JUKI LBH-1700, Engineer'S Manual

Page: 90 / 126

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86
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Trouble
Cause (1)
Cause (2)
Checking order and adjusting procedure
Page
From the previous page
4. Needle thread remains.
3-4)
Number of stitches at the start of sewing is too small.
3-5)
Thread slip-off due to hangnail of thread
3-6)
Main shaft stop position is improper.
3-7)
Number of revolution at the start of sewing is too high. (In case of tetron thread)
4-1)
Thread tension is improper.
4-2)
Main shaft stop position is improper.
4-3)
Needle thread trimmer is positioned too high.
4-4)
Closing amount of needle thread trimmer is too small.
4-5)
Position of needle thread trimming is extremely to the right.
4-6)
Set value of tie stitching on the panel is improper.
6)-A
Adjustment of origin sensor
1)-A
Setting of needle thread tension (at the end of sewing) is improper.
1)-B
Setting of needle thread tension (at the time of thread trimming) is improper.
2)-A
Adjustment of origin sensor
6)-A
Width of tie stitching is too narrow.
6)-B
Number of stitches of tie stitching is too many.
Increase the number of stitches at the start of sewing. Data No. 26 Refer to “1. Needle thread breakage” of trouble. Refer to the item (1) of “Adjusting procedure of the upper detecting plate”. Refer to the memory switch, and decrease the number of revolution of the soft-start. Change the data of the memory switch. Change the data of the memory switch. Refer to the item (1) of “Adjusting procedure of the upper detecting plate”. Lower the trimmer to such an extent that it does not come in contact with the presser. Increase the closing amount with the needle thread trimmer guide A. Adjust the most advanced amount of needle thread trimmer to 5 mm. Widen the width of tie stitching. Decrease the number of stitches of tie stitching.
(See page 56.) (See page 46.) (See page 63.) (See page 63.) (See page 46.) (See page 24.) (See page 24.) (See page 24.) (See page 56.) (See page 56.)