Brother International EF4-B561 Service Manual - Page 36

STITCHING, Overlock, Stitch, CHECK, POINT, ADJUSTMENT, Blunt, Flaws

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Da SKIP STITCHING (Overlock Stitch) CHECK POINT ADJUSTMENT PAGE 1 Wrong threading. Refer to threading diagram. 2 Excessive pressure of tension disc. Adjust to proper pressure. 28 In case skipping between over looper and needle. 1 Wrong position of looper thread take-up. 2 Little movement into the left of over looper. 1 3 Large clearance between needle and over looper. ----. Adjust to proper position. 24 Adjust the position of over looper for proper 19 movement. Adjust over looper and under looper for proper clearance between needle and over looper. 18 19 4 Incorrect height of needle bar. --+ Adjust to proper height. 17 * In case of skipping between over looper and under looper. 1 Large clearance between under looper and over looper. 1 2 Top of over looper blunt or bent. Adjust to proper clearance. 20 Chnange it for a new one or smooth with 19 oil stone or buff. 0-a Blunt * In case of skipping between under looper and needle. 1 Large clearance between under looper and needle. 1 2 Top of under looper blunt or bent. Adjust to proper clearance. 18 Change it for a new one or smooth with oil 18 stone or buff. • Blunt Flaws 3 Incorrect height of needle bar. 4 Wrong timing of under looper. Adjust to proper height. 17 Adjust to proper timing. 18 - 34 -

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Da
SKIP
STITCHING
(Overlock
Stitch)
CHECK
POINT
ADJUSTMENT
PAGE
1
Wrong
threading.
2
Excessive
pressure
of
tension
disc.
In
case
skipping
between
over
looper
and
needle.
1
Wrong
position
of
looper
thread
take-up.
2
Little
movement
into
the
left
of
over
looper.
1
Refer
to
threading
diagram.
Adjust
to
proper
pressure.
Adjust
to
proper
position.
Adjust
the
position
of
over
looper
for
proper
movement.
3
Large
clearance
between
needle
and
over
looper.
----.
Adjust
over
looper
and
under
looper
for
proper
clearance
between
needle
and
over
looper.
4
Incorrect
height
of
needle
bar.
--+
Adjust
to
proper
height.
*
In
case
of
skipping
between
over
looper
and
under
looper.
1
Large
clearance
between
under
looper
and
over
Adjust
to
proper
clearance.
looper.
1
2
Top
of
over
looper
blunt
or
bent.
Chnange
it
for
a
new
one
or
smooth
with
oil
stone
or
buff.
Blunt
0-
a
*
In
case
of
skipping
between
under
looper
and
needle.
1
Large
clearance
between
under
looper
and
needle.
Adjust
to
proper
clearance.
1
2
Top
of
under
looper
blunt
or
bent.
Change
it
for
a
new
one
or
smooth
with
oil
stone
or
buff.
Blunt
•
Flaws
3
Incorrect
height
of
needle
bar.
Adjust
to
proper
height.
4
Wrong
timing
of
under
looper.
Adjust
to
proper
timing.
28
24
19
18
19
17
20
19
18
18
17
18
-
34
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