3} Important Points In Adjustment - JUKI MO-6000G Series Engineer's Manual

3) Important points in adjustment
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Increase the thread take-up amount of the needle thread take-up lever.
Refer to the adjustment values related to the needle thread guide and needle thread take-up lever.
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Reduce the feed of the looper threads. (Mainly lower looper thread)
Set
J,
K, Land M for the soft chain distances.
Fine adjustment of J and M is required to produce even stitches.
(3) Adjsut the thread tension while checking the appearance and touch of the stitches produced.
1) Minimize the needle thread tension as far as satisfactory tightness of needle thread stitches is
obtained.
2) Increase the upper looper thread tension as much as possible.
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If the chain:.off thread does not stretch satisfactorily, and if
it is not satisfied, proceed with the
following.
1) Increase the upper looper thread tension.
2) Further increase distances J and K.
3)
Further increase the upper looper thread tension.
4) Increase the lower looper thread tension to a maximum as far as good tightness of needle
thread stitches is maintained.
5) Increase the thread take-up amount. If the needle thread is poorly tensed, increase the needle
thread tension.
@ Fine adjustment for producing stitches with better appearance and touch
1) If the knotting point varies at high or low sewing speed, slightly reduce L, and increase the
lower looper thread tension.
2) If a knot is made at a high point, increase J and I.
3)
If the needle thread is likely to break, decrease the thread take-up amount and lower the needle
thread tension.
®
Pay attention to the following
1)
Minimize the needle thread tension as far
as
satisfactory tightness of needle thread stitches is
obtained.
2)
The knot of upper and lower looper threads should be made near the upper edge of a material.
3)
Minimize the lower looper thread tension as far as even stitches are maintained.
4)
For a safety stitch machine, adjust the soft chain making mechanism so that uniform chain-off
thread is produced during double-chain stitching and overlocking.
Upper looper thread
guide (middle)
Upper looper thread guide (upper)
G K
17 5
14 Upper looper thread guide (right)
Lower looper
thread guide
Lower looper thread tako-up
Soft chain stitches
The value
given
in ( ) parentheses
is the adjustment value for the
safety stitch machine. (Unit : mm)
When the chain-off
thread
is
pulled.
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~ s a e s s :
Looper thread should not be
loosened and stretch well
Standard stitches
When the chain-off
~lftf'li"trw'll"'I / /
~
thread is pulled.
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The looper
thread
loosens
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