White 4075 - Trouble Chart

P2g852
]
7.
iFOPLE
CHART
PROBLEM
PROBABLE
CAUSE
I
CORRECTION
3eaking
ower
thread
Thread
not
wound
evenly
on
the
bobbin
or
not
drawn
up
correctly
1
P.19,
P.7,
8
Lower
thread
tension
too
tight
P.56,
57
Lint
stuck
in the
bobbin
case
and
inside
the
tension
spring
Remove
lint
and
fluff
with
a
cleaning
brush
Skipping
stitches
Needle
not
fully
inserted
P.22
Needle
bent
or
burred
P.22
Size
or
type
of
needle
and
thread
not
suitable
for
the
material
P.24
I
Incorrect
upper
threading
P.7
The
much
oil
on
the
machine
P.50
Irregular
stitches
Incorrect
size
of
needle
for
the
material
P.24
Upper
thread
tension
too
loose
P.16
Incorrect
lower
tension
P.56,
57
The
matena
not
fed
Pattern
selection
dial
not
set
correctly
P.26
correctly
Feed
teeth
are
down
p.48
Lint
stuck
on
the
feed
teeth
P.49
Noisy
machine
Check
for
thread
in
shuttle,
the
slightest
amount
of
threadin
P.49
!
shuttle
may
cause
noise
or
binding,
use
material
like
tooth
P.58
pick
or
cotton
swab
to
clean.