In
case
of four-thread In
case
of five-thread
8
00
O8
0080
.:.:.
'.:
.'
.....
-;
.';-.
~.
Thread
tensian
Thread tension rnay require change depending on fabrics and threads used, bight, stitch length, the position
of
each
thread take-up, and the position
of
the thread guides.
If necessary, adjust as mentioned below.
®
o
G
1. Adjusting the overedgestitch needle thread take-up,
To increase the thread tension, lower needle thread take-uptD .
To decrease it, raise the thread take-up. The center position in
the adjustable range is standard.
2. Adjusting the double-chain stitch needle thread guide.
Raise double-chain stitch needle thread guide
@)
to increase the
needle thread tension.
Or lower it to decrease the tension.
The standard needle thread tension is obtained when the guide
is in
the
center stitch position.
Use the thread take-up for two-thread ®or for three-thread ®
as appropriate to
your
sewing purpose.
3. Adjusting the overedge stitch looper thread take-
ups and thread guide. . 4. Adjusting the double-chain stitch thread take-
up and thread guide.
=--~
Set screw
~
6'
Reference
""'~
~Loo~
4fj Tighten \1
About6
mm
OQlOI
E1J
Right hand looper
J,==8~~1=:::::::::=::::::I
thread guide
Looper thread
take-ups Jeft
(1) The above figure shows the standard positions
of
the
looper thread take-ups and each thread guide when
the needle bar is up highest.
(2)
More thread will be fed when looper thread take-ups
right
4D,
mare raised; and less
thread
when they are
lowered.
(3)
More thread will be fed when left
hand
looper thread
guide
f&
is moved
to
the left (more angle); and less
thread when it is moved to the right (less angle).
(1) Thread take-up thread guides, right
~
and left fi) ,
must be positioned symmetrically in
the
thread take-
up thread guide hole with the reference line on thread
take-up holder(li) in the center.
(2) Thread handler
fD
must be positioned parallel to the
thread take-up holder.
(3)
Adjust
the
timing of double-chain stitch thread take-
up assembly «;
to
pull back
the
looper thread when
the needle bar is in the highest position.
(The height
of
the double-chaín stitch thread take-u
p)
assembly from the thread take-up holder is about
6mm.
(4)
The looper thread loosens when the double-chain stitch
thread take-up assembly is advanced (turned counter-
c1ockwise), and tightens when
it
is delayed
(tumed
clockwíse).
- 6
