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54
Oiling the Machine
Open looper cover and side covers.
It is recommended to apply oil once a
week in normal use, once in ten hours in
continuous use.
Apply a few drops of fine quality sewing
machine oil to the parts indicated with arrows.
Troubleshooting
Condition
Cause
Reference
1. The feed dog is packed with lint. See page 52.
2. The presser foot has been raised.
Lower the presser foot.
The fabric is not being
fed smoothly.
The needle breaks.
1. The needle is incorrectly inserted.
2. The needle is bent or blunt.
3. The fabric is being pulled too strongly.
Pull the fabric lightly.
The thread breaks.
1. The machine is not correctly threaded.
2. The needle or looper thread tension is too tight.
3. The needle is incorrectly inserted.
Skipped stitches.
1. The needle is bent or blunt.
2. The machine is not correctly threaded.
The seam is not
sewn neatly.
1. The needle and/or looper thread tensions are not correctly
adjusted.
2. The machine is not correctly threaded.
3. The needle and/or the thread are not suitable for the fabric
being sewn.
4. The thread is not correctly inserted in the tension unit.
Seam puckering.
1. The needle or looper thread tension is too tight.
2. The machine is not correctly threaded.
3. The differential feed dial is not correctly adjusted.
The machine does
not operate.
1. The machine has not been plugged in firmly.
2. The power switch is turned off.
The fabric is not
cut neatly.
1. The position of the upper knife is not adjusted properly. See page 53.
2. The upper knife is dull.
Replace the upper knife.
Touch screen is not clear. 1. The screen brightness is not adjusted properly.
Turn the knob to correct.
See page 9.
See page 9.
See pages 10–23 and 31–35.
See pages 38–45.
See page 9.
See page 9.
See page 10–23 and 31–35.
See pages 38–45.
See pages 10–23 and 31–35.
See pages 25,27.
See pages 13,15,18,20 and 22.
See pages 38–45.
See pages 10–23 and 31–35.
See page 46.
See page 5.
See page 5.
(See page 8.)
Summary of Contents for CompuLock
Page 1: ...INSTRUCTION BOOK CompuLock...