~Looper
thread
~Needle
thread
C Looper thread
~Needle
thread
Even if wooly nylon thread
is
used
as
needle thread, there will be no skipped
stitches because the thread tension
is
small.
~
SINGLE-NEEDLE, THREE-THREAD
No.
Cloth
Thread
Needle
size
Differential
Stitch length
Needle thread
Over looper
Under looper
ratio tension
thread tension thread tension
1
Knit under wear
Cotton
#60/2
#9
1
"'
1.5
2"'
2.5
43
"'73
6
"'22
6"'22
material
2
"
Synthetic
#60
"
"
"
40-70
4-18
4-18
3 Thin knit fabrics Synthetic
#60
#11
1-2
2-25
40-70
4--18
4-18
4
"
Wooly nylon
"
"
"
30
"'50
4-15 4-15
5
Thick knit fabrics
Needle:
Synthetic
#60
#14
2-3
2.2"'2.8
so--so
4-15
4
"'15
Looper: Woolen
Knit underwear
6
material
Cotton
#60/2
#9
1
"'
1.5
2"'2.5
15-25
8"'
15
22
.....
32
(Blind hemming)
7
"
Wooly nylon
"
"
"
10--20
2
"'10
6-18
Notes
on
Items I to 3:
Stitches will change when the over looper thread take-up (R) is raised or lowered
as
shown below.
Be
careful not
to
lower the thread take-up
so
much because stitches at high speed will become different at low speed
or vice versa.
Raise when thread
is
tense. Lower when thread
is
loose.
©
If
the work becomes damaged:
~
1)
Decrease the presser pressure
to
2 to 3kg,
or
by about
I2
to
IS screw threads.
A smaller pressure
is
effective for preventing work slipping in ordinary sewing, too.
2) Make the angle
of
feed dogs less sharp.
When buffing the feed dogs, hold them horizontally.
Remember not to
buff
them too much because excessive
buffing will lower feed efficiency.
©
If
fiber breaks
by
needle:
I)
Cool the needle thread.
2)
Use
a smaller needle (selecting one in the range
of
#7
to
#9).
3)
Use
a well-shaped light ball point (Schmetz), S-point
{Organ), or knit needle
KN
(Organ).
-29-
~Smooth
of
comers
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