Singer 211U157 User manual

Service
Manual
SINGER*
INDUSTRIAL PRODUCTS
* A Trademark of THE SINGER COMPANY
Copyright©1981 THE SINGER COMPANY
All Rights Reserved Throughout the World
U141

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DESCRIPTION
INSTALLATION
LUBRICATION
CONTENTS
OPERATOR
INFORMATION
ADJUSTMENTS
Arm
Shaft
Connection
Belt Replacement
Bobbin
Case
Opener, AdJusting 17
15
INDEX
Installation
1
3
3-5
6-7
. 8 -
17
3
Bobbin
Case
Opener,
Timing.
Lubrication
.
3-
4
15
Needles.
Bobbin
Case,
Removal
From
Sewing
Hook
Bobbin
Removal .
Bobbin
Replacement
Bobbin
Thread Tension
Bobbin
Winding
Description
of
Machines.
Feed Dog
Adjustment
Feed
Eccentric
Adjustment
Feed Reversing Mechanism .
14
7
7
8
7
1-2
16
16
9
5
Needle Bar Height
11
Needle Bar Position Relative
to
Presser Bar
11
Needle Bar Rock Frame Removal
17
Needle Setting
5
Need
le
Thread Tension
8
Pressure
on
Material
9
Speed
5
Stitch
Length Regulation 9
Feed Reversing Mechanism
Adjustment
Hook
Height .
11
Take-up Lever Removal
.
17
Thread
Controller
.
Hook
Lubrication
.
Hook
Position Relative
to
Needle
Hook
Removal
Hook
Timing
.
12
4-5
13
14
13
Thread Tensions
Threading
Bobbin
Case
Threading
(Lower)
Threading
(Upper)
DESCRIPTION OF
MACHINES
High speed
two
needles, long
arm,
lock
stitch,
compound
feed, vertical axis
hook,
flat
becJ
machine,
for
corsets, overalls and
clothing
generally.
GENERAL
FEATURES
The
compound
feeding mechanism
which
consists
of
a
needle feed and
drop
feed, prevents
slipping
of
the
upper
and
lower
plies
of
material
when
being
stitched,
and assists
in
two
or
more plies being fed evenly
to
the
end
of
seam.
Vertical
axis
hook
with
metered
lubrication.
Hooks
can
be removed
without
disturbing
the
hook
shafts.
Adjustable
feed
driving
eccentric
located on
hook
driv-
ing shaft, produces a
uniform
stitch
length at all speeds.
Feed reversing mechanism,
controlled
by
hand
or
foot.
Arm
shaft,
hook
shaft, and
belt
driven
bed shaft are
mounted
in ball bearings at rear and in
automatically
lubri-
cated
plain
bearings at
front.
Plunger
for
changing length
of
stitch
is
on
top
surface
of
bed.
Sleeve
type
take-up.
Belt
drive.
Knee
lifter.
Federal
stitch
type
301.
8
8
7
7
6

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SPECIFICATIONS
Need
le
bar stroke
Take-up stroke .
Clearance under presser
foot
Maximum
stitch
length
Maximum
speed
..
Bed
length
..
Bed
width
...
Space
at right
of
needle
Need
le
..
Oil
...
1-5/16"
(33.34
mm)
. .
2.079"
(52.8
mm)
..
1
/4"
(6.35 mm)
..
6
SPI
(4.2 mm)
...
4,000
SPM
.
20-3/8"
(517.5
mm)
.
7"
(
177.8 mm)
.
9-5/8"
(244 5 mm)
. Cat. No. 1901
...
Type
"A''
or
"C"

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INSTALLATION
casten dric' can
to
tabie
with
its
right
edae in ',ne
with
r~
act-,ne
belt
slot
in tab1e Fasten knee
liher
brac"et
in
i
ocation
shown
in F
;g
1 Assemble
it
so
that
i
ifte
roo does
I,ot
strike
d<o
pan Screw slots in
bracket
orm-<:iE ,,ecessary
aoJ"str,em
Set
stoo-stud
to
stop
the
actior
of
knee
lifter
as
soor
as
oresser
foot
is
raised enough
tO
trio
har,o ,ever
LUBRICATION
For
the
lubrication
of
the machine, onl1
1
SINGER
OIL
'TYPE
A
or
C",
suppiied
by
THE
SINGER
COMPANY,
should be used, In
order
to
insure
proper
function
of
the
P'ic,chine and
to
prevent
any
excess wear
of
the
rnoving
parts and bearings,
the
r:1achine should be oiled regularly,
In
case
of
continuous
use,
it
shou
Id
be oiled even
more
o"ten
if
it
is
used
to
prodxe
long seams arid run
steadily.
Fill
r-1achine arr,, reservoir
to
high
mark
on oi! sight
gac1ge
as
indicated
in Fig
2,
The
machine
arm
reservoir
contains
an
oi;
vibrating
pump
which
releases
oil
only
when
the
machine
is
operat-
ing
Fig, 3 shows
the
oil
filler
hole
for
hook
saddle reservoirs.
Remove
oil
gauges
as
shown
in Fig. 3 and
fill
hook
saddle reservoirs
to
full
mark
on gauges.
To
lubricate
the
hook
gears and opener gears, a generous
supply
of
oil
should
be
applied
AT
LEAST
TWICE
DAILY
to
the
two
oil
holes.
4,6"(117mm)
EDGE
OF
CHECK TWICE
DAILY
OIL
GAUGE
(CHECK
TWICE
DAILY)
•-
--.MACHINE
CUT-OUT
Fig.
1
LIFTER
ROD
BEFORE
STARTING
MACHINE
FILL
TO
HIGH
MARK
I
Fig.
2
II
OIL
HOLE
(
FILL
RESERVOIR)
TO
HIGH
MARK
Fig.
3
HIGH

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Fig. 4
Fig. 5
~-
' '
~ '
~®·.u·
', i
,I /
r
''
"'''
CONTROL VALVE
SET SCREW
Fig. 4 shovvs the areas of the bed surface to where oil
should be applied.
Fig. 5 shows
the areas of bottom of the bed to where oi I
should be applied.
HOOK LUBRICATION
The bobbin case raceway is lubricated by 011 pumped
from the hook saddle reservoir while the machine is operat-
ing. The
amount of oil received by hook receway is very
important. To check this, first remove bobbin case. Then
with the machine running, hold a small piece of white paper
near the
hook for about 10 seconds. A distinct spray of oil
should be visible on the paper.
If there is no trace of oil or an excess of oil on the paper,
proceed
with the following steps.
1. Tip machine and loosen control valve set screw shewn
- 4 -

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2.
Turn
control
valve screw shown in Fig. 7 clockwise
for
more oil;
counterclockwise
for
less
oil. Re-tighten
control
valve
set
screw.
A short test run
of
at least a
m1I1ute
snould be made
between adjustments
to
insure
uniform
oil
flow.
After
each
adjustment
of
oil
control
valve screw,
oil
control
valve
set
screw should be securely tightened.
SPEED
Maximum
speed
for
machine 212U141
;s
4000
stitches
per
minute.
NEEDLES
For
machine
212U141,
use
Singer Needles, Catalog
1901.
Size
of
needle
for
a
particular
operation
is
determined
by
size
of
thread and
type
of
material
to
be sewn.
Orders
for
needles should state
quantity
required, size
number
and catalog number.
For example:
100
Needles, Size
14,
Catalog 1901
SETTING
THE
NEEDLES
Turn
the
machine
pulley
over
toward
you
until
the
needle bar moves up
to
its highest
point.
Loosen
the
set
screws in
the
needle
holder
and
put
the needles up
into
the
holder
as
far
as
they
will
go,
the
inside needle
or
the one nearest
the
upright
part
of
the
arm having its long
groove
toward
the
left,
and
the
outside
need
le
or
the one
farthest
from
the
upright
part
of
the
arm having its long
groove
toward
the
right,
the
eyes
of
both
needles being
directly
in line
with
the
arm
of
the
machine,
then
tighten
the
set screws.
TO
HIGHEST
POINT
5
CONTROL
VALVE
SCREW
Fig. 7
FACE
WITH
EACH
OTHER
Fig. 8

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HOLD
THIS
END
I
ROLL
OVER
, '
TOWARD,:~1/
--~,
/
/ /
·~--/~
--.
THREAD
It
is
recommended
that
left
twist
thread
be
used
:n
both
needles.
Either
left
or
right
twist
thread can be used in
bobbin.
To
determine
thread
twist,
hold
thread
as
shown in Fig.
9.
With
left
hand
holding
one end
of
thread,
twirl
other
end
with
thumb
and
forefinger
of
right
hand over
toward
you.
If
left
twist
thread, strands
will
wind
tighter.
If
right
twist
thread, strands
will
unwind
or
separate.
UPPER
THREADING
Turn
machine
pulley
over
toward
you
until
needle bar
is
at highest
position.
Pass
thread
through
threading
points
as
indicated in
Fig 10.
HIGHEST
POINT
\
Ci)
Threading Needle
Fig.
10
Draw
about
2 inches
of
thread
througn
needle eye
to
start sewing.
Threading Tension Assembly
- 6 -

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LOWER THREADING
BOBBIN REMOVAL
1. Open slide plates ir, bed of machine
2. Turn machine pulley over toward you until needle
bar reaches highest
position.
3 Raise bobbin latches a:1d lift out bobbins as indicated
ir Fig 11.
BOBBIN WINDING
Place bobbin on spindle as far as it will go.
Pass the thread from the thread unwinder through
threading points as shown in Fig. 12.
Wind end
of thread around the bobbin a few times.
Press latch against bobbir,, then start the machine.
The
bobbin winder will stor autor1atically when the
amount of thread for which it is regulated is wound upon
the bobbin. For more thread on bobbin, loosen screws and
swing latch away
from bobbin, for less thread on bobbin,
swing latch toward bobbin.
Tighten screws.
It the thread does not wind evenly, loosen lock nut and
turr tension bracket up or down, as required, then tighten
lo:::,: nut.
!3obbins can be wound while the machine is sewing.
TO REPLACE THE BOBBIN AND THREAD
THE BOBBIN CASES
The following instructions apply to both bobbin cases:
Hold the bobbin between the thumb and forefinger of
the right hand with the thread from the bobbin as shown in
Fig 13, place it on
the center stud of the bobbin case,
then push down the latch as shown. Draw the thread
into the slot 1 in the edge of the bobbin case and back of
the proJection 2, leaving a loose end of thread about two
inches long above the slide. When closing the slides, leave
Just enough space for the threads to pass through,
-7 -
Fig. 11
LOCK NUT
TENSION BRACKET
G
'-'
- ~
--"-._'
' ' ----..._ -----= lj
LATCH
~
Fig. 12
LATCH
LATCH
Fig. 13

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LESS
TENSION
Fig.
14
Fig.
15
A
TENSION
STUD
Fig.
16
- 8
THREAD
TENSIONS
Tension on thread shou
Id
be
as
Iight
as
possible
yet
sufficient
to
correctly
set
stitches
in material.
NEEDLE
THREAD
TENSION
Regulate needle thread
tension
only
when
presser
foot
is
down.
To
increase
tension,
turn
thumb
nut
shown in
Fig. 14, clockwise.
To
decrease tension
turn
thumb
nut
counterclockwise.
BOBBIN
THREAD
TENSION
Bobbin
thread tension
is
regulated
by
the screw nearest
to
the center
of
tension spring on the
outside
of
the
bobbin
case
shown in Fig. 15.
Turn
machine
pulley
slowly
until
screw
is
accessible.
To
increase tension,
turn
screw inward.
To
decrease
tension,
turn
screw
outward.
THREAD
CONTROLLER
The thread
controller
should
draw
up slack thread
before
needle
point
enters
fabric
to
prevent needle
from
penetrating :hread.
To
adjust thread
control
Ier, loosen set screw
A,
shown
in Fig. 16
Turn
thread
controller
spring stop
counterclock-
wise
for
rrore
controller
action
on thread
or
clockwise
for
less
action.
Tighten
set screw
A.
Thread
controller
action
TENSION
should be increased
fer
heavy :hread and
::Jecreased
for
light
thread.
To
adjust thread
controller
action
tension, loosen set
screw B shown in Fig. 16.
Turn
tension stud
slightly
coun-
terclockwise
for
more
tension
or
clockwise
for
less
tension.
Tighten
set
screw
B.

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STITCH
LENGTH
REGULATION
1.
With
rTachine
OFF,
depress
button
shown
in
Fig.
27 on bed surface.
NEVER
DEPRESS
BUTTON
WHEN
MACHINE
IS
ON.
2.
Turn
machine
pulley
over
toward
you
slowly
until
button
drops (snaps!
into
position.
PRESSURE ON
MATERIAL
0
ressure
of
presser
foot
on mater,ai should be
as
light
as
oossible
while
being
sufficient
to
insure correct feeding
Pressure
is
regulated
by
screw shown
in
Fig. 18 at rear
of
r:1a,h:nr arm.
Turn
screv\' dciwnward
to
increase pressure
or
upward
to
decrease pressure.
REVERSE FEED
MECHANISM
To
reverse
feed
direction
by
hand, push revers8 lever
completely
down
in
order
to
have
same
stitch
length
as
in
forward
stitching
position.
3.
Turn
machine
pulley
in
direction
(+)
when
a longer
stitch
is
desired
(less
SPI) and in
direction
(-)
when
a
shorter
stitch
is
desired (more SPI).
4. Release
button.
NEVER
START
MACHINE
UNTIL
BUTTON
IS
RE
LEASED.
Fig.
17
TURN
TO
ADJUST
REVERSE
LEVER
Fig.
19
- 9 -