116LS2-B891, LT2-B892
17. TROUBLESHOOTING
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Possible cause
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Is the material being pushed or pulled with excessive force during sewing?
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Is the needle properly installed?
If it is incorrect, install the needle correctly.
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Is the needle bent, is the needle tip broken, or is the needle hole blocked?
Replace the needle.
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Is the needle and feed timing correct?
Adjust the needle and feed timing.
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Is the needle and rotary hook timing correct?
After adjusting the needle bar height, adjust the needle and rotary hook
timing.
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Is the needle guard position correct?
Adjust the position of the needle guard.
Quick reverse sewing, start backtacking and end backtacking <-705 specifi-
cations>
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Is the needle down stop position correct?
Adjust the needle down stop position.
Problem
8. Needle breaks
Caution
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It is extremely dangerous to leave any pieces of broken needle stick-
ing in the material. If the needle breaks, searh for all pieces until the
whole of the needle is found again.
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Furthermore, we recommend that through steps be taken to account
for such needles to comply with product liability regulations.
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