Troubleshooting - Hema SM-6000HU Instrucciones De Uso

Trouble shooting
Problem Cause
Upper
• The machine is not
thread
breaks
• The thread tension is
• The thread is too thick
• The needle is not
• The thread is round
• The needle is dam-
Lower
• The lower thread is not
thread
breaks.
• The upper thread ten-
Skipped
• The needlenis not
stitches
• The needle is dam-
• The wrong size needle
• The foot is not at-
Needle
• The needle is dam-
breaks
• The needle is not
• Wrong needle size for
Loose
• The machine is not
stitches
• The bobbin case is not
• Needle/fabric/thread
• Thread tension wrong.
Seams
• The needle is too large
pucker-
ing • The stitch length is
• The thread tension is
8
threaded correctly.
too tight
for the needle.
inserted correctly.
wound the spool pin.
aged.
inserted correctly.
sion is too loose.
inserted correctly.
aged.
has been used.
tached correctly.
aged.
inserted correctly.
the fabric.
threated correctly.
correctly threated.
combination is wrong.
for fabric.
wrongly adjusted.
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.