8
Trouble shooting
Problem
Cause
Correction
Upper
thread
breaks
• 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 dam-
aged.
• 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.
Lower
thread
breaks.
• The lower thread is not
inserted correctly.
• The upper thread ten-
sion is too loose.
• Check the threading carefully.
• Adjust the upper thread tension.
Skipped
stitches
• The needlenis not
inserted correctly.
• The needle is dam-
aged.
• The wrong size needle
has been used.
• The foot is not at-
tached correctly.
• 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.
Needle
breaks
• The needle is dam-
aged.
• The needle is not
inserted correctly.
• Wrong needle size for
the fabric.
• 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
Loose
stitches
• The machine is not
threated correctly.
• The bobbin case is not
correctly threated.
• Needle/fabric/thread
combination is wrong.
• Thread tension wrong.
• Check the threading.
• Thread the bobbin case as illustraded.
• The needle size must suit the fabric
and thread.
• Correct the thread tension.
Seams
pucker-
ing
• The needle is too large
for fabric.
• The stitch length is
wrongly adjusted.
• The thread tension is
too tight.
• Select a finer needle.
• Readjust the stitch length.
• Loosen the thread tension.
