JUKI MP-200N Series User Manual

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8. TROUBLES AND CORRECTIVE MEASURES
1.
2.
3.
Corresponding
page
P. 11,13
P. 11
P. 15
P. 11
P. 19
P. 9
P. 9
P. 7
P. 11
P. 15
P. 11
P. 11
P. 15
P. 11
Thread breakage
Thread hangnail
Stitch skipping
(on the right side of
cloth)
Stitch skipping
(on the wrong side
of cloth)
Incomplete thread
catching
Thread path, looper point or
spreader point has a scratch.
Looper, spreader, bottom surface
of feed dog and loop guide come
in contact with one another.
Thread tension is too high.
An excessive clearance is
provided between looper and
needle.
Timing between needle and
looper is not proper.
Looper comes in contact with
needle.
Loop on the right side of cloth is
fallen.
Sewing needle fails to pierce the
loop on the right side of cloth.
Loop on the right side of cloth is
too small due to high tension and
sewing needle fails to pierce the
loop.
Thread comes off hook needle
before sewing needle pierces
loop.
Looper fails to catch thread.
Spreader fails to catch thread.
Loop is not formed due to
excessive high thread tension and
looper fails to catch thread.
Loop guide fails to work and loop
cannot be formed.
Looper top or spreader top has a
scratch.
An excessive clearance is
provided between looper and
needle.
Spreader fails to catch thread.
Thread tension is too high.
Thread is thick for hook needle.
Loop guide fails to work.
Polish the scratch using a fine emery
paper or the like.
Replace the parts with new ones.
Readjust the timing or the clearance.
Reduce the thread tension.
Bring up the looper near the needle.
Readjust the timing.
Readjust the clearance between needle
and looper.
Tighten the thread tension.
Adjust the thread take-up thread guide,
right.
Adjust the stroke of the thread take-up
spring.
Turn the needle bar and adjust so that
the sewing needle pierces the center of
loop on the right side of cloth.
Turn the needle bar and adjust so that
the sewing needle pierces the center of
loop on the right side of cloth.
Delay the feed timing.
Increae the feed pitch.
Reduce the clearance between needle
and looper.
Readjust the spreader.
Reduce the thread tension.
Bring up the loop guide near the needle.
Polish the scratch using a fine emery
paper or the like.
Reduce the clearance between looper
and needle.
Readjust the spreader.
Reduce the thread tension.
Use a thick needle.
Readjust the loop guide.
Corrective measuresCausesTroublesNo.

JUKI MP-200N Series Specifications

General

Brand	JUKI
Model	MP-200N Series
Category	Sewing Machine
Language	English