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84
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Trouble
Cause (1)
Cause (2)
Checking order and adjusting procedure
Page
From the previous page
2-3)
Blade point of hook is blunt.
2-4)
State of pressing fabric is
improper.
2-5)
Adjustment of thread tension is
improper.
2-6)
Play of needle bar
3-A)
The blade point comes in
contact with the needle.
4)-A
Presser is inclined, or does not
move smoothly.
(Presser presses fabric while it
is inclined.)
4)-B
Presser pressure is too low.
4)-C
Presser is too large in terms of
the button hole.
4)-D
Fabric flops since overlapped
section is pressed.
4)-E
Fabric flops since material is of
thin knit or jersey.
5)-A
Tension at the parallel section
is too high.
5)-B
Tension or stroke of thread
take-up spring is improper.
Correct the blade point or replace the hook, and adjust the hook timing
according to item 2)-B.
Replace hinge screw for attaching the work clamp check holder.
Increase the presser pressure.
Use the presser suitable for the button hole.
Use the presser for overlapped section.
Or, decrease the number of revolution.
Use the presser for knit and jersey. Adjust the hook timing to K type
timing.
Adjust the needle thread tension to proper one. (Decrease the tension.)
Standard stroke : 8 to 10 mm Tension : 6 to 8g.
Decrease the play of needle bar. Or, replace the needle bar.
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Summary of Contents for LBH-1700
Page 1: ...R ENGINEER S MANUAL 29339504 No 04 Electronic Buttonholing Machine LBH 1700 Series ...
Page 55: ... 51 MEMO ...
Page 124: ... 120 ...
