JUKI DLN-6390 Manuel D'utilisation page 99

Troubles Causes (Items to be checked)
Loopng Check whether somethng s wrong wth hook.
(Play of nner hook s large or rotaton s not
smooth.)
Irregular thread Check whether thread tenson s too low.
tenson
Check whether threadng s wrong.
Check whether the sprng for dle-preventon
s weak.
Puncture of Check whether cloth s properly rolled.
cloth from
hemmng bnder
Uneven Check whether cloth s properly rolled.
materal feedng
at start and end
of sewng
Check whether poston of hemmng bnder s
proper.
Corrective measures
Replace the hook wth a new one.
Increase the thread tenson.
Properly pass the thread.
Rase the sprng or replace t wth a new one.
Adjust by handlng so that hemmng of the bottom
can be properly performed.
Adjust by handlng so that hemmng of the bottom
can be properly performed.
(It s mportant that the cloth s properly rolled by the
hemmng bnder at the start of sewng.)
Adjust the poston to a proper one.
(Rollng s stablzed when the ruler located on the
rght sde of hemmng bnder s set to the poston
where the bottom surface hardly comes n contact
wth the throat plate and the sde hardly comes n
contact wth the presser foot (asm.).)
Ref. page
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