27. SEWING CONDENSED STITCHES
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of
the sewing machine.
It is possible to change the stitch length of the nor-
mal feed pitch by operating switch
1
or reverse feed
control lever
2
during sewing.
1) Tilt the machine head, and loosen three xing
screws
4
of the reverse feed solenoid
3
.
2) Slide reverse feed solenoid
3
in the direction of
the arrow to adjust so that the center of screw
4
is aligned with engraved marker line
5
repre-
senting the condensation stitch length. Then x
the solenoid with setscrews
4
.
3) To return the stitch length back to the initial set-
ting (to reset), slide reverse feed solenoid
3
in
the direction of arrow
A
until it comes in contact
with the end face of slit in bed strut B
6
. Then,
x the solenoid at that position with setscrews
4
.
1
2
Sewing direction
Condensed stitch
6
3
4
A
5
28. FEED CONVERSION SPRING MECHANISM (DDL-9000B-S , -M )
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of
the sewing machine.
B
A
1
2
3
4
Direction of reverse
feed stitching
Direction of reverse
feed stitching
Sewing direction
Sewing direction
Shorter
Shorter
Shorter
Shorter
In automatic reverse stitching, in case the forward and the reverse stitches do not match, a rough correction
can be made by adjusting the feed adjustment spring hook
1
.
* To make a ne correction, the correction of timing of the reverse feed stitching solenoid is nec-
essary by adjusting Function Setting Nos. 51, 52 and 53. Refer to the Instruction Manual for the
control box (SC-920) for details of adjustment procedure.
1) In case the stitch does not match the target as shown in
3
, loosen feed adjustment spring hook xing
screw
2
, make
1
slide in
A
direction, and x using the screws
2
.
2) In case the stitch does not match the target as shown in
4
, loosen feed adjustment spring hook xing
screw
2
, make
1
slide in
B
direction, and x using the screws
2
.
– 23 –
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