* Adjusting the thread take-up spring (for purl stitch)
The suitable range
of
the stroke
of
thread take-up spring 0 is from 6 to
8mm
with a starting tension
of
20
to
50 g.
For adjusting the stroke
of
the thread take-up spring ,loo
se
screw 8 and
in
sert a thin screwdriver into the slit
of
tension
po
st
@)
to turn the tension pos
t.
To adjust the tension
of
the thread take-up spring insert a thin screwdriver into the s
li
t
of
tension post
@)
to
tum
it
, with screw 8 tightened.
The
tension
of
the thread take-up spring increases when the tension post is turned
clockwise, and decrease when turned counterclockwise.
21
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ADJUSTING THE OVEREDGING LENGTH
(BUTTONHOLE LENGTH)
1.
Pull out cover 0 , and raise cover 8 .
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2.
Loo
se
n nut
@)
by the spanner supplied with the machine. Set point
G)
to a
de
sired length on
sca
le
(this length
is the same with the knife width), and then retithten nut
0 .
3. Through yow- trial sewing, adjust the overeding length accurately to the extent that the bar tacking
se
ams
are not cut by the knife.
* Changing the work clamp check
U
se
work clamp check 0 having the size nearly the same as that
of
a buttonhole
len
gth.
By
removing setscrew 0 , a work clamp checks can
be
changed together with a work clamp check holder as
a set.
22:
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ADJUSTING THE OVEREDING
WIDTH AND OVEREDGING REFERENCE POSITION
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From the library of: Superior Sewing Machine & Supply LLC
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