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19
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Adjustment Procedures
Results of Improper Adjustment
Name of pattern
Stitch pattern
Max. zigzag width
Standard zigzag
8 mm
2-step zigzag
10 mm
3-step zigzag
10 mm
Scallop
8 mm
Blind stitch
8 mm
Custom pattern
–
8 mm
1) Pressing setting switch
1
, turn ON the power when performing
hook adjustment.
2) At this time, bobbin thread counter
2
displays lateral three
bars.
3) The sewing machine does not run even when depressing the
front part of pedal during the hook adjusting mode.
4) Zigzag operation works by turning the handwheel by hand.
5) For hook adjustment, make use of 2-step zigzag pattern
3
to
adjust left/right/center.
6) To return from hook adjusting mode to normal sewing mode,
turn off/on the power.
7) Set the needle bar to the position of zizag width “0”, and adjust
so that the blade point of the hook is brought to the center of
the needle at the height of the timing gauge on which “2” is
engraved. (Fig. 1)
8) At this time, adjust so that the blade point of the hook slightly
comes in cotact with the needle when the needle guard does
not come in contact with the needle (Fig. 2). Then tighten the
screw in the hook.
9) Maximize the zigzag width (see the table below). Adjust by
bending the needle guard so that the needle comes in contact
with the needle guard and does not come in contact with the
blade point of the hook at both the rightmost and leftmost needle
throwing positions. At this time, adjust so that a clearance of 0
to 0.05 mm is provided between the needle and the blade point
of the hook at the rightmost needle throwing position. (Fig. 3)
™
If the timing relation between the
needle and the blade point of the
hook is excessively advanced,
smaller thread loops will be
made particularly when the
needle throws to the right or
stitch skipping and thread
breakage will result.
™
If the timing relation between the
needle and the blade point of the
hook is excessively retarded,
larger thread loops will be made
particularly when the needle
throws to the left resulting in
tilted thread loops and stitch
skipping.
™
If the needle guard does not
come in contact with the needle,
the needle vibrates when the
sewing machine runs at high
s p e e d r e s u l t i n g i n t h r e a d
breakage and stitch skipping.
™
If the needle comes in contact
with the blade point of the hook,
the blade point will be damaged
resulting in an extraordinary
shortened service life of the
hook.
(Caution)
1. Hook is common to the LZ-2290 Series.
Part No. is 225258. Designate the hook with the part No.
when replacing it.
2. When changing the kind or size of the needle, be sure
to check the clearance between the needle and the blade
point of the hook.
3. The maximum zigzag width is regulated to 8 mm since
the standard gauge is 8 mm at the time of delivery.
