Siruba C007K Instruction Book page 33

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11!28/Fig.28
2. After manual adjusting the rotary knob
<D ,
the moving distance of current feed teen
can be known by the indicated number on
the scale plate@ .
3. Turning knob
<D
clockwise can lengthen
the stitch length, turning it
counterclockwise can shorten the stitch
length.
4. The adjusted stitch length can affect the
differential ratio, so the differential ration
should be adjusted after adjusting the
stitch length.
:----------------- ---------------------------------------------------- -------------- - ------- - ------ -----------------------------------------------------------------------------
!
~!J.Jt~~ffl]~
ADJUSTING DIFFERENTIAL RATIO
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:
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~~2~!1Jt~~fA£
1: 1
~~~
1: 7. 6
0
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'
~~i8~ 1mm~
7. 6mm o ( If!
28)
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-28-
The differential ratio
=
rear feed dog stroke:
front feed dog stroke
1. The differential ratio can be adjusted from
1:1
to 1 :7.6.
2. Adjust the rotary
knob~
by hand to
adjust the front feed dog stroke. The
adjustable range is 1
mm~
7.6mm. (Fig.28)
3. After manual adjusting the rotary
knob~
,
the feed dog stroke can be known by the
indicated number on the scale plate@ .
4. Turning the
knob~
clockwise when
sewing the elastic fabric.
5. Turning the
knob~
counterclockwise
when sewing the shrink fabric.