Troubleshooting
Trouble Causes Solution
Top thread
broken
1. Improper top threading.
2. Excessively tight top tension.
3. Blunt or bend needle.
4. Improper fixing of needle.
5. At start of sewing, top thread and bottom thread are not
correctly fixed beneath the presser.
6. At end of sewing, the yarn is not threaded to back.
7. Excessively thick or too thin thread relatively to the
needle.
Check or thread the top
thread again.
Check or change the
needle.
Breaking of
bobbin thread
1. The yarn of bobbin is not correctly threaded into bobbin
case holder.
2. Cotton flock collected on bobbin case holder.
3. The bobbin is damaged and impossible to smoothly
rotate.
Clean the shuttle/bobbin
case.
Adjust tension of top
thread.
Needle- broken
2. Blunt or bend needle.
3. Loosing of needle set screw.
4. Excessively tight top tension.
5. At end of sewing, the yarn is not threaded to back.
6. Too thin needle.
Check and change proper
needle
Skipping stitch
fabric.
1. Improper fixing of needle.
2. Blunt or bend needle.
3. The needle and (or) thread is unsuitable for the used
4. Improper top threading.
5. Incorrect selected needle.
Check and change proper
needle.
Check and threading the
top thread again.
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