Check for the following matters.

• Probable cause

  The threading on the machine is improper.

   

  Remedy

  Make sure that the threads are passed into the machine properly.
  Rethread the threads to the machine in an appropriate procedure.

   

  Refer to the detailed instructions to learn the threading procedure.

  Instructions for threading the machine.

  You can also see the instructions for threading on movie.

  Video instructions for threading.

• Probable cause

  The needle was bent, or the tip of needle was blunt or broken.

   

  Remedy

  Replace with a new needle.

• Probable cause

  Needle is installed incorrectly.

   

  Remedy

  Reinstall needles correctly.
  Make sure that the needle is installed until it touches the needle stopper.

  

  Refer to the instructions to learn how to replace the needles.

  Instructions for removing and installing the needle

• Probable cause

  Wrong needle is used.

   

  Remedy

  Use a standard home sewing machine needle. The recommended needle is Schmetz 130/705H (90 / #14).

• Probable cause

  The material was pulled forcibly.

   

  Remedy

  Do not press or pull material too hard when sewing.