SINGER 143G2 Sewing Machine User Manual

SINGER
143G2,143G3
"AD #
Form K6485
(Form 2646w Rev.)
(663)
USE SINGER’ OILS INSTRUCTIONS
and LUBRICANTS FOR USING AND ADJUSTING
They insure freedom from lubricating trouble and give “
longer life to sewing equipment © ] М С Е R
The following are the correct lubricants for this machine: | S EW N G MAC H | N E S
TYPE B — MANUFACTURING MACHINE OIL, HEAVY GRADE
When an oil is desired which will produce a minimum of _
. » ” a "r
stain on fabrics, even after a long period of storage, use:
TYPE D — MANUFACTURING MACHINE OIL, HEAVY GRADE
OTHER SINGER* LUBRICANTS
TYPE E — THREAD LUBRICANT
For lubricating the needle thread of sewing machines for
stitching fabrics or leather where a thread lubricant is
required.
TYPE F — MOTOR OIL
For oil lubricated motors and plain bearings in power
tables and transmitters. ]
NOTE: All of the above oils are available in 1 quart, |
1 gallon and 5 gallon cans. = |
.. GEAR LUBRICANT
aw. | bE specially prepared grease is recommended for gear | 143 G 2 and 143 G3 ALSO
ro. icati turi ines.
N „er, | ubrication on manufacturing sewing machines | APDUES TO
_ ВАМ. BEARING LUBRICANT we
E This pure greose is specially designed for the lubrication MACHINES
“of ball bearings and ball thrust bearings of motors and ln
electric tronsmitters, ball bearing hangers of power tables, THE SINGER COMPANY
etc. Furnished in 1 Ib. and 4 Ib. fins.
*A Trademark of THE SINGER COMPANY Printed in Great Britain
Copyright under International Copyright Union
DESCRIPTION
HIGH SPEED MACHINE 143G2 has an aluminiumalloy vibrating
needle bar frame and a rotary hook, and is intended for over-
seaming and Zigzag stitching on fine lingerie, general fabrics
and light weight leather. It has ball bearings on the rear end
of the arm shaft and hook driving shaft. The needle has a maxi-
mum throw of 3/16 inch, vibrating both sides of a centre line.
The speed of this machine is especially valuable in zigzag
work and long overseaming in fine fabrics such as women's under-
wear, slips, also reducing corsets, dresses, etc. It is success-
fully used in general tailoring work and the manufacture of
articles such as trousers, coats, gloves, and for certain opera-
tions in the manufacture of shoes, such as attaching side and top
facings to the linings and butting canvas or felt toe pieces to
the end of the vamp.
In the manufacture of table covers, draperies, scarfs, etc.,
an ornamental effect can be produced by overseaming a cord with
thread of a contrasting colour. The raw edges of fabric may be
overseamed by taking one stitch in the fabric and the other over
the edge.
MACHINE 143G3 is similar to Machine 143G2 except that the
needle has a maximum throw of 5/16 inch. 1% is designed for
basting and tacking coat pads.
Speed
The maximum speed recommended for either machine 13 3000
stitches per minute, the speeds depending on the material being
sem. The machines should be run slower than the maximum speed
at first until the parts which are in moving contact have become
glazed by their action on each other. When the machine 13 in
operation, the machine pulley should turn over toward the oper-
ator.
4
To Oil the Machine
Use "ТУРЕ В" or "TYPE D" OIL, sold by Singer Sewing Machine
Company. For description of these olls, See inside front cover
of this book.
The machine should be oiled at the places designated by un-
lettered arrows in Figs. 2 to 6, and when in continuous use it
should be oiled at least twice a day.
Che Sine *Mapeiacion va Vo “. o an
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Fig. 2. Front View of Machine, Showing Olling Points
Slip the belt off the machine pulley, turn the machine back
on its hinges and apply oil to the points shown in Fig. 6, then
Dring the machine forward into place.
Fig. 3. Otling Points and Adjustments at Rear of Machine
D
Remove the face plate and apply oil to the places indicated
in Fig. 4, then replace the face plate.
Mo ys
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PO 72:89
Fig. 4. Face Plate Removed, Showing 911115 Points
Turn back the cap at the top of the machine, and apply oil to
the places shown in Fig. 5. |
Е2?278
Fig. 5. Olling Points and Adjustments at Тор of Machine
Fig. 6. Oiling Points and Adjustments Underneath the Machine
011 the bobbin case bearing in the hook race each time a
bobbin is replaced,
Needles
Needles for Machines 143G2 and 143G3 are Catalogue 1901
(135x7), made in sizes 7,8,9,10,12,14,16,18,20,22 and 24.
The size of the needle to be used should be determined by the
size of the thread which mst pass freely through the eye of the
needle. If rough or uneven thread is used, or if it passes with
difficulty through the eye of the needle, the successful use of
the machine will be interfered: with.
Orders for needles must specify the QUANTITY required, the
SIZE and also the Catalogue number.
The following is an example of an intelligible order:
"100 size 14, Catalogue 1901 Needles".
Best results will be obtained with needles sold by Singer
Sewing Machine Company.
Relative Sizes of Needles and Thread
Size Numbers For Cloth Work
of Needles Cotton Silk
le 70 to 100 00 to A
14 50 to 70 A, B
16 40 to 50 В, С
18 30 to 40 C, D
20 24 to 30 D, E
To make a smooth, even stitch with your sewing machine, use
good, firmly twisted and smoothly finished thread, that passes
freely through the eye of the needle,
7
In using slack twist or uneven silk,should it be frayed or
roughened, see whether the needle is too fine or too sharp, or
has a hooked point, made by striking the throat plate,
For ordinary work use the same size of thread on the bobbin
as in the needle. Always use soft finished thread on the bobbin.
Thread
Left twist thread should be used in the needle. Either right
or left twist thread can be used in the bobbin.
Fig. 7. How to Determine the Twist
Hold the thread as shown above. Turn the thread over toward
you between the thumb and the forefinger of the right hand; if
left twist, the strands will wind tighter; 11 right twist, the
Strands will unwind. Use soft finish thread of the same size for
the needle and the bobbin.
Fig. 8. Removing the Bobbin case
To Remove the Bobbin Case
Lift the bobbin case latch, as shown in Fig. 8, and draw the
bobbin case out from you, turn its open end down and release the
latch and the bobbin will drop out.
8
To Wind the Bobbin
(See Fig. 9)
Fasten the bobbin winder to the table with its driving pulley
in front of the machine belt so that the pulley will drop away
from the belt when sufficient thread has been wound upon the
bobbin,
Fig. 9. Winding the Bobbin
Place the bobbin on the bobbin winder spindle and push it on
as far as it will go.
Pass the thread down through the thread guide (1) in the ten-
efon bracket, around the back and between tne tension discs (2),
Then wind the end of the thread around the bobbin a few times,
push the bobbin winder pulley over against the machine belt and
start the machine.
When sufficient thread has been wound upon the bobbin, the
bobbin winder will stop automatically.
If the thread does not wind evenly on the bobbin, loosen the
screw (A) in the tension bracket and move the bracket to the
right or left as may be required, then tighten the screw.
The amount of thread wound on the bobbin is regulated by the
screw (B). To wind more thread on the bobbin, turn the screw (B)
inwardly. To wind less thread on the bobbin, turn the screw out-
wardly.
Bobbins can be wound while the machine is stitching.
4
+
m nn
9
To Thread the Bobbin Case
Hold the bobbin between the
thumb and forefinger of the
right hand, the thread drawing
on the top from the left toward
the right, as shown in Fig. 10.
With the left hand, hold the
bobbin case as snown in Fig. 10,
the tension spring being at the
front, and place the bobbin into
the bobbin case.
t рол
Fig. 11
Then pull the thread into
the slot in the edge of the
bobbin case as shown in Fig.
11, and back under the ten-
Sion spring into the slot at
the end of the tension spring,
as shown in Fig. 12,
ce
Fig. 12
10
To Replace the Bobbin Case
After threading, take the bobbin case by the latch, holding
it between the thumb and forefinger of the left hand: place the
bobbin case on the centre stud of the bobbin case base, release
the latch and press the bobbin case back until the latch catches
the groove near the end of the stud. Allow the thread to hang
free and replace the slide in the bed of the machine.
To Set the Needle
Push the needle up in the needle bar as far as it will go,
with the long groove to the front, and secure it firmly with the
set screw,
It may be necessary to turn the needle slightly to the right
or left for some threads if stitches are missed.
Operators are liable to use needles which are too fine,
Better results usually follow the use of a needle of a larger
size.
Threading the Needle
(See Fig. 13)
Turn the machine pulley until the thread take-up (10) is at
its highest position. |
Pass the thread from the unwinder, from back to front through
the lower hole (1) in the pin on top of the machine, from right
to left through the upper hole (2) in the pin, downward through
the hole (3), upward through the middle hole (4) and downward
through the hole (5) of the thread straightener, down and to the
left between the tension discs (6), and against the pressure of
the controller spring into the fork at (7), to the right of the
wire guard (8), up through the thread guide (9), from right to
left through the thread take-up eyelet (10), down again through
the gulde (9), against the auxiliary thread take-up and back of
the guide (11), into guide (12), down through the hole (13) at
the lower end of the needle bar, and from front to back through
the eye of the needle (14). Draw about two inches of thread
through the eye of the needle with which to commence sewing.
um
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11
Fig. 13. Threading the Needle
To Prepare for Sewing
With the left hand hold the end of the needle thread, leav-
ing 1t slack from the hand to the needle, tum the machine pul-
ley over toward you until the needie moves down and up again to
its highest point, thus catching the bobbin thread; draw up the
needle thread and the bobbin thread will come up with 1t through
the hole in the throat plate. Lay both threads back under the
presser foot.
To Commence Sewing
Place the material beneath the presser foot, lower the press-
ег foot and commence to sew, turing the machine pulley over to-
ward you. |
12
To Turn a Corner
Stop the machine while the needle ís rising, but before 1t 1s
out of the material, raise the presser foot and turn the work,
using the needle as a pivot.
To Remove the Work
Raise the presser lifter, tum the machine by the machine
pulley until the take-up lever 13 at its highest point and draw
the work from you. If the threads do not draw out easily, the
take-up Lever 18 not in the right position, as directed. If the |
machine is stopped as directed, the needle will not be unthreaded
in starting to sew, even 1f only a short end is left through the
needle.
For convenience in taking out the work, the tension of the
upper thread is released by raising the presser foot with the
lifter; but is not released by thick goods or seams passing under
the presser foot. Do not try to adjust the upper tension when
the presser lifter is up as the tension is then loose.
Causes of the machine not working properly will usually be
found in the tension not being correctly adjusted, or its discs
may be clogged with lint or knots of thread or the thread con-
troller spring may not have the correct tension (this is impor-
tant); the thread may be too coarse or too fine for the needle,
or the needle and thread too coarse or too fine for the throat
plate, or the needle bent or blunt. See that a straight needle
{is pushed up in the needle bar as far as it should go; any
particle of lint or dirt which prevents it from going up can be
removed through the cross hole in the needle bar.
To Regulate the Pressure on the Material
The pressure of the presser foot on the material should be
heavy enough so that the material is fed properly at all speeds.
The pressure on the material 18 regulated by the thumb screw
(F,Fig.4) at the top of the machine. Loosen the set screw (a,
Fig.4) at the back of the machine and turn the thumb screw down-
ward for more pressure or upward for less pressure, then tighten
the set screw (G,Fig.4).
13
Tensions
The needle and bobbin threads should be locked in the centre
of the thickness of the material, thus:
Y.
‘i
Fig. 14. Perfect Stitch
If the tension on the needle thread is too tight, or if that
on the bobbin thread is too loose, the needle thread will lie
straight along the upper surface of the material, thus:
an (ee fo
À ZA ZA ГИР ez
CA | CA | ZA | CZ
Fig. 15. Tight Needle Thread Tension
If the tension on the bobbin thread is too tight, or if that
on the needle thread is too loose, the bobbin thread will lie
Straight along the under side of the material thus:
Fig. 16, Loose Needle Thread Tension
To Regulate the Tensions
THE TENSION ON THE NEEDLE THREAD SHOULD ONLY BE REGULATED
WHEN THE PRESSER FOOT IS DOWN. Having lowered the presser foot,
turn the thumb nut (S,Fig.18) at the front of the tension discs
over to the right to increase the tension. To decrease the ten-
sion, turn this thumb nut over to the left.
The tension on the bobbin thread is regulated by the screw
(A,Fig.10) in the tension spring on the outside of the bobbin
case. To increase the tension, turn this screw over to the right.
To decrease the tension, turn this screw over to the left.
When the tension on the bobbin thread has been once properly
adjusted, it is seldom necessary to change it, as a correct
stitch can usually be obtained by varying the tension on the
needle thread,
14
To Regulate the Length of Stitch
Press the stitch regulator lever (A, Fig.17) and at the same
time tum the machine pulley over toward you until the lever (A)
Fig. 17. Stitch Regulator
engages the notch in the stitch regulator flange (B, Fig. 17).
Continue to hold the lever (A) in the notch in the flange (B)
and at the same time turn the machine pulley backward or for
ward, as required, until the number of the desired length of
stitch 1s opposite the arrow, as shown in Fig. 17, then release
the lever (A).
To Regulate the Width of Bight
The width of bight or zigzag stitch ts regulated by means of
the needle vibrator regulating spindle head (A,Fig.2) at the
front of the machine. To increase the width of Zigzag stitch,
turn the regulating spindle head over to the left. To decrease
the width of zigzag stitch, turn the regulating spindle head over
to the right. The extreme width of zigzag stitch is 3/16 inch
for Machine 143G2, and 5/16 inch for Machine 143G3.
15
INSTRUCTIONS
FOR
ADJUSTERS AND MECHANICS
Thread Controller
The function of the thread controller spring (Q,F1g.18) 1s to
hold back the slack of the needle thread until the eye of the
needle nearly reaches the goods in its descent, as without this
controlling action of the spring, the slack thread or silk (more
especially silk) will sometimes be penetrated by the point of the
needle as the needle is descending.
Fig. 18.
For more controller action on the thread, loosen the stop
screw (U,Fig.18) and set the stop (R) lower. For less action,
set the stop higher. The position of the controller spring (Q)
shown in Fig. 18 is the best average setting for stitching fine
fabrics and light leathers.
To strengthen the action of the controller spring on the
thread, loosen the tension stud screw (V,Fig.18), and turn the
tension stud (T) slightly to the left with a screwdriver. To
lighten the spring action, turn the stud to the right, then
tighten the tension stud screw (У).
16
To Set the Needle Bar
See that the needle is up in the bar as far as it will go.
There are two lines 3/32 inch apart across the needle bar
about two inches above the lower end. When the needle bar is at
its lowest position, the UPPER MARK should be just visible at the
lower end of the needle bar frame.
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Fig. 19. Face Plate Removed
In case the needle bar is not correctly set, loosen the
needle bar connecting stud set screw (H1,Fig.19) and move the
needle bar to the correct position, then tighten the set screw,
TO SET A NEEDLE BAR WHICH HAS NO MARK: Set the needle bar so
that when 1t rises 3/32 inch from its lowest position, the eye of
the needle will be about 1/16 inch below the point of the hook as
the hook point enters the thread loop.
To Set and Time the Needle Bar Frame
First turn the needle vibrator spindle head (A,Fig.2) all the
way to the right so that the needle will not vibrate when the ma-
chine is running. A straight needle should now come in the cen-
tre of the needle hole in the throat plate. If it does not,
Loosen the set screw which holds the eccentric stud (K1,Fig.19)
and turn the stud (K1) until it does, then tighten the set screw.
17
Now turn the needle vibrator regulating spindle head to the
left for the widest throw. Tum the machine pulley toward you
until the needle 13 at its lowest position. As the needle bar
starts to rise, the needle bar frame should start to move side-
wise. If it does not, advance or retard the vibrator gear pin-
fon (М, Fig.5).
To Remove the Needle Vibrator Gear Shaft
Remove the needle vibrator regulating spindle head (A,Fig.2)
and the eccentric bracket cover (C,Fig.2); remove the locking and
adjusting screws (Al and Bl,Fig.20), also the screw and spring
(E1). Loosen the two set screws in the gear (Dl) and remove the
needle vibrator gear shaft collar (L,Fig.3) at the back of the
arm, then draw the shaft out.
When replacing these parts be careful that the large washer
(C1,Fig.20) 1s in place between the gear and arm, that the posi-
tion screws are set firmly against the flat spots on the shaft
and that the set screws are at the right of the position screws
when the shaft has been returned to its place.
TO SET THE NEEDLE VIBRATOR REGULATING SPINDLE HEAD SO
HAT A WIDER THROW THAN THE ONE DESIRED CANNOT BE MADE:
E1478
Fig. 20. Transparent View Showing the Needle Vibrator
Regulating Spindle Head in Front of Machine
Turn the spindle head (A,Fig.2) to make the widest bight
possible; remove locking screw (Al,Fig.20) and turn in screw (B1)
until the stitch is of the width desired; then turn screw (Al)
down tightly on screw (Bl) as a check. The width of stitch may
then be decreased by turning the regulating spindle head, but
operators cannot make stitches wider than the adjusting screw
(Bl) is set to produce.
18
To Time the Sewing Hook
Remove the throat plate and with needle vibration at zero,
turn the machine pulley over toward you until the LOWER timing
mark on the needle bar is Just visible at the end of the needle
bar frame (or until the needle bar has risen 3/32 inch); if the
needle and hook are in correct time, the potnt of the hook will
be opposite the centre of the needle.
To time the hook, loosen the set screws in the lower belt
pulley (J,Fig.6) and turn the hook as required. Before tighten-
ing the set screws, see that there is no end play in the shaft.
Fig. 21
To Set the Hook To or From the Needle
The point of the hook should come as close as possible to the
needle without touching it. Loosen the four screws (X and AA,
Fig.21) and slide the hook to the correct position, then tighten
the two screws (X). Reset the gear on the hook shaft and tighten
screws (AA). |
To Remove the Hook
Remove the bobbin case stop (Y,Fig.21), loosen the hook
spindle screw (W) a few turns and tap it lightly to loosen the
hook, Then remove the screw (W) and withdraw the hook from its
socket.
19
To Remove the Belt from Within the Arm
Slide the arm shaft connection belt off the hook driving -
shaft belt pulley (J, Fig.6). and remove the machine pulley. loosen
the arm shaft ball bearing bushing (back) set screw (D, Fig.3) at
the back of the arm, and remove the bushing; lift the belt up
through the arm cap hole as far as possible and draw it out
through the space formerly occupied by the bushing.
When replacing the belt see that the sewing hook and needle
are in correct time before running the belt on the lower pulley
and verify the correctness of the timing before commencing to
sew.
Fig. 22, Putting Belt on Lower Pulley with
Belt Replacer 244005
To facilitate the replacing of the belt on the lower pulley,
use belt replacer 244005 (A, Fig.22). Rest the replacer in the
loop of the belt and slide it over the hub of the pulley, as
shown in Fig.22, having the notches in the replacer engage the
two set screws in the hub of the pulley. Turn the machine pul-
ley toward you until the belt 1s fully over the pulley, then re-
move the replacer.
| NOTE: As belt replacer 244005 will serve for several machines,
it is not regularly furnished with the machine, and must be
ordered separately.
20
To Remove the Arm Shaft The Sane |
TT
Remove the arm shaft connection belt and the machine pulley
Loosen the set screws and remove the position screws in the upper
belt pulley and the feed lifting eccentric (N,Fig.5). Remove the
top and bottom studs (Fl and Li,Fig.19) and the eccentric stud
(KL) in the needle bar frame after loosening the set screws which
hold them, and remove the needle bar frame. Remove the two gibs
(Gl and J1,Fig.19) which hold the needle bar connecting link in
the guide block. Loosen the set screw (at H,Fig.3) which holds
the take-up lever stud. Also remove the position screw and loos-
en the set screw in the perimeter of the needle bar crank,through | |
the hole in the casting (B,Fig.2), and remove the take-up and machines...
crank. Loosen the set screw (E,Fig.3) which holds the front
bushing and withdraw the arm shaft, with the front bushing, from
the needle bar end. If the bushing should stick, insert a brass BUY PARTS AND
rod through the arm cap hole and drive the bushing out. ,
NEEDLES MADE BY SINGER
Feed Mechanism
that are the same
as parts in new
To take up lost motion of the feed driving and lifting con- TO BE DOUBLY SURE...
nections, adjust their pinch screws (0,Fig.5). of new machine performance, make sure that all
replacement parts and needles are precisely
To prevent the feed dog from striking either end of the slots identical to those in new SINGER machines
in the throat plate, loosen screw (K,Fig.6) and move the feed dog
forward or backward until the longest stitch can be taken without
the feed dog striking the throat plate, then tighten the screw | Look for the trademark
(K). .
To Raise or Lower the Feed Dog . SINGER or SIMANCO
Usually when at its highest position, the feed dog should |
show a full tooth above the throat plate. | о оп every package or container
Remove the throat plate; clean the lint and dirt from be- 8 on the needle or numbered part
tween the feed points and replace the throat plate; tip the ma-
chine back and turn the machine pulley toward you until the feed
dog 1s at its highest position; loosen screw (7, Fig. 21) and
Needles in containers marked “For Singer Machines” are NOT made by SINGER,
ralse or lower the feed dog as required, then tignten the screw | TO ALL WHOM IT MAY CONCERN:
2). |
(2) : The improper placing or renewal of the Trademark “SINGER or
Loosen the two screws (CC,Fig.21) and turn the eccentric stud any other of the Trademarks of The Singer Company (all of which are
(BB, Fig .21) to level the feed dog, then tighten the screws (CC) . duly Registered Trademarks) on any machine that has been repaired, re -
built, reconditioned, or altered in any way whatsoever outside a SINGER
factory or an authorized SINGER agency is forbidden.