Brother Industries BROTHER LK3-B220 User manual

INSTRUCTION MANUAL
FOR
BROTHER LK3-B220, 221
High Speed Bar Tack Machine
BROTHER INDUSTRIES, LTD.
NAGOYA, JAPAN.
From the library of: Superior Sewing Machine & Supply LLC

CONTENTS
1. FEATURES .. .. .. .. ..................... ... ............................... ... . ... .. ....................................................
2. SPECIFICATIONS ............ .. ...... ... .......................................................................................... ~
3. OPERATION ............................................ ... ............................... .... ........................................ 3
1. Name of major component ...................................................................... .. . .. ............... .. ... 3
2. Selling up ............. .. .... .. ....... .. ........... .. .... .. ............... .. ........ .. ........... .. .. .. ...... .. ... .. ... .. ... .. . .. ... 11
3. Oiling............... .. ....................................................... .. ............... .. .. .. .................................. 7
4. Safety operation ............................................................................ .. ....................... .. ......... 7
5. Needle and thread ............................................................................................................. 8
6. Winding bobbin ............ .. ....... .. ........................................................ .. ... .. ............. .. ........... 9
7. Threading bobbin ca se ....................................................................................................... 9
8. Upper threading ................................................................................................................. 10
9. Thread tension............................................................................................. .. .................... 11
10. Adjusting tack width ·········· · ····· ·· ················· · ···· · ···· ~ ··· ..:.: ························ ·· ···· ·· ····· · ·············· 12
11. Adjusting tack length ........................................................................................................ 12
12. Adjusting pressure of work clamp ..................................................................................... 12
13. Cleaning shuttle ................................................................................................................. 12
14
. Removing needle plate....................................................................................................... 12
15. Installing needle plate........................................................................................................ 12
16 . Replacing needle hole plate ............................................................................................... 1:3
4. ADJUSTMENT ........................................ .. ............................................................................ 13
11. Adjusting needle bar .. ........................................................................................................ 13
2. Adjusting feed mechanism ................................. .. ............................... .... .... .. ..................... 14
3. Adjusting thr e ad trimming mechanism....................................... .. ...................................... 16
4. Adjusting thr e ad nipper ............................ .... .... .. ............. .. .. ........ .. ....... .. ........................... IS
5. Adjusting clutch and brak e...... .. ........................................................................................ 19
6. Adjusting wor k clamp lifter ................................................... .. . .. .... .......... .. ...................... 21
7. Adjusting work clamp on B221·1 and -2 ............................................................................ 22
8. Needle cooler mechanism (O pti on) ........ .. ...... .. .... .. ............ .. ............................................... 23
5. PARTS LIST for LKJ-8220 ............................................................................................... 24
From the library of: Superior Sewing Machine & Supply LLC

LK3-B220, 8221 High Speed Bar Tacking Machine
The ~e ma c h i n e ~ are h ig h ~ p ee d bar lacking mac hi nes c ap able to sew at m a~ imum hi ~ ! h ~ p eed of 2. 000 ~! it c he s
per minut e. The model Ll\ :~ ll 22 0 b ~ u itable to do tacking jobs on overco ats . gent's pants. jeans. m · e ra l l ~ and
knilled und en \ e a r ~ . and the model LI\::.J-: 22 1 i~ suitable to do tac k in g jo b ~ on eyelet buttonhole e nd s, belt
loops on ,l.(e nl \ <llld la d ie s pa n t ~. and jean: and Iabeii in .!.( on \ arious clothe s.
FEATURES
1. This is designed with cylindrical bed, link motion thr e ad tak e- up. and shuttle hook.
2. On thread trimming mechanism, BROTHER' s own unique idea is adopted to be ensured perfect thread
trimming perf ormances and thread tails ar e unified with this thread trimming mechanism. Also, the
replacement of the thread trimming knives are very easy.
3. All the mechanisms are designed to be durable even at max imum high speed of 2,000 stitches per minute,
thus it is ensured the less noise and less vibration. Especially, the clutch mechanism is designed with speed
reduction method with two belts, and it ensures smooth operation when the machine starts and stops. Thi s
feature brings the noiseless ope ration and prevent the thr ead-off out of the needle.
Also, on the needle
bar mechanism, it adopted with needle bar clamp to ensun• noiseless operaticni and
perfect stitch formations.
4.
All the mechanisms are covered entirely and it is so-called totally enclosed type, thus it prevents thread
jamming and oi l stain.
5. It ensures wide
space underne ath the work clamp with unique de signed work cla mp lifting me ch anism.
6. One of the greatest advantage is BROTHER's
own designed hook timing adjusting mechanism,
which is eliminated to adjust the space between
needle and hook point with wa sher dependent on
the thickness of needle. This adjustment is made
only by adjusting ring
to get proper cle aranc e.
7.
The belts are vertically put, th en it enables easy
setting and dismantling and it can be used with
endless belts.
8. Bed base plays role of oil reservoir, thus it en·
sures no oil-leakage.
- 1 -
From the library of: Superior Sewing Machine & Supply LLC

-
SPECI Fl CATIONS
MODEL LK3-B220 LK3-B220 LK3-B220 I LK3-B220 LK3-B220 LK3-B220 LK3-B220 LK3-B220 LK3-B220
Sub-class I -1
-2 -3 --l
-5
-6 -7
-8 -9
Overcoats.
gent's and Knitted gen t' s
Knitted
Denim or
Denim or
Overcoats, Overcoats,
Application Overalls, ladies' Underwears ladi es
Unde rwears
Corduroy
Co rduroy
Overalls, Overalls,
Jeans, etc.
pants pan ts
Jeans
Jeans
Jeans, etc. Jeans, etc.
;\ o. of stitch
I
42
28 28
21
21
42
28
42
28
Tack length
I 6-
16 111m
:3.5 - 10111m 3.5- 8111111
3- 7111111
3- 7mm
7.5- 20 mm
6- 16111111
7.5-20 mm 6-16111m
I
Tack \\'idth I 1-
3ml11
I 1-
3mm 1- 3111111
I 1-
3mm 1 - 3mm
1- 3mm
l - 3mm
1- 3mm 1-3ml11
:\Iax i mu111 sewing speed I 2
.0 00 spm 2,000
spm
2,000 spm
2,000 spm
I
2,0 00 spm
1,900 spm 1,900 spm
2,000 spm 2,000spm
:1\ ee dle bar str oke I
-!1.2 mm
41.2 mm
41.2111111 -!1.2 mm 41.2 mm
4L 2mm 4L2mm
41.2 mm 41.2 mm
Height of \\'o rk clamp
II
lOmm
10mm 10mm
10mm lO mm
lO mm 10mm
lOmm 10mm
;\e edle movem ent I N
MODEL LK3-B221 I LK3-B
22 1 LK3-B221 LK3-
B221 LK3-B221 LK3-B
22 1 LK
3- B 22 1 LK3-B221
Sub-class I
-1
I -2
-3
--l
-5 -6
-7
-8
Application
IEyelet button-! Eyel et button-
Belt loop Labelling Labelling Labelling Labelli
ng
Belt loop
hole end hole end I
;\o. of stitch
28
I
21
21
-!2
32
28
21
28
Tack length
3- 7mm
I 3-
7mm
5- 12 mm 20 - 50mm
14 - 35mm
18 - 45 mm 16 - 40111111 7.5-20mm
Ta ck wi dth
1- 3mm
I 1- 3
mm
0- 1.5111111 Omm
Omm
Omm Omm
0- 1. 5mm
1\I axim um sewing sp eed II
2. 000 spm
2 .0 00 spm
2,00 0spm 2. 000spl11
2, 000 sp m
2, 000sp m 2
,000 sp111
2,000spm
l\ eed bar s tr oke
I
41. 2 ml11
I
-!1.2 mm
41.2 mm
41.2 111111
4L2mm
4L2mm 4 1.2111111 41.2111111
Height of wo rk clamp
lOmm
I
lOmm
lOmm
10111111
lOmm lOmm
10m111
lOmm
~ ee dle movement I
From the library of: Superior Sewing Machine & Supply LLC

OPERATION
1. Name of major components
(A) Model LK3-B220
Thread take-up
Sub tension
assembly
Arm cover
Belt cover
lever----ffff1~~====~~==~~==~~==~.(
Cam cover
Face plate
Nipper
operating--
lever
111ain tension
ISSembly
Presser arm
Needle bar ITack
width
regulator
Emergency stop Bed base
motion lever
(B) Model LK3-B221-1 & -2
(D) Model LK3-B221-4 - -7
F UDTHER3
Bed
Work clamp lifter
(C) Model LK3-B221-3 & -8
-3-
From the library of: Superior Sewing Machine & Supply LLC

2. Setting up the machine
*Location and measurement of table top
for LK3-B220 & LK3-B221
*Location and measurement of table top
for LK3-B221-3 & -8
A Holo for
ng ht troodle
U H ofo for
lo ft troodle
C Ho lo lor motor
mounung bolt
D Ha lo for machine
bod boso bo lt
t: Holo for
ho nd rest
----------1200----------..j
*Putting the chains l
Work clamp
lifter l
Adjust length
o left
J' oh•;"
Trea ~ Je_ ' .§ Clutch actuatmg
, lever Clutch actuating
r-.~'""'- "' .__,. · · rod
Left treadle
Adjust length
of chain
Right treadle
(Clutch actuatin g rod is included in accessories.)
*Putting belts
Belt for h1gh
speed o pe r at 1o n
(l on ge r belt)
- ·l -
wmder
From the library of: Superior Sewing Machine & Supply LLC

*Length of belts
In ·asc that you may usc \\' ith non- BROTHER mad e table and stand, the standard length of the belts ar c
as follow s:
-c
Longer belt
50 liz
Short er be lt
1,119mm
1,007 llllll
-c
Longer belt
60H z Sho
rter belt
1,080 mm
992mm
In case that you ma y use with non- BROTHER made table and ·stand, please determine the length of belt s
temporarily sett ing between mo tor pull ey and idle pulley, on condition that the belt is not stretched , and
cut the belts being 30 - 40 mm s hort er and put the both ends together as descr ibed hereunder.
(NOTE) Be careful to get prop er tension of the belts. In ca se of loose tension , it cannot run at prop er
speed
and tight tension, it caus es too heavy torqu e.
*MOTOR
Single phase 250W
Three phase 250W
*Joining belts
~~§:
/Heated~
Belt Belt
4 pole
4 pole
*MOTOR PULLEY
2,000 spm
50 Hz 130mm
60Hz llOmm
Sharp knife
~
t=-=-I; - - 6--
Remove
1,900 spm 1,700 s
pm
1,500 spm 1,300 spm
120 trim
108mm
96mm 84mm
102mm
92mm
82mm 72mm
Base for belt joining
The belts contained with this machin e head are made of polyule thane rubb er of Smm¢, which do es not
cause any slippage on machine's running, and with the he at adhesion it ensur es durability without any
anxiety of breakage on the joining points during the operation:
Please take the following steps to adhere the belts.
(1) Cut the belts 30- 40 mm shorter than the length that it se ts te mpor arily be tw een the pull ey s of motor
and machine head .
(2) Melt the both ends of the belts w ith heat such as li g ht er flame, h ea ted iron plat e and th e li ke.
(3) Put together both ends on ba se for belt joining th en pr essing each end and le av e it about 3 minut es
without remov ing the contact using base for belt joining contained in access or ies.
(4) Remove the surplu s with s harp knif e as per illustration .
- 5 -
From the library of: Superior Sewing Machine & Supply LLC

*Setting spool stand
*Checking speed reduction
Photo 1
Photo 2
Photo 3
o Without running th e motor, wh en clutch is ra ised, the
belt guide is pos it ioned at slow speed pulley and idle
pulley as per Photo
1.
o With turn ing th e pulle y, when clutch tr ipp ing cam lever
is disengaged out of s
top ca m, the belt g uide lever is
positioned
at slow speed pulley and idlt> pulley as per
Photo 2.
o At a few sti tch es bef or e th e machine stops, when clutch
tr ipping cam lever is at th e stop cam, th e belt guide
le ver is positioned at slow speed pulley a nd idle pulley
as per Photo 1.
o At the stop position, the belt guide lever is positioned
at idle pu ll ey and bobbin winder pulley as per Photo 3.
6
From the library of: Superior Sewing Machine & Supply LLC

3. Oiling
Supply one or two drops of quality sewing machine oil inlo oil holes with arrow indicated before using
the machin e.
10 drops
1
10drops
(L- !14 I
5 drop s
I
'
I
' I
4. Safety operation
Ri ght treadle
Left treadl e
- 7 -
o When the switch is "ON", motor
s tarts to run and the id l pu ll ey
s tart s to run.
l Release the right tr a dl e when
the
ma chine is in op era tion.
(Machine
st ops automatically)
r; When the left trea dl e is d e-
pressed, it works the th rea d
trimming and thread nipper
mechanisms
an d li fts work clamp.
From the library of: Superior Sewing Machine & Supply LLC

oEven it the left treadle is accidentally
depressed while the machine
is in opera·
tion. \\'ork clamp stays clown .
5. Needle and thread
*Selection of needle and thread
Needle size
Thread size Application
# 9 #
100 - #80
Tricot, fine knitted under
wear
#11 #
80- #60
II II
# 14
# 60- #50
Men's and Ladies' wears
# 16
#
50- #40 Work clothes. overalls, overcoats
# 18
# 40 - #30
II II II
# 19
# 30 - #20
II II II
#21 #
:W - # 8 Thick overcoats, Jean s
*Installing the needle
Loosen this s crew .,...;w~......:~
II
Insert needle all the way
up into need4e hole in the
needle bar, with its long _ ___,.,,,
groove facing toward you
and fasten needle tightiY--t J--->...\., ,....... . -J
with the screw.
To stop the machine during the opera-
tion. depress the emergency stop lever
before completing sewing cycle.
position)
o When the work clamp is raised up, the
machine will not
start even if the right
treadle
is accidentally depressed.
Left-twisted thread
~
The twist is strengthened
in case of left-wisted thread.
• Use a left-twisted thr ead for
upper thread.
From the library of: Superior Sewing Machine & Supply LLC