TROUBLE SHOOTING
Problem
Fabric Does Not Feed Well
Needle Breaks
Thread Breaks
Skipped Stitches
Irregular Stitches
Fabric Puckers
Irregular Trimming
Fabric Jams
Machine Does Not Operate
Solution
•
Lengthen stitch length.
•
Increase presser foot pressure for heavyweight fabric.
•
Decrease presser foot pressure for lightweight fabric.
•
Check the differential feed.
•
Insert needle correctly.
•
Do not pull fabric while sewing.
•
Tighten needle set screw.
•
Use a larger size needle on heavy fabrics.
•
Check threading.
•
Check for tangled or caught thread.
•
Insert needle correctly.
•
Insert new needle, current needle may be bent or have a blunt point.
•
Use high quality thread.
•
Loosen thread tension.
•
Insert new needle, current needle may be bent or have a blunt point.
•
Tighten needle set screw.
•
Insert needle correctly.
•
Change type or size of needle.
•
Check threading.
•
Increase presser foot pressure.
•
Use a high quality thread.
•
Balance thread tension.
•
Check for tangled or caught thread.
•
Check threading.
•
Loosen thread tension.
•
Check for tangled or caught thread.
•
Use high quality lightweight thread.
•
Shorten stitch length.
•
Decrease presser foot pressure for lightweight fabrics.
•
Check the differential feed.
•
Check alignment of cutters.
•
Replace one or both cutters.
•
Check for tangled or caught thread.
•
Compress thick layers of fabric with conventional machine before
sewing with overlock.
•
Connect machine to power source correctly.
5 – MACHINE MAINTENANCE
41