Trouble examples and Corrective actions
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Chapter 9
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QS10
2-2. Needle breaks
If the followings seem to cause the trouble, please ask the distributor for information.
(a) Abrasion of needle catcher of rotary hook. A clearance between needle and hook point is not suitable.
(b) Improper needle location. Play of needle bar case (in right and left direction) is big.
(c) The floor vibrates. There is a play around the frame.
2-3. Embroidery results not good
If the followings seem to cause the trouble, please ask the distributor for information.
(a) There is a play around the frame.
(b) Abrasion and breakage of neighboring parts of take-up lever drive and needle bar drive.
(c) Bad take-up lever timing.
(d) Belt tension of drive system is too strong or too weak.
(e) Setting for the machine does not match embroidery condition.
Cause Troubleshooting
Improper thread tension Adjust tension.
Density of design data is very high. Correct data. Delete unnecessary underlay stitching.
The material is too thick or hard. Use material suitable for embroidery.
Bobbin is deformed and it touches the needle. Replace the bobbin.
Deterioration of needle, mismatching to embroidery
condition
Use good quality needle. Use needle that fits to
embroidery condition.
Vibration of the machine is big. Adjust leveling.
Cause Troubleshooting
Improper thread tension Adjust tension.
Poor thread flow Use good quality thread. Spray silicone.
Density of design data does not match with material
and/or thread.
Correct data.
Bad frame attaching and fixing of the fabric Attach the frame correctly. Fix the fabric firmly.
The combination of thread, needle and the size of nee-
dle plate is inappropriate to the embroidery condition
.
Make combination that fits to design data/material.
R.P.M. is too high. Decrease R.P.M.
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