)
Exclusively designed over looper mechanism
lubrication to
D)
E)
Holders
Major
are
moving
part.
the
made
parts
of duralmin
end.
bar
mechanism
to
decrease
are
perfectly lubricated inside the totally enclosed
has
weight. Main rods and bushings
lessened its weight
has
geared
made
the use of light alloy possible and also ensures smooth
exposed to outside dusts.
*The
upper knife is L-shaped
to
make
the
threading
and replacement of the needle easy. Besides the
tip promises long durability of the knife.
*Stitch
*Differential
*Durable
*Thread
*Ample
*Oil
*Lubrication
*Needle
*Colour
can
be easily regulated by push-button. with the scale on the face plate, thus it is-unnecessary to
the eccentrics when you would like
feed
can
be easily adjusted by the lever for
This
also applies for
the
instantaneous differential adjustment obtainable.
chain stitch looper's movement in
amount
of
clearance
between the looper and needle according to the size of needle.
tension of the double chain stitch looper can be easily adjusted without opening the cover.
space on the cloth plate allows easy sewing operation and if you want. double chain stitch with edge
cutting
level
work
can
be obtained without using the overedging mechanism.
in
the oil reservoir is shmn1 on the special oil
can be easily checked through the oil window
speed of
cooler device
6,000
combination of
stitches
ensures
per
minute.
TAN
perfect sewing
-BEIGE is
to
change the stitch length_
forward-backward
in
operation
well
harmony
even with synthetic
gathering
gauge
in
with your modern factory, and
be lessened.
*As
differental radio can be adjusted up
such
as
knitted fabric.
to
2.5.
this is suitable for sewing of cloth which is
\j_\j_lj_\j~
----
-3C
3mm
-··-
--~
.
--·-
5mm 5mm
-
-·
-------
8mm
-·.
.
--
2 2
--
5
--~
--------
4 4
--
---
1.5-0.7
~-------
- - -
---.
\,l\j\,l\jU\._,_'.Ju_'/
--
-------
-5C
5mm
lOmm
1.5-0.7
Equipped Equipped
medium
----
work
high speed of 6,000 stitches
pump,
sprash
as
lubrication and oil wick lubrication.
we11
as
are
main
or
stretching
direction
can
For
medium heavy
the
addition of
the
per
minute. without
ensures forced lubrication to its
made of phospher bronze
body, so they will never be
without soiling your hands.
be adjusted to obtain the proper
on the front side of the machine.
the top cover.
materials
and
threads
operator's
-
--
5
work
needle cooler
a11oy.
carbide
change
at
the high
atigue
ease
to
spread
~
-
~
......_
can
2
3.
Operation
A.
Sewing
speed
lVlaxtmum speed of thts machine is 6,000 stitches per minute.
the new
thts runnmg-m
destrable
B.
I) Use a clutch motor,
2)
3)
machme
should be
penod.
~'OU
for machine's long life.
Motor,
motor
pulley and belt.
l/2 H p,
1\;'lD-344
(single phase) and MD-354 (three phase)
Use M-type V -belt.
Machine speed (s.p.m.),
operated
may
operate
2 pole, single
diameter
at
about 5,000 s.p.m. so
the machine
or
three
of
motor
pulley and length of
at
maximum
phase. Our
For
that
the first
all the
100
actual working hours, however.
working
parts
are
speed of 6.000 stitches per minute.
motor
motor
available
is Models
belt ts related
to
well run-in. After
This
is
the fo])owing table.
Stitches
-------~--
per
5,200
minute
5,500
6,000
C.
Setting
This
machine is normally set up
Necessary
If
you
to Fig.
bottom
\Vith
our
bottom
on the
up
parts
and accessories for
have
purchased this machine
1.
which shows the
board
to
the table top
Brother
clutch motor. Models MD-344 and MD-354.
board, however. if you would use with
bottom
board.
Pulley
115mm
120
130
parts
necessary for
as
Outside
50
----·· -
II
II
as
semi-submerged type.
setting
as
up this machine
head only,
diameter
Hz
make
setting
semi-submerged type.
other
brand clutch motor, please
of pulley
and
length
of V -belt
60Hz
V-belt Pulley V-belt
39inch
II
39
39
"
_j__
--------------
-----
---
are
contained together with the machine head.
the table top
95mm 38inch
II
100
-----
as
110
per
------------
"
attached
table
II
38
38
"
sheet. also refer
up this machine and also the measurement to mount
there
is no
2571
18.
4 Centre
anxiety
of
V -belt
Centre
pullt•y
to set the machine
make
sure to
of
machine
have
proper
to
holes
the
the
275
Figures
are
m milimcter
-
3-
(Fig.
1)
'-!~
-1
Cushion base
D. Oiling, drai
Oil is
B
efon'
in F ig.
Oil
le,
Th
e o
some
to
the req
is
belo\\'
Be su
chine
dram1
·el s
il
time
re
.
out
operating
~)
and
hould .be
reservoir
befo
re the oil
uired
the
upp
to check
ning and
of the
the
pour
con~ists
lc,·el a lit
machine
machine. therefore.
oil
into
up
to
the
of
le\
·els
tle
er line o f the o
the
oil gau
maintenance
prior
to
n•mm
the mac
upper
t\\'O
after
ge
hine
line
of
lacks partitioned
of
both
tanks
the
oil is
il
gauge.
for o
il
level
.
its
~hipnwnl.
·e
the
using
the
the oil
gauge
by
match.
poured.
before
oil
filtn
cap
funnel.
sho\\'n in Fig. 1.
a filll'l'.
Check
i\dd
so
if oil is up
oil if oil le,·cl
operating
(shmm
it
lakes
the
ma-
(F1g. 2)
\\'hen
ope
rating
after
it
has
of
oil
into
the
add
oil
into
:
\t
the
end
of
nil. There
The
a f
quantity
sho\\'n in Fig.
The
machine
major mo,·
m
ounted
ing
about
\\'ire gauze.
the
been
out
of oil
oiling
points
them
if tlw m
100
hours
ter. changl'
of
oil
required
li
. for
draining
'
('lllploys a
part~.
t \\'icc a
etc.
Thi
s is desi
machine
for a long IK
sho\\'n
achine
actual
it
once
geared
It is
recommended
year
(F
ig.
for
the
in Fig.
is
operation.
in
about
is
about
oil.
pump
for
cleani
rabl
e for
4)
fir
st
time
after unpacking
'riod
of
time.
add
I.
and
;)_ You
operated
daily.
running-in
thr
ee
months
period.
HOO I.OOOcc. l<emm·e
for the forced
that the o
ng
of
long
life
its
inner
of
il
the machine.
it
:)
or 6 drops
do
not
ha,
·e
changl' the
use.
the
~cn'\\'
lubrication
rcscrYoir
to
he
surfaces. pump,
or
to
its
dis-
L
ower
(
F1g.
(Fig. 5)
line
3)
4
(Fig. 6 )
E.
Needle
\Vith machine
In
ord
jer
sey.
the
needle
1.
Operating
1) Pour
(50cc
2) If thi s
tim
felt on
th
e fell
3)
The co
oil.
te
ria
2.
Sewing
\\"hen you
er
to
and
cooler
get
tri
coo
model
the good
cot.
etc
ler
devic
device
··
- C". it is equi
sewing res
..
or
\\·i
e.
procedure
the silicone oil into the
in
ma
e. it
ck
namely
ls
appli
capacity
tak
the nee
so
\\"
chin e is
must
ould se\\" the s
) the n open the
brand
es
about 10·
dle gu
as to
be
15
ard. then
thorough!~
closed
on the s low speed ope
ed
and
also \\"h
capability
with
th
ne\\" or
minut
·
\\"
hen the machine do not re
en you do not u
ynthetic
materials at the high speed of 6.
3.
Silicone
Siljconc
5
0cc
silicon e o
se\\·ing
4.
Proper
oil
oil . .
il could be o
\\"Ork.
installation
to
..
\"iscos
be
used
it~·:
500cs
perat
on
the
pp
ed \\"ilh the needle cooler device.
ult
on the synthetic mate
the syntheti
tank
coc
aft
es
c threa
approxim
k sho
\\"11
er it has been out o f u
to saturate the sil
apply se\·eral
s
aturat
e before se\\·ing operation.
rati
on or c
needle
cooler
materials. jersey.
00
0 s
titches pe
ed appr
oxima
te ly half a mo
machine
ds. such ;ts
ate ly I
in
Fi.
~.
dri
ps
otton
thread. coll
se
the machine.
tricot. etc
r minute.
Ov
erloc
needle guard
:>
7.
icune o
of
silicone o
quir
e the silicone
nth
k stitch
rial
s and resin treat
f\y
lon
and Dacron
in capa
se
f
or
il into
on
..
it can
of
Sl'\\"
cit y
long
il
ma
th e
on
·
lll
g
ed materia ls such as pol
. it wi
ll
he a
clv
ant;tgeo
(Fig. 7)
be ensured
to
SC
\\"
up
lo 6 plies
operation although it depends
V1nyl tube
yeste
us to usc
of such
on
th e
r.
Overlock
stitch
needle
guard
Fig.
8 )
(
1)
T he lop of the felt must be a ligned \\"
In this case. please
2)
Position
Th
e p
111
Fig
3)
Removal
os
of
ition or
. 7.
of
tank
th
e tank
the
be caref
~houl
top
cover
Felt
Double
stitch need
uard
ul to set up so
d
be
set
cha
c
ha1
n
looper
needle gua
of the groo\·e
1n
le
ith the l
Double
st1tch
D
ouble cha1n
st 1tch
op
that the double chain stitch
up
at
the
po~ition
that the \ "l'nt h
rd
of
m·er loop
ole
loop
is h
(Fi
g.
er
need
er
may
igher than
9)
le guard
not c
the oil k \·el
ontact
Fe
.(Fig.
Hl
to the lube.
as
sho\\"n
lt
holder
(Fig. 10)
\\"hen you pull the tube Point A to the
the tank can be detachable t
ogether \\·ith top cm·cr.
lef
t as per Fig. 10. t
he tank and felt
5
portions \\"i
ll
be
separate
d.
thu
s
F.
Machine
The prop
operating
er
opera! ing direction of thi s machine is clock wise as vi
direction
ewe
d fr
om
the pulley side.
Install
G.
Tu
rn the pulley until the needle
to
its highe
® shown in Fig.
finger and m
dir
the
::.Jo
\\', lo
tlw needl
to\l'ard yo
lamp
c
in the
a
ll
the
sc
rews.
Threading
H.
Pa
ss
over
2.
Before pa ssing these thre
the n
in Fig. 1
CD
Und
® Over looper
® Double cha in stitch loo per
th re
0 Overl
threa
® Double c
thr
ing needles
st
position, l
ove
lhe presse
ection
hol
ne
the threa
eedles are a t
er
ad
ead
as
indicated with arr
osen the needle set sc rew s and holding
es
with their
u.
then insert
es
all the
edle
clamp
way up.
looper
3.
looper
ock
d
Aft
ds
thr
3.
doub le c
thre
thread
stitch needle
ha
in stitch needle
ower
11
, pr
ess
ing by the th
grooved
them
way
up checking the holes
whether th
er this check, tighten the
ough the eyes
hain stitch loo
ad
the highest position, and m
ad
bar
is raised
the lifter leve l
r fool
s, open
arm
ow marl
side facing
into
the nee
ese needles
of
the
umb
<13
lo
<.
dle
are
(Fig. 11)
the
cott
on stand
per
4. overlock stitch needle 5. doubl
fro nt
cover, cloth
ove
then please
plat
e and
the presse r foot arm
do
tn
the foll
thread
outward. Pass
Hole
Needle set screw
(Fig. 12)
owing order;
e chain stitch needle.
tak
e-up cover, turn t
the
threads
1.
he
Under
loop
er
pulley until
as
sho
wn
-
(Fig.
13A
]
thr
eads
r.
s and five thr
es, please
eads
Wh
en
you thread
cesso
ry box.
(Note)
Draw out
C
are shou
as shown in Figure 13A a
the thre
ld
be
taken
to the eyes
ad
approximate 5cm from the tip of loope
fo r threading of four
of thread
nd 138.
r
or fivo
guides, loopers. and needl
thread
- 6 -
becau
(Fig. 1
For
four
use with the twee
se
of
differ
ence between both ca
38)
threads
zer
111
the
ac·
ses
I .
Stitches
J)
12
])
I:!
E
13
:\
])
I:!
(Fig. 141
For
five
thread
s specification.
parallel stitching
co
mbinati
on 1s
of
adjusted (Figure I-I).
ment
parallel
El
:~J
\
combination(Figur
a lso be
me
nt
,,-ith
stitch
accompli
turnin
shed upon
g the adjustin g
screw
For
four
thread
s specification.
parallel stitching
co
mbination (Figure
upon
appropnat
J.
Thread
Thread ten
positions of
follow ing
1 .
Adjustment
i\ee
lower
on
T he
dle
thread
ed
the con
thr
ead
manner
and
of
c adjus
tension
sion may chan
the
thre
of
"·i
ll
be case
trarr
take-up
(Fig. 17)
Figure
ca
spec
tion.
and
ification.
J\
\\·i
Figur
ll
be
e B " ·ill
1>1~
and
El
arranged upon
but
rearrange-
ing
of
Dl 2
and
e 1
5)cou
ld
adjust-
1)12 an
d
E1
2A
16)
is
arranged
tment
.
ge
depe
ad
lake-
up and
thr
ead
take
-up
be
case
to
to
be l
oosened
in
the
middle
applied
to a thread
be
applied to a thre
In
3
th
e m·er lo
double chain
ha\'l' the s
br
and
chain s
ndin
g on
thr
ead
be t
ighte
if
the thread take-up
pos
ition
take-up for fi\-c
(Fig. 15)
case
of the
EU
ope
r n
sti
trongest
the
under
looper thr
then
the
m·er
titch
looper
the
trpe of
gu ides. If it should
ned if the
is
the sta
ad
thread take-up
ndard
take-up
1
DI 2
com
bination.
eed
le
thread
tch n
eed
le
thread
tension. follo\\·ecl
ead
tension
looper
and
doubl
thread
s tensio
thread
and
mat
change
is raised up
thread tens
thread
for
four thre;l(ls
ion.
s spe c if
and
n.
erial
is
i-
In ca
E 13A/
c
hain
the
st
e
ch
oo
l
sion.
thread tension
needle
~-c"·
consid
(Fig. 16)
se
of the E12A I DI2
DI2 combin
stitch
same
. ho\\·e,·cr.
itch
thr
anged.
per
thread has
follo"·ed br
thread
n.
stich \\·idth. s
erabl
r.
ation.
the doub
threads tension rema
the o,·erlock
ead's
In this case.
tension must
the unde
the str
ongest
the
over
and
then
tension.
tit
ch len
mak
e adj ustment in the
Thr
ead take-
loope
o,·er
gth
or
le
in
be
r
ten-
r
lock
the
up
2.
Adjusting
To tighten
guide .
is
To loose
the
stand a rd thre
double chain stitch needle
the
needle
thrl'ad.
n
ll
. lo
ad
reu
se
wer
the guide The gllldl• 1
tens
ion.(Fig 1
the
double
7)
thread
ch;un s
guid e:
titch
11
the
Ill'edle
middle
thread
position
- 7
F1g
F1g
\
. B
3.
Adjusting looper thread
As shmm
up
and
In this
J\s shmm
in Fig. 1,
thread
guide.
case. the pos
in Fig. 19.
ition of
up ;mel thre ad guide. f
take-up
(Fig.
18)
at
the
highest
for
the
thr
ee
und
er
looper thread
at
the highest positi
or
the t,,.o threads m·cr
and thread guide for overlock stitch
position
threads
of the needle.
m·erlock
guide
on
of
the needle.
lock
sti
tch.
sho\\"s in
stitch.
it
is
the
sta
ll
is for
it
is the standard pos
ndard
cotton
(F1g 19)
position
thrcctel
ition
of
the
and
of the
looper
/\ fo r
looper
thread
synthet
thread
ic thre
tak
ad.
take·
e-
4 . Adjusting looper thread
1\ s
shmm
s
tandard
1
hr
eacl
position
guides
in F ig.
.
~0.
of
the
at
double
take
the
-up and
highest
chain stitch
5. Adjusting thread tension screws :
After
completion
tension sc
I
ncorporate
Be ca r
s
ary
K.
of
The
presse
re\\"s
eful
or
ca u
Adjustment
feed
dogs
pressure
r foot adJUSting scrt'\\"
of thl'
for
an
appropriate adjustment
not
to
se
the th
on
abo,·e-mentioncd
fine
adjustment.
tum the sere,,· in or out c:-;ccssi,·ely.
read
take-up to keel
the
pressure
:
of
the
presser
foot
sho\\·n
of
can
111
thread
posit ion
adJustment
for
the
the threads
presser
be adJUS
Fig
~
guides for double chain stitch :
of
the
needle.
looper
thread
of the
abo,·e
"stitche
too
foot : Installing
ted
by
I
it
is
takl'·UP
thrt•ad
s"
(Page 71.
because
1t
e:-;n·ssl\·ely
means of
the
and
guides
may
or
removing
the
Double
stitch
thr
ead take
and
lighten
l.:imm
cha1n
looper
thn•ad
the threa
feed
Machine
The lowest
up
thread guide's ho
with
level
hr
ead take-
t
(F1g
20)
take-up.
ds
dogs · and
top
turn
more
Handl
point
of
the
le
is in
of looper
up
the
thread
than neces·
Height
er
F
11llo\\"
(
F1g. 22
the mstr
(}."jg
~2)
T o 1ns t
all
To mstall
uctwns gi\Tn
bl'im,· to 1ns
the cliffcrt'llllill feed dog ;\.
the
mam
feed clog C . li
8
ghten
tall
lighten
the sere\\'
(Fig 21 I
or
rcmm
the sere\\"
£
·e
the
keel
clogs·
13.
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