UNIPRODO VANDER PRO Bedienungsanleitung Seite 131

TROUBLESHOOTING
Problem
Fabric does not feed
well
Needle breaks
Thread breaks
Stitches skip
Irregular stitches
Fabric puckers
Irregular trimming
Fabric jams
Machine does not
Solution
• Lengthen stitch length
• Increase presser foot pressure for heavy weight fabric
Decrease presser foot pressure fir light fabric
•
• Insert needle correctly
Do not pull fabric while sewing
•
Tighten needle set screw
•
• Use a larger 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
•
blunt point
Use a 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 light weight thread
Shorten stitch length
•
Decrease presser foot pressure for light weight fabrics
•
Check alignment of knives
•
Replace on or both knives
•
Close looper cover before sewing
•
• Check for tangled or caught thread
• Compress thick layers of fabric with conventional
machine before seeing with overlock
Connect machine to power source
•
EN