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DOUBLE CHAIN STITCH
LOOPER
THREAD TAKE-UP AND THREAD GUIDE MECHANISM
Procedures
Fit double chain stitch thread take-up 0
onto
crank
shaft.
2 Install thread handler
8 to thread take-up bracket
@)
parallel to it.
3 Install thread take-up
bracket@) to machine body.
(Insert thread handler 8 onto double chain stitch thread
take-up
0
in
accordance with the slot
of
double chain
stitch thread take-up.)
* Thread consumption and timing
of
thread release are
adjusted by moving thread handler
8.
(When the top
of
thread handler
is
raised, the looper
thread tension decreases, and when it
is
lowered, the
looper thread increases.)
4 Turn the pulley until needle bar
is
raised to the highest
position.
~
The below items
C)
and
(3
should be taken simul-
taneously.
5 Set double chain stitch thread take-up O
at
a point
where thread handler
8
is
in the center
of
the slot.
Q'ty
of
screw
2
6 Adjust the distance between the top end
of
double 2
chain stitch thread take-up
0 and thread take-up bracket
@)
to
6mm,
and fasten it.
* When double chain stitch thread take-up
is
advanced
(counterclockwise), the looper thread tension
in-
creases; and when it
is
moved back (clockwise), the
looper thread tension decreases.
7 Install thread guide (R)
8 and (L)
C)
on
thread take- 2
up bracket @), making sure that they are equi-distant
from the reference line on thread take-up holder
in
the
thread slot.
-25-
Unclockwise
Loosen
Clockwise
Tighten
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