Operation Manual

Problem
Cause
Solution
Machine
will
not
Power
supply
interrupted
Close
looper
cover
operate,
although
(see
page
9).
mainns
switch
is on
Fabric
not
Sewing
lint
between
upper
Clean
knifes
neatly
trimmed
and
lower
knife
Lower
knifeis blunt
Replaces
lower
knife
(see
page
45).
Puckered
seams
Thread
tension too tight
Reduce
thread
tension.
Incorrect
setting
of
Re-adjust
diffential feed
differential
feed
(see
pages
24.
25).
Thread
hgas
caught
due
to
Thread
correctly
incorrect
threading
(see
pages
12 —
18).
Workpiece
not
fed
Stitches
too
short
Increase
stitch
length
through
evenly
(see
page
23).
transportiert
Sewing
foot
pressure
too
Increase sewing
foot
presure
low for
heavy
fabrics
(see
page
23).
Sewing foot
pressure to
Reduce
sewing
foot
pressure
high
for
lightweight
fabrics
(see
page
23).
57