JUKI MF-7800D Series, Руководство инженера

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5-8) Single chain thread cast- 8-A) Needle A-1) Needle bend, improper needle Replace the needle with the new one,
off (Right, Middle, Left) attaching and wrong needle Use UY128GAS.
8-B) Needle height B-1) Needle bar position is too high. Refer to the standard adjustment figures.
8-C) Threading C-1) Incorrect threading refer to threading diagram.
8-D) Throat plate D-1) R of stitch tongue in throat plate is Increase R. Polish correctly.
too small.
8-E) Looper E-1) R of looper’s ventral section is too Replace it with the genuine part.
large and ridge line is not tense, for
which needle thread is likely to slip
from looper.
8-F) Looper adjustment F-1) Too little contact amount between Refer to the standard adjustment figures.
looper’s back and needle
8-G) Thread tension G-1) Thread tension is too weak. Increase tension.
8-H) Needle thread guide rod H-1) Low position of thread guard Lift thread guide position
results in too large needle thread loop.
8-I) Thread guard position I-1) Thread guard position is too high. Refer to the standard adjustment figures.
8-J) Auxiliary thread tension J-1) Use of nipper could easily generate Do not use nipper.
adjustment this trouble.
8-K) Looper thread cam thread K-1) Drawing-in amount of looper thread Refer drawing-in amount of thread.
guide position is too much.
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Trouble (1) Trouble (2) Cause (1) Cause (2) Corrective measures
Incorrect polishing
R