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Stitches Skipping
Possible Cause:
Needle(s) may have a bent, dull or broken point.
Solution:
Replace needle(s) (page 14).
Possible Cause:
Needle may not be properly seated in the needle clamp.
Solution:
Insert needle so that it is all the way up in the needle clamp, then tighten the screw securely.
Possible Cause:
Needle may not be the correct size for the fabric being sewn.
Solution:
Use a needle size that is compatible for the fabric (page 23).
Possible Cause:
Machine may not be threaded correctly or threads were threaded in the incorrect sequence.
Solution:
Check that machine is threaded in correct order as shown in machine manual (from left to right).
Possible Cause:
Using thread that is poor quality or has uneven filament.
Solution:
Use good quality thread with a smooth, even filament.
Irregular Stitches
Possible Cause:
Stitches are not balanced.
Solution:
Adjust thread tensions and possibly cutting width (page 20, page 52).
Possible Cause:
Thread is not unreeling smoothly off the thread spool.
Solution:
Check the thread spool to ensure thread is not getting caught.
Place the thread spool and spool cap as shown on page 24.
Possible Cause:
Machine may not be threaded correctly or threads threaded in the incorrect sequence.
Solution:
Check that machine is threaded in correct order (from left to right).
Fabric Puckers
Possible Cause:
Thread tensions are set too tightly.
Solution:
Loosen thread tensions (page 20, page 55).
Possible Cause:
Thread is not unreeling smoothly off the thread spool.
Solution:
Check the thread spool to ensure thread is not getting caught.
Place the thread spool and spool cap as shown on page 24.
Possible Cause:
Using thread that is poor quality or has uneven filament.
Solution:
Use good quality thread with a smooth, even filament.
Possible Cause:
Stitch length is set too short.
Solution:
Adjust stitch length to a longer setting (page 53, page 20).
Possible Cause:
Differential Feed is not set in the correct position for the fabric being sewn.
Solution:
Adjust the differential feed (page 20, page 54.
Irregular Trimming
Possible Cause:
Upper— and stationary cutters are not in proper position.
Solution:
Check alignment of cutters (page 57).
Possible Cause:
Cutter(s) are damaged or worn out.
Solution:
Replace one or both cutters (page 57).
7 Maintenance
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