o Automatic start reversestitching solenoid OFF timing correction
Make
the
necessary
conection
as
in
Table
4-12
using
a
combination
of
SW6-6
(ACT
B),SW4-7
(HOSB
0)
and
SW4-8(HOSB 1).
Table
4-12
ACTB
HOSBO
HOSB
1
Correction
ON
OFF
OFF
-1
ON
ON
OFF
-0.5
OFF
ON
or
OFF
ON
or
OFF
0
ON
OFF
ON
0.5
ON
ON
ON
1
Fig.
4-14
Example
1)
With
the settingin
Fig.
4-4 there are too fewstitchesin the
reverse
direction.
a)
b)
c)
a) The pitch of the last stitch
o
o
>
is
too
short.
S
j)
b) The needleenters the same
-
These
situations
can
'
fl
) <
• J
»
point
twice.
occur
when
the
,/
ll\
(
> c) There is one stitch too few
reverse stitching
1/
<
/
/
in the reverse stitching
speed is
too
slow.
I
<
r
<
/
(one is carried over
into
the free sewing). _
Fig.
4-15
In sucha case,reset so that the
reverse
feedsolenoidgoesOFF later (+direction).
Example
2)
With
the
settings
in
Fig.
44
there
are
too
many
stitches
inthe
reverse
direction.
a)
b)
c)
a) The pitch is too short in the
9
first
stitch
of
the
free
T J
j <
c
f n
sewing.
7
f
\
<
\
b) The needle enters the same
point twice at the end
of
1/
<
if
<
1
the reverse stitching.
<
<
c) The first stitch of the free
sewing is sewn in the
reverse
direction.
-These
situations
can
occur
when
the
reverse stitching
speed is
too
fast.
Fig.
4-16
In
such
a
case,
reset
sothat the
reverse
feed
solenoid
goes
OFF
earlier
(—
direction).
-
42
-
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