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Adjustment Procedures Results of Improper Adjustment
™ If the clearance is excessively
large, stitch skipping will occur,
or chain-off thread will be
unstable.
™ If the loop guide strongly comes
in contact with the needle,
needle breakage will occur.
1. Loosen setscrews 9 in the loop guide and adjust loop guide
8 to the position on the just side of sewing needle 5.
™ MP-200NS
Adjust the position so that the clearance between loop guide
8 and sewing needle 5 is 0 to 0.05 mm, and tighten setscrews
9 in the loop guide.
™ MP-200NL
Make looper guide 8 slightly come in contact with sewing
needle 5 so that the clearance between sewing needle 5
and the top end of looper 3 is 0 to 0.05 mm, and tighten
setscrews 9 in the loop guide.
(Caution) After the adjustment, check whether the spreader
does not come in contact with loop guide 8 when
the spreader advanced the most.
Adjustment Procedures Results of Improper Adjustment
1. ™ MP-200NS
Turn the handwheel in the normal rotational direction from the
lowest point of the needle bar and align the 2nd engraved
marker line A of the second from the top of needle bar 1 with
the bottom end of needle bar lower metal 2.
™ MP-200NL
Turn the handwheel in the normal rotational direction from the
lowest point of the needle bar and align the 3rd engraved
marker line B of the third from the top of needle bar 1 with
the bottom of needle bar lower metal 2.
2. In the state of step 1., loosen looper holder clamping screw 6
and adjust so that the top end of looper 3 is aligned with the
center of hook needle 4.
3. Adjust the clearance between the top end of looper 3 and
hook needle 4 to 0 to 0.05 mm and tighten looper holder
clamping screw 6.
4. Turn the handwheel in the normal rotational direction from the
lowest point of the needle bar and align the top end of looper
3 with the center of sewing needle 5.
5. Loosen looper installing base setscrew 7 and adjust the top
end of looper 3 to NS : 2 mm and NL : 3 mm from the top end
of needle eyelet of sewing needle 5. Then tighten looper
installing base setscrew 7.
(Caution) After performing the adjustment related to looper
3, be sure to turn the handwheel by hand and
operate the machine after checking that the
respective parts do not come in contact with each
other.
™ When the adjustment value is
improper, stitch skipping or
defective chain-off thread will be
caused.
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