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3.7
Adjusting the
Differential
Feed Rate
Note
When the surface of
level '3' adjustment
is on scale 2, the
differential adjustment
is 1 : 1, and if it is
on the scale, its
proportion may be
adjusted up to 1 : 0.7 .
3.8
Stitch Length
Adjustment
Important
The stitch length
adjustment is
made according to
the sewing fabric,
differential feed ratio
and other factors.
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Adjustment of the differential is the
dragging proportion between the
main feed dog and differencial feed
dog. When the movement of main
feed dog is less than that of the
differencial feed dog, the cloth will
be frilled during sewing. Otherwise,
the cloth will be stretched.
Adjust
Differential
1
1 : 3
-
1 : 2
1 : 0.7 1 : 1.0 1 : 1.4 1 : 1.7 1 : 2.0
1 : 3
1 : 1.0 1 : 1.5 1 : 2.0 1 : 2.5 1 : 3.0
1 : 4
1 : 1.1 1 : 1.6 1 : 2.3 1 : 2.8 1 : 3.3
Press button to the end and keep it
pressed as shown on figure 15.
Turn the wheel until we have the
desired stitch length. It is shown on
the wheel scale.
Dragging
Type of
Proportion
Machine
1 : 2.0
Seaming
1 : 3.0
Shirring
1 : 1.3
Serging
1 : 4.0
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Scala
2
3
4
5
1 : 0.7 1 : 0.9 1 : 1.1 1 : 1.3
Wheel Scale
1
2
3
4
1.0
1.5
2.0
2.5
0.7
1.0
1.4
1.7
1.6
2.3
3.1
3.9
0.6
0.9
1.2
1.5
High Speed Overlock Machine
Release nut '1' on figure 14, and turn
screw '2' clockwise to streching the
cloth or counter clockwise to shrink
it. Retightend the nut '1'.
Figure 14
Figure 15
5
6
7
3.0
3.5
3.8
2.0
2.3
2.5
4.7
5.4
5.9
1.8
2.1
1.0
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Instructions Manual and Parts List
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