Singer 321C 131M-04 User manual

High
Speed
Overlock
Machine
73 7 M—04 243M—24 / TF
732M—075 244 M—24
733M—04 /TF 257 M—35
734M—04 257 M—55
24 7 M—24 / 25 257 H—56
® Singer is a registered trademark of The Singer Company Limited or its affiliated companies.
© 2009 Copyright The Singer Company Limited

1.1 Important Safety Instructions 1
1.2 Safe Operation 2
2.1 Product Description 3
2.2 Machine Specification 4
2.3 Motor, Motor Pulley and Belt 4
3.1 Table Cut-Out Diagram 5
3.2 Machine Installation 6
3.3 Lubrification and Oil Drainage 8
9
9
3.4 Needle Attachment (or Replacement)
3.5 MachineThreading
3.6 Thread Tension Adjustment 10
3.6.1 Tension Nut Adjustment 10
3.6.2 NeedleThread Control 10
3.6.3 LooperThread Control 11
3.6.4 Chain LooperThread Cam Control 11
3.7 Adjusting the Differential Feed Rate 12
3.8 Stitch Length Adjustment 12
3.9 Parts Relation andTiming 13
3.9.1 Needle and Needle Plate 13
3.9.2 Upper Looper (Spreader) and Needle 14
3.9.3 Lower Looper and Needle 14
3.9.4 Upper and Lower Loopers 15
3.9.5 Needle and Needle Guard 15
3.9.6 Chain Looper and Needle 15
—
4.1 Machine Head Cleaning 16
4.2 Oil Change and Filter Cleaning 16
4.3 Safety Inspection 16

6.1 Frame Components 20
6.2 Cloth Plate Components 22
6.3 Cover Components 24
6.4 Main Shaft Components 26
6.5 Needle Bar Components 28
6.6 Thread Guide Components 30
6.7 Upper Looper Components 32
6.8 Lower Looper Components 34
6.9 Front Looper Components 35
6.10 Cam Components 36
6.11 Differential Feed Components 38
6.12 Feed Dog Components 40
6.13 Trimming Components 42
6.14 Presser Foot Components 44
6.15 Lubrication Components 46
6.16 Feed Snap Components 48
6.17 Thread Spool Components 50
6.18 Plate Row Material Components 52
6.19 Accessories 53

1.1
Important Safety
Instructions
Important
When using the
machine, basic
safety procedures
must be followed.
Flead with attention
all instructions before
using the machine.
When using it,
understand that
all basic safety
instructions are
not limited to the
following items.
Read all instructions,
take care of this
manual, and use it
as reference when
necessary.
Safety Instructions
0 Before running the machine, make
sure all relevant safety specifica-
tions are adequate to specifica-
tions and technical standards in
your country.
0The machine should not be run
without its safety devices.
0 The machine should only be oper-
ated by properly trained personnel.
0 For your safety, goggles must be
used While running the machine.
0 Turn off or unplug the machine in
the following situations:
0 Passing the thread by the nee-
dle or replacing the bobbin or
looper.
0 Replacing the needle, presser
foot, throat plate, feed dog and
sliding plate.
0 When the machine is in main-
tenance.
0 When the operator is not run-
ning the machine.
Oln case of lubricant oil contact
with the eyes or skin, wash the
surface with plenty of icy water.
In case of ingestion, seek medical
help immediately.
ORepair, fitting or maintenance
should only be performed by
properly trained personnel.
0Maintenance and repair on elec-
tric equipment should only be
made by qualified personnel. If
any electric device is damaged,
the machine should be immedi-
ately stopped.
0 Before starting the machine in full
running, a test must be conducted
to assure that machine and opera-
tor are able to perform the task.
0 The machine should not be placed
next to a sound source as an ultra-
sonic welding machine and other
equipment.
0 The machine should only be run
with the proper electric cable
and connectors, and also the ad-
equate grounding.
. The machine should only be used
to sew materials as indicated in
its instructions manual, and indi-
cations of use should be followed.
Singer will not be held responsible
for any damage caused by unau-
thorized changes in the product.
High Speed Overlook Machine | Instructions Manual and Parts List 1

1.2
Safe Operation
A0 To avoid the risk of electric shock,
do not open the motor wiring box
and do not touch the components
assembled inside the wiring box.
0To avoid injuries do not run the
machine without the belt cover or
in case any other safety device is
removed.
0To avoid possible injuries keep
fingers, head, and clothes far
from wheel, belt and motor when
the machine is running. Nothing
should be placed near those parts.
0To avoid injuries never put your
0To avoid accidents in case of a
sudden start of the machine al-
ways turn it off when laying it
down, or remove the belt cover
and the belt.
Olf your machine is equipped with
a servomotor, it does not make
noises while being driven. To avoid
a possible accident caused by an
unexpected start, bev sure the ma-
chine is turned off.
0To avoid electric, do not run the
machine without proper ground-
Ing.
fingers next to the loopers when A'TO minimize the risk of accidents
the machine is running.
0The shuttle whirls at high speed
while the machine is running. To
avoid hand injuries, keep them
away from the shuttle while the
machine is running. Turn off the
machine to replace the bobbin.
0 To avoid possible injuries be care-
ful when putting down or lifting
the machine head.
or damages in electric compo-
nents caused by electric discharge
turn the machine off before un-
plugging it.
OCIean the machine periodically.
High Speed Overlook Machine | Instructions Manual and Parts List 2

2 1 High Speed Overlock Machine
I
Product
Description
High Speed Overlock Machine | Instructions Manual and Parts List 3

2.2
Machine
Specification
9"
o
.0"
o
.0"
o
N
I
0
Clutch
motor
1/2
HP
(400W)
high
2
3
Speed
(2
poles)
l
Motor,
Motor
'
Belt
type
M
Pulley
and
Belt
90
i
95
i
100
i
105
i
110
i
115
High Speed Overlock Machine | Instructions Manual and Parts List 4

3.1
Table Cut-Out
Diagram
65]—
214 V
259 J—
305 J—
442 L
540 V
4001—
—
433
A
300
A
269 258
Figure 1
289
359
469
537
595
1200
High Speed Overlock Machine | Instructions Manual and Parts List
(2)13
¢27

3 2 Install the machine support compo- the needle bed surface to the table
I
nents and the residues cam as indi- top is 100mm. For inserted assem-
_ cated on figure 2. In case ofsemi-in- bly the distance is about 5.0mm.
maChme serted assembly the distance from
Installation
Figure 2
High Speed Overlook Machine | Instructions Manual and Parts List 6

port base. the right side and the pedal of the
3 2 Set the machine head on the sup- Install the friction motor pedal at
I
presser
lifter
at
the
left
side.
- Connect the machine Wheel to the
maChlne motor With the belt. Be sure the motor is clockwise di-
Installation -
Adjust
the
belt
tension
so
that
there
rected,
referred
to
figure
3'
is a gap of about 20 mm when the
center of belt is pressured.
Set the belt cover according to fig-
ure 4.
Figure4
High Speed Overlook Machine | Instructions Manual and Parts List 7