Singer 645 - Problem and Remedies

PROBLEM
AND
REMEDIES
Trouble
Probable
Cause
Remedies
-
‘—•
‘--‘
‘‘-
-
-.
F
.
If
Machine
3hread
or
hat
rn
race-
C)ean
and
oil
mactune
the
shuttle
__•J
F
--
Skipping
-
Bent
needle
Replace
to
new
needle
(See page
10)
Stftthes
--
-
—-
.—--.-
-
I
—
Needle
need
correctly
(See
page
10)
Too
fine
a needle
for
Replace
needle
or
thread
to
conform
thread
being
used
.
each
other
(See page
9)
r-
Too
stróhy
fabric.
Place
a
paper
beneath
fabric
or
use
-
—
Ball
Point
needle
I
-I
j
nute
-.
Improper
threading.
5ee
threading
instruction
page
13
Bobbin
nOt
-
Adjust
bobbin
winder
(See
page
40)
—-
—-.,—---—--.
--——-—.‘.-.
-
Unevi
—--
flgioldi
Avodpungormateri&
just
r
Stitches
-matenal.
-
ide
it.
r
Not
enough
tension
—
—
-
-
on
upper
thread
Increase
tension
Po&
uality
thread
-
-Try
different
thread
P
Seeeedle
and thread
chart
page
9
—--S
-
-
-
—----.-
t-ZL_
t
s*_L
-
-
Upper
Thread
-
-“
;s—
Refer
to
threadinó instructions,
see
Breaking
-
-mProperlythreaded.-
page
13,
and
rethread
machine.
r
‘Too
much
-tension
Loosen
upper
thread
tension
-
—
(See
pagel8
Starting
with
tak
p-,
Always
start
sewing
with
take-up
lever
in
incorrect
position
-
in
highest
position
-
I
Improper
setting
of
-
‘.
Refer
toneedle
settinginstruction
see
-
-
needle.
-
page
10.
.
-
Bent
or
eye
of
needle
Tryariew
needle.
-
too
shp.
-
--
Discard
all
blunt
or
bent
needles
and
-
Bent
or
blunt
needle.
:
replace
with
new.
Material
-
rT.
too tight.
See
tension
adjustment,
page
18.
-
Puckering
Dull needle.
Change
needle.
-
Stitch
length
too
long.
Reduce
stitch
length.
•
Machine
noisy
Stitch
length
control
-‘
-
&
material
“
is
set
at
other
than
Set
stitch
length
control
at
Number
5
--
••
-
Improper
-
Lint
in
feed
d
-
Remove
needle
plate
and
clean
lint
from
feeding
,
-
-.
feeddog.
-
-
--
•—---—--
,—.--—--———----
-—-*-.-
-
—
a———-.-
-
•.
41