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Trouble
Cause (1)
Cause (2)
Check and corrective measures
From the previous page
8-5) Pressing is inappropriate.
5-A)
The presser is floating.
Readjust the position of the presser bar holder.
5-B) The parallel level of the presser
is inappropriate.
Replace the presser, or loosen the presser bar
holding screw and correct the foot bend.
5-C) The pressure is too low.
Increase the pressure of the presser.
8-6) Threading is inappropriate.
6-A) Threading of the needle thread
is improper.
Correct threading.
6-B) The needle bar thread guide is
defective.
Try using B1418227T00 or B1418552A00.
9.
Material fiber breaks.
Material fibers are broken by the
needle during sewing.
9-1) The needle is defective.
1-A) The needle heat is too high.
Use silicon.
1-B) The needle is too thick.
Use a needle as thin as possible.
1-C) The needle tip is blunt.
Replace the needle.
1-D) The shape of the needle tip is
inappropriate. (Different needle
type)
Use a ballpoint needle. (KN, S, J, B, U, Y, etc.)
9-2) The sewing speed is too high.
Reduce the sewing speed. (Prevention of nee-
dle heat)
9-3) The material is excessively
tense.
3-A) The needle hole of the throat
plate is too small.
Use a throat plate with a larger needle hole.
3-B) The pressure is too high.
Reduce the pressure as low as possible.
3-C) The height of the presser tooth
is too high.
Lower the height of the presser tooth as low as
possible.
9-4) The room humidity is too low.
Keep the humidity at approx. 65% to prevent
needle heat, electrification, and friction.
9-5) The feeding pitch is too small.
Increase the feeding pitch as large as possible.
