Troubles And Corrective Measures - JUKI LBH-1790AB Manual De Instrucciones

2. Selection of the sewing machine model
1) When you turn the power ON for the first time
after the purchase of your sewing machine, the
model confirmation screen is displayed. Press
READY key ❶
2) When the error code "E001" is displayed on the
screen, turn the power OFF.
3) Then, re-turn the power ON. The language selec-
tion screen is displayed. Select one language to
be displayed and press RETURN key ❷
1) 2)
3. Memory switch data
(1) Level 1
No.
U006 Needle thread tension at sewing end
setting
U007 Needle thread tension at thread trim-
ming setting
The remaining length of bobbin thread will be shorter as the needle thread tension is de-
creased at the end of sewing and at the time of thread trimming. Be aware that seam can
ravel if the needle thread tension is excessively decreased.
(2) Level 2
No.
K025 Selection of the shorter-thread remaining function
With or without the shorter-thread remaining function is
selected using this memory switch.
With the shorter-thread
remaining function
(LBH-1790AB)

4. Troubles and corrective measures

Troubles
1. Remaining length of 1. Needle thread tension is excessively high
the bobbin thread is
long.
2. Bobbin thread tension is too low.
3. Thread trimming position is wrong.
4. Bobbin thread supplementary plate is im-
5. Bobbin thread hauling plate is improperly
2. Longer needle 1. Needle thread tension is excessively low
thread remains at
the end of sewing.
2. Position of needle thread trimmer is too
※ Refer to "VI. MAINTENANCE 2. Adjusting the needle thread trimmer" in the Instruction Manual for the LBH-1790A.
.
3)
Item
Item
Without the shorter-
thread remaining
function (LBH-1790A)
Causes
at the end of sewing and at the time of
thread trimming.
properly positioned.
positioned.
at the end of sewing and at the time of
thread trimming.
high.
– 4 –
.
❶
Setting range
0 to 200
0 to 200
Setting range
ー
Corrective measures
○ Decrease the needle thread tension
at the end of sewing and at the time of
thread trimming.
○ Increase the bobbin thread tension.
○ Correct the sewing end position.
○ Correct the position of the bobbin
thread supplementary plate.
○ Correct the bobbin thread hauling
plate.
○ Increase the needle thread tension at
the end of sewing and at the time of
thread trimming.
○ Lower the needle thread trimmer to
such an extent that it does not come
in contact with the presser.
❷
Edit unit Initial value
1 15
1 15
Edit unit Initial value
ー
With the
short-
er-thread
remaining
function
Page
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