·3
In case
of
slwrring
Set
the scale
on
differential feed arm 8
to
a larger
number than
that
of
the scale
on
main feed arm O.
*
Even
in case you adjust stitch length by changing the movement
of
main feed arm
0,
make sure
to
remain differential
ratio unchanged
as
before without fail.
Note:
If
the main feed arm 0 and dif-
ferential feed arm 8 are set
to
any
scale value greater than those shown
at right, the feed dogs will hit the
edges
of
the slots in needle plate.
~
s
-
Normal stitching
Denim
Ruffler
Bulky
Main
feed arm
Differential
feed arm
3.6mm
6.5mm
3.3mm
9.0mm
2.5mm
9.0mm
7.
SEWING INSTRUCTION
[I]
SINGLE-NEELDE, TWO-THREAD
* Thread tension means the tension
of
the thread pulled in the running direction after the tension disc.
No.
Cloth
Thread Needle
size
Differential
Stitch length
Needle thread Looper thread
ratio
tension tension
1
Wool, polyester,
Cotton
#60/2
#11
1
3--
3.6
18--
28
8--
18
thin trouser fabrics
Wool, polyester,
2 medium-thick
"
"
"
"
"
"
trouser fabrics
3
Knit fabrics,jersey
Wooly nylon
"
1--
1.5
2--3
10--20
15--
25
Note
on
Item
1:
Edges tend to curl when sewing thin materials. So decrease the
hemming width
(to
about 3
to
4mm)
and reduce the thread tensions
to such an extent
that
the stitches will not be
out
of
shape.
Better stitches can be obtained
by
increasing the over looper tension
a little above the normal level.
Note on Item 2:
Looper thread
~
Needle thread
Edges will not curl when sewing medium materials. Hemming width may be increased up
to
6mm,
and stitch length up
to 3.6mm.
Note
on
Item 3:
It wooly nylon thread is used for
both
the needle and the loopers, or only for the loopers, cloth edges
neatly.
The smaller the stitch length the better will be the finished stitches.
(
Needle thread: Synthetic thread
Looper thread: Wooly nylon thread
-28-
(
Needle thread: Wooly nylon thread
Looper thread: Wooly nylon thread
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