JUKI DDL-8000A Engineer's Manual page 57

Direct-drive, high-speed, automatic thread trimmer
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Adjustment Procedure
4) Response to problems occurring at the beginning
of sewing
○ In the case needle thread breakage occurs when using a thin
thread or fragile thread
○ In the case needle thread is not tucked on the wrong side of ma-
terial
○ In the case needle thread breakage occurs when starting sewing
from the material end (such as sewing the material with needle
thread tucked on the undersurface of material)
If any of the aforementioned problems occurs, the assist function
which works to reduce the presser foot pressure at the beginning of
sewing can be set by using the auto-lifter device ❹.
When P161 is set to "1", the assist function is activated.
1.
Press
.
2.
Press the
3.
Press the
the value.
4.
Press the
switch to determine your selection.
No.
Presser lifting operation at
P161
holding thread ON/ OFF
Angle at start of presser lifting
P162
operation starts when the thread
is held
Setting of presser lifting amount
P164
at holding thread
Presser lifting operation time
P165
when the thread is held
switch to select the item number in the table.
switch to activate the setting section, and press the
Items
Selects ON or OFF of the presser
lifting operation when the thread is
held.
1 : Lifting operation activated
0 : Lifting operation deactivated
Sets the angle at the start of the
presser lifting operation when the
thread is held.
Sets the amount of the presser
lifting movement when the thread
is held.
Sets the presser lifting operation
time when the thread is held.
Results of Improper Adjustment
○ If the automatic presser lifter ❹
is not used, set the presser foot
pressure to a lower level to make
it easier for the thread between
the presser and material to be
sewed to come out. (The recom-
mended presser foot pressure is
30 N (3 kg) or less.)
Adjust the presser foot pressure
and the sewing speed appro-
priately to prevent insufficient
feed efficiency due to jumping or
other faults of the presser foot.
Confirm the adjustment result by
actually sewing the material.
Description
– 44 –
switch to adjust
Initial
Range
value
0 to 1
0
0 to 359
100
0 to 500
340
1 to 990
20

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