Mitsubishi LT2-2230 Instruction Manual
MITSUBISHI
INDUSTRIAI.
MACHINE
LT2-2230
Double-Needle
Needle
Lockstitch,
Undertrimmer,
A
SEWING
Model
Classes
feed
Automatic
Variable
INSTRUCTION
Speed
MANUAL
PRECAUTIONS
(1)
Safety
1. Keep your
area
2.
Power
operator
Precautions
hands
around
the
mustbeturned
leaves
and
pulley
his/her
BEFORE
fingers
when
off
when
seat.
STARTING
away
from
turning
the
the
area
the
power
machine
TO
around
on.
is not in
OPERATE
the
needle
use,orwhen
3. Power must be turned off before tilting the machine head, installing or
removing
4. Avoid placing fingers, hair, bars etc.,
winder, or motor
5. Do
needle, or pulley
6. Ifa belt cover, finger guard,
the
(2)
Precautions
1. If
the
filling it.
2. If
the
lubricating.
3. When a
direction of
.(Thepulleyshould rotate counterclockwise
4. Verify
machine
(3)
Precautions
the
not
insert
machine
before
machine's
"V" belt, adjusting
when
the
fingers
without
when
Starting
oil
pan
into
the
these
has
the
machine, or replacing its parts.
near
the
pulley, "V" belt, bobbin
machine
the
machine
and/or
safety
Operation
is operating.
thread
is operating.
eye guard
devices.
take-up
cover,
are
an oil sump, never operate
machineis lubricatedbya drop oiler, never operate
new
sewing machine is first turned on, verify
the
pulley
with
the
power
on.
when
viewed from the pulley.)
the
voltage
nameplate.
for
and
Operating
(single or three)
Conditions
phase
with
under/around
installed, do not operate
the
machine before
the
machinebefore
the
those
given on
1. Avoidusing the machine at abnormally hightemperatures (35°C or higher)
or low
temperatures
2. Avoid using
the
(5°C or lower). Otherwise, machine failure may result.
machine in dusty conditions.
and
the
the
the
rotational
the
-CONTENTS-
PREPARATION
m
Power
[2
Connectionofcontrol
cable
FOR
OPERATION
connection
box
[Tl Adjustment of needlebar stop position 3
CAUTIONS
m Oiling (2) 4
r2l Oiling condition and adjustment on oiling to
m
ON
USE
Adjustmentofoilingtorotating
hook
thread
take-up lever 5
IT] Cautions on operation 5
OPERATION
Installationofneedles
Winding of
Selectionofthread
Threadingofneedle
bobbin
thread
threads
Adjustment of stitch length and stitch reversing (touch-back) 8
Settingofbobbin
Adjustment of needlethread guide 8
Threadingof bobbin threads 9
Tension adjustment of bobbin threads 9
Balance of
10
Needle
11
Adjustment of presser foot pressure 9
12
Timing between rotating hook motion and needle motion 10, 11
13
Adjustment of feed dog height 12
14
Relationship between rotating hook motion and take-up lever motion 13
15
Relationship between hook motion and opener motion 13
16
Relationship between needle motion and feed dog motion 14
17
Installationofmovable
thread
thread
tension
tension
knife
Adjustment of thread trimmer cam 16
Adjustment of thread tension regulator 17
Adjustmentof
meshing
pressureof movableknife and fixed knife 18
Sharpening of fixed knife 18
Adjustment for change of needle gage 19
Wiper
adjustment
1
2
5
6
6
7
7
8
9
9
15
20
ADJUSTMENT
m
"1-2
m Pedal
m Adjusting
AND
POSITION"
operation
the
pedaling forces
OPERATION
select
switch
OF
CONTROL
operations
UNIT
21,24
21,24
21,24
m Adjustingthe stitchingspeed 22,25
fSl Optional functions 23, 26, 27
CAUTION
28
PREPARATION
•
Overall
view
assembled
sewing
of
machine
FOR
OPERATION
X-type
LIMI-STOP
motor
•
Overall
assembled
sewing
view
of
machine
Touch
Touch
switch
Face
switch
back
plate
back
Phase
reversing
Z-type
LIMI-STOP
Control
Z-type
plug
motor
box
LIMI-STOP
Arm
motor
13
Receptacles
machine
for
cables
Operation box
Balance
^^vtype
Operation
Balance
box (option)
wheel
(included synchronizer)
V type belt
Power
push
button
X-type LIMI-STOPmotor
Receptacles
machine
Control
wheel
Power
box
push
for
cables
button
rn
Powercable connection
1.1
Connectors
The connector
receptacle
(plug)
after
Rubber
cushion
of cable to be connected to the control boxshould be set to the corresponding
checking
the
direction of
connection
— 1 —
to be
set.
1.2
Lamp
(1)
Whenawork
tube
the
connections
CAUTION
Awork
is
about
Be
suretoturn
(2)
When
shown
If
the
Leads
(standard
lamp
from
the
lamp
leads
properly
withaninsulation
lamp
voltage is 6V, but a voltage to
10OV.
off
(6\/, 15 to
leads
and
the
power
type)
found at
a work lamp is not used,
in figure at right
lamp
leads
are
hand.
shorted,
20W)isused,
connect
tape.
switch
the
remove
from
connection.
the
two
the
lamp. After
lamp
lamp leads
burn
the
sideface ofmotor. Then,strip
themtothe
ground
before
the
insulate
motor
windings
insulation
the
leads
out.
Insulating
(wind
Lamp
lead
12)
Insulating
tape
as
(wind2or3times)
Cut
tapes
2 or 3
times)
the
bare
wire.
CAUTION
Do
not
connect
e.g. foot
warmer.
motor
windings
1.3
Power
Source
(1)
Whenathree-phase
to
the
(2) For
(3)
1.4
black lead. Be
power
The
capacityoffuse
Rotating
fuse,
Direction
the
work
lampinparalleltoany
Otherwise
burn
out.
Connection
motor is used, connect
suretoconnect
consult
with
inside
heating
the
load capacity is
phase
the
green
by lecated electrician or our service agency.
box is 8A.
the
near
control
apparatus,
exceeded
Uto the red lead,
lead to
the
and
ground
the
phase
terminal.
Lamp
Vto
/
lead
the
About
or
more
white lead, and
10mm
phase
Therotating directionof motorcan bereversed byremovingthe rotation reversing plugon the side faceof motor,
turning it
stopped (approximately two minutes required). Also, be
[n
180°
and setting itagain. Fora sigle-phase motor, turn on the switch after the motor has completely
Connection of control box
The
control
box
shouldbeconnectedasshowntothe
Note:
(1) Be
suretoturn
off
for
safety
or
disconnecting
(2)
The
combinationofthe
heads
panels
special
combination
machine
panel.
before
with
the
are
specified
care
for
when
headormotor
the
the
motor
power
connecting
connectors.
machine
control
below.
the
correct
replacing
control
switch
Use
the
sure
to insert
the
plug securely to the fulldepth.
right. (Z-type LIMISTOP motor)
Round
holeintable-
Operation
box
W
Machine
1;
2:
3:
head
model
LT2-2230-L
LT2-2230-M
LT2-2230-B
means
using
100V.200V
220-240V,110~120V,110/220V
220/380V,340V,380V,400~440V
Control
LF-AMDF-*37
LF-AMDF-'30
voltage
box
model
Power
— 2 —
Speed
external
source
setting
Clutch
VR
Brake
Option
Synchronizer
"1-2
POSITION"
select
switch
Operation
box
Option
Sewing
machine
Presser
foot
2
The control box should be connectedasshown to the right.
(X-type
LIMI
STOP
motor)
Note: (1) Besuretoturn
off
for
or
disconnecting
(2)
The
combinationofthe
heads
with
panels
are
special
combination
machine
panel.
Machine
••
12:
24:
[3]
head
model
LT2-2230-L
LT2-2230-M
LT2-2230-B
means
usihg voltage
110V--120V
220V~240V
Adjustmentofneedle
tne
safety
before
the
the
specified
care
for
when
headormotor
Control
XC-AM-»*37
XC-AM-**30
power switch
connecting
connectors.
motor
below.
the
replacing
box
bar
stop
1. Adjust of "UP" position
When
the
machine
deviate larger
—1. Disconnect
pedal is kicked down by heel,
stopsat"UP"
the
machine
than
position. If
3 mm, adjust as follows.
the
plug (12 pins) ofcable from
head.
—2. Runthemachineandstop at"UP"position.
—3. Whileholdingthe
ting tool" in
tool.
2. Adjust of
When
stops
large
—1. Disconnect
—2. Run
—3.
"Down"
the
pedalis"Neutral"
at "DownSBposition. If
than
5 mm,
the
machine
the
position.
pully,
the
insertthe "adjus
hole®,then
position
the
adjustasfollows.
the
plug (12 pins) ofcable from
head.
machine and stop at "Down"
While holdingthe pully, insert the "adjusting
tool" in
the
hole
<B),
then
remove
3.
Confirm
thestopoepration, then setthe plug(12
pins)
coming
from
the
receptable.
machine
machine
control
Use
correct
the
control
model
position
the
remove
the
marks
the
head
Operation
box
the
marks
the
machine
deviate
tool.
into
the
Round
hole
in
table
a-f
Alt
UvlR
ENCOCCM
ttal
iPtlfi
Pully
Timming mark Arm
white
mark
"Up"
position
"Down"
BEFORE
position
Adjusting
tool
AFTER
Black
mark
— 3 —
CAUTIONS
rn
Oiling
Fill
level
found below "L" level replenish oilto "H" level.
For oil,
the
oil reservoir
should
use
ON
USE
(1)
with
be periodically
white
spindleoil specified by Mitsubishi.
oil up to
checked.
Oiling (2)
When a
new
sewing
time,
or sewing
considerably
suitable
amountofoiltothe
by
arrowinthe
machineisused
machine
long
timeisused
below
left
figures.
"H"
mark. Oil
If oil level is
for
out
again,
portions
the
of use
replenish
indicated
first
for
Oil
level
Don't
replenish
case
a
of
machine!
"B"
oil
hereinthe
type
sewing
Amount
of oil ... 5 ~ 6
drops
— 4 —
CAUTIONS
[Tl
Oiling
to
thread
ON
condition
take-up
USE
and
adjustmentonoiling
lever
(1)See dripping of oil during operation through
the
oil sight window to check oiling
conditioninthe
(2)Please use
respect
mechanism.
Increase
@
Cautionsonoperation
machine
the
oiling adjusting
to oiling to
Decrease
arm.
thread
Oil
Oiling
adjusting
screw
screw
take-up lever
sight
window
with
Adjustmentonoilingtorotating
Adjusting
Screw
ecrease
Increas
hook
(DWhen the power is turned on or off, keep
foot
away
from
the
pedal.
(2) It should be noted that the brake may not
work
when
the
power is interrupted or
power failure occurs during sewing machine
operation.
(3)Since dust in the control box might cause
malfunction or control troubles, be sure to
keep the control box cover close during
operation.
(4) Do not apply a multimeter to the control
circuit for checking, otherwise voltage of
multimeter might damage semiconductor
components
in
the
circuit.
-5
—
OPERATION
pn
Installationofneedles
Put
each
that
it is
socket
oppositely
needle
stoppedatthe
and
their
prime
set
screws.
until
needle
so
tioned
tighten
into
each
needle
turn
grooves
bottom
two
other.
socket
needles
are
Then
posi
Note:
Before
installing
of
Needles
fully
inserted.
the
needles,besuretoturn
are
not
Needles
wrong
are
set
direction.
off
the
power.
in
n
Windingofbobbin
Adjustment:
•
Tensionofwound
•
Conically
•
Lengthofwound
wound
O
Position
grooves
each
thread
thread
thread
other.
thread
n
the
prime
oppositely
Note: When bobbin thread is wound, keep the presser foot lifted.
Slack
windingisrecommended
Move
the
the
tighten
tension
thread
nut
thread
the
Loosen
and
Thread
adjusting
guide
toward
length
screwtodecrease
Thread
adjusting
guide
for
polyester
smaller
diameterofwound
screwtoincrease
lengthofthread.
thread
and
lengthofthread
nylon
thread
thread.
layer,
m
Thread
adjusting
winding
screw
quantity
Bobbin
should
filled
with
drically
wound
threadupto
of b-^bbin
be
cylin-
80%
capacity.
OPERATION
[3] Selection of thread
It is
recommendedtouse
the
left
needle
use
"Z"
For
bobbin
twist
each
needle
@.
When
pass
the
the
take-up
position,
showninthe
Pressing
showninthe
the
upper
(viewed
right
useofneedle
twist
thread
thin
thread
pass
the
upper
thread
twist
threadinthe
When
discriminate
possible,
needles.
wellas"Z"
[T]
Threadingofneedle
(1)
Pass
guide
Note:
threadorfilament
used,
(J)aswell.
(2)
With
most
the
order
Note:
button
saucerofthe
and
"S"
from
needle.
threadinboth
thread,
"S"
canbeused.
threads
thread
slippery
thread,
through
lever
locatedatthe
each
following
upper
figure
thread
can
twist
front),
threadsisim
twist
through
thread
for
example)
thread
needle
figure.
thread
below
tension
easily
pulled
thread
and
"Z"
the
thread
thread
(polyester
guide
upper
thread
loosening
opens
the
adjuster,
out.
in
as
S
twist
Z '
twist
® (1)
thread
thread
®(D
®
is
in
Needle
GDdD
(IT)(rJ)\(0)
Lead
the
thread
leftward,
Lead
thread
rightward.
thread
Ck
the
tension
releasing
kD
(kD
(0)(0)
^(Seedetailed
button
figure.)
Needle
thread
— 7 —
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