Troubleshooting - TriStar SM-6000 Instruction Manual

Instruction manual
TROUBLE SHOOTING
Problem
Upper thread breaks
Lower thread breaks.
Skipped stitches
Needle breaks
Loose stitches
Seams puckering
10
Cause
• The machine is not threaded correctly.
• The thread tension is too tight
• The thread is too thick for the needle.
• The needle is not inserted correctly.
• The thread is round wound the spool pin.
• The needle is damaged.
• The lower thread is not inserted correctly.
• The upper thread tension is too loose.
• The needlenis not inserted correctly.
• The needle is damaged.
• The wrong size needle has been used.
• The foot is not attached correctly.
• The needle is damaged.
• The needle is not inserted correctly.
• Wrong needle size for the fabric.
• The machine is not threated correctly.
• The bobbin case is not correctly threated.
• Needle/fabric/thread combination is wrong.
• Thread tension wrong.
• The needle is too large for fabric.
• The stitch length is wrongly adjusted.
• The thread tension is too tight.
Correction
• Rethread the machine.
• Reduce the thread tension (lower number).
• Select a larger needle.
• Remove and reinsert the needle
(flat side towards the back).
• Remove the bobbin and rewind the bobbin.
• Replace the needle.
• Check the threading carefully.
• Adjust the upper thread tension.
• Remove and reinsert needle (flat side towards the back).
• Insert a new needle.
• Choose a needle to suit the the thread and fabric.
• Check and attach correctly.
• Insert a new needle.
• Insert the needle correctly (flat side towards the back).
• Choose a needle to suit the thread and fabric.
• Check and attach correctly
• Check the threading.
• Thread the bobbin case as illustraded.
• The needle size must suit the fabric and thread.
• Correct the thread tension.
• Select a finer needle.
• Readjust the stitch length.
• Loosen the thread tension.