White 1911 - Page 37

TROUBLE
SHOOTING:
CAUSES
AND
REMEDIES
THREAD
FORMS
LOOPS
CAUSE
REMEDY
Thread
tension
not
properly
regulated
Read
instructions
tor
regulating
needle-and
bobbin
thread
tension
Upper
thread
not
properly
threaded
and/or
bobbin
thread
Thread
machine
properly
and/or
wind
bobbin
thread
correctly
properly
wound
Thread
size
not
suited
to
tabric
See
“Size
ot
needle
and
thread”
Thread
check
spring
not
working
properly
Have
spring
replaced
SHRINKING
OR
PUCKERING
OF
THE
SEAM
Tension
too
tight
Read
instructions
for
regulating
needle-and
bobbin
thread
tensions
Fabric
too
lightweight
to
support
stitch
Place
stabilizer
under
tacric
IRREGULAR
STITCHES
Needle
and
bobbin
threads
ot
poor
quality
Use
top
quaiity
threads
Bobbin
thread
unevenly
wound
Re-wind
bobbin
MACHINE
DOES
NOT
RUN
FREELY
AND
MAKES
NOISE
Machine
needs
oiling
Please
contact
local
dealer
Dust
and
thread
in
shuttle
Read
instructions
on
how
to
clean
shuttle
race
Drive
belt
tension
too
tight
Contact
local
dealer
-
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