JUKI MO-6000S series Engineer's Manual page 67

Adjustment Procedures
1) Perform the adjustment by the setscrews. Position of the needle
thread guide 1 and needle thread take up 2 lever is a very
important decisive factor when making soft chains since the
needle thread take-up amount is increased in this case. So,
carefully position these parts.
Large
1
2) Set distance I a little smaller when
using synthetic thread or the like
which tends to form stitches swelling
out of the cloth edge.
A smaller I is effective for preventing
stitch skipping.
3) Distance J is related to the vertical knotting point of the upper
and lower looper threads.
Set this distance larger for wooly thread, and set it smaller for
thin thread which is likely to cause stitch skipping.
4) It is desirable to set distance K larger for stretchy threads such
as wooly thread.
5) Set distance L a little larger when making blind hemming soft
chain stitches.
6) Set distance N a little smaller for blind hemming or making soft
chain stitches.
7) Set distance O larger if stitch skipping occurs due to looper
thread slack.
Set it smaller for better appearance and touch of produced
stitches when wooly thread is used.
Lower looper
Needle
Upper looper
Small
a Needle thread
take-up amount
2
Upper looper
Thread slack
Thread slack
Results of Improper Adjustment
™ Distance a
W h e n s e t s m a l l e r , b e t t e r
tightness of needle thread
stitches will be obtained.
When set larger, loose needle
thread stitches will result.
™ Distance E, F and H exert least
influence on stitch formation,
however, improper setting of
these distances will cause
contact between the moving
parts.
™ Distance J
When set larger, the amount of
the upper looper thread will be
increased.
When set smaller, the amount
of the upper looper thread will
Swell out
be decreased.
™ Distance K
When set larger, the amount of
the upper looper thread will be
increased.
When set smaller, the amount
of the upper looper thread will
be decreased.
™ Distance L
When set larger, the amount of
the upper looper thread will be
increased.
When set smaller, the amount
of the upper looper thread will
be decreased.
™ Distance N
When set larger, the amount of
the upper looper thread will be
increased.
When set smaller, the amount
of the upper looper thread will
be decreased.
™ Distance I
When set larger, the amount of
the upper and lower looper
threads will be increased.
When set smaller, the amount
of the upper and lower looper
threads will be decreased.
™ Distance O
When set larger, the amount of
the upper and lower looper
threads will be decreased.
When set smaller, the amount
of the upper and lower looper
threads will be increased.
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