Troubleshooting - Alfa compakt 100 Manuel D'instructions

Troubleshooting

Condition
The needle thread
breaks.
The bobbin thread
breaks.
The needle
breaks.
Skipped stitches
Seam puckering
The cloth is not
feeding smoothly.
The machine
doesn't work.
Noisy operation
1. The needle thread is not threaded properly.
2. The needle thread tension is too tight.
3. The needle is bent or blunt.
4. The needle is incorrectly inserted.
5. The needle thread and the bobbin thread are not set properly
under the presser foot at the beginning of sewing.
6. The threads are not drawn to the rear after previous sewing.
7. The thread is too heavy, or too fine for the needle.
1. The bobbin thread is not threaded properly in the bobbin
case.
2. Lint has collected in the shuttle area.
3. The bobbin is damaged and doesn't turn smoothly.
1. The needle is incorrectly inserted.
2. The needle is bent or blunt.
3. The needle clamp screw is loose.
4. The needle thread tension is too tight.
5. The threads are not drawn to the rear after the previous sewing.
6. The needle is too fine for the fabric being sewn.
1. The needle is incorrectly inserted.
2. The needle is bent or blunt.
3. The needle and/or threads are not suitable for the work being
sewn.
4. The needle thread is not threaded properly.
5. The wrong needle is being used.
1. The needle thread tension is too tight.
2. The needle thread is not threaded properly.
3. The needle is too heavy for the fabric being sewn.
4. The stitch length is too long for the fabric.
1. The feed dog is packed with lint.
2. The stitches are too fine.
1. The machine is not plugged in.
2. A thread is caught in the shuttle race.
3. The clutch is disengaged.
1. A thread is caught in the shuttle race.
2. Lint has built up in the shuttle or the shuttle race.
Cause
44
Reference
Page 16
Page 20
Page 10
Page 10
Pages 18, 24
Page 24
Page 10
Page 14
Page 40
Change the bobbin
Page 10
Page 10
Page 10
Page 20
Pages 18, 24
Page 10
Page 10
Page 10
Page 10
Page 16
Change the needle
Page 20
Page 16
Page 10
Make stitch shorter
Page 40
Make stitch longer
Page 6
Page 40
Page 12
Page 40
Page 40