Trouble Shooting - JUKI MO-80CB Manuel D'instructions

32. TROUBLE SHOOTING

Problem
Fabric does not feed well
Needle breaks
Thread breaks
Stitch skip
Irregular stitches
Fabric Puckers
Irregular Trimming
Fabric Jams
Machine Does Not Operate
* 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.
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Solution