Liebersew 737 - THREADING THE MACHINE; Thread tension

Refer
to the
sewing
type
you
neecl
for correct
threading.
Any
incorrect
threading
may
cause
thread
break'
uneven
stitches
or
skip
stitches
etc.
For
seamtypc
516
onlY
Fig.3
Thre€ftI&n's'ion
tubG@@
Fig.5
The
threaci
tension
be adjusted
according
to sewing
fabric,
thickness,
sewing
thread,
seam
width,
stitch
length
etc.
Therfore
the
pressure
of
the
Tension
Nuts
or
Thread
Guides
must
be
adjusted
in each
individual
case.
l.Tension
Nuts
Adjustment.
Fig.S
.
The
tension
Nut
Ocontrols
the
double
chain
needle
thread
or
left
side
overlock
needle
thread.
'
The
tension
Nut
Ocontrols
the
double
chain
looper
thread'
'
The
tension
Nut
@controls
the
overlock
needle
thread'
'
The
tension
Nut
O
controls
the
upper
looper
thread'
'
The
tension
Nut
@
controls
the
lower
looper
thread'
2. Needle
Thread
Control
Fig.6
In case
of
sewing
type
504,512,&5l4,push
Thread
guideOand
Oto
lor*'est
point.
and
up
to
highest
point fo
sewing
type
503,505.
Note:
The
(+)
direction
is
for
more
needle
thread
tension,
antl
the
(-)
direction
is for
less
needle
thread
tension.
-2-
i
ffi3
[i
:PN
Ttr'
.,,U
For
four
thread
onlY