P-17
3. Needle and thread is
improperly selected.
3. Select suitable needle
according to the requirement
4. The presser foot is improperly
selected.
4. Select the proper presser foot
Loose stitch
1. The upper thread is not
threaded correctly.
1. Thread it again.
2. The lower thread is not
threaded correctly.
2. Thread it again
3. Needle and thread is
improperly selected.
3. Select proper needle and
thread
4. Thread tension is not set
correctly
4. Set it again.
Crinkle
1. The upper thread tension is too
large.
1. Mount it again.
2. The upper thread is not
threaded correctly.
2. Thread it again.
3. The needle is to thick.
3. Select suitable needle
4. Cloth is too thin or soft.
4. Put paper gasket under cloth
Staggering stitch
1. Thread is not uniform in size
1. Select good-quality thread.
2. The thread is not threaded
correctly.
2. Thread it again.
3. Cloth is pulled uneven.
3. Automatically feed cloth by
machine
Machine doesn’t operate
1. Power doesn’t be supplied.
1. Connect power supply.
2. Thread is blocked in the shuttle
race.
2. Take out shuttle hook and
clean it.
3. Bobbin winder spindle doesn’t
be pulled back after thread is
wound
3. Pull back bobbin winder spindle
Abnormal noise made by machine
1. The lubricant oil is exhausted. 1. Add sewing-machine oil into the
moving parts.
2. There are rags on the shuttle
race.
2. Clean shuttle race
3. Needle is broken.
3. Replace needle
Summary of Contents for MCO-5199
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