Symptom / Cause

• The thread becomes tangled on the lower side of the fabric.
  
• After starting sewing, a rattling noise is made and sewing cannot continue.
• Looking under the fabric, there is tangled thread in the bobbin case.
  

If the upper thread is incorrectly threaded, the upper thread passed through the fabric cannot be firmly pulled up and the upper thread becomes tangled in the bobbin case, causing a rattling noise.

Remedy / Check details

Remove the tangled thread, and correct  the upper threading according to the following procedure.

1. Turn off the sewing machine.
2. Remove the tangled thread. If it cannot be removed, cut the thread with scissors.
   
3. If the threads remain in the bobbin case, remove the needle plate cover, and then remove the threads.
   

   If the bobbin was removed from the bobbin case,  install the bobbin in the bobbin case correctly. Refer to "How do I correctly install a bobbin?"

4. Remove the upper thread from the machine.
5. Turn on the sewing machine.
6. Raise the presser foot using the presser foot lever.
   

   (1) Presser foot lever

   If the presser foot is not raised, the sewing machine cannot be threaded correctly.

7. Press   (needle position button) once or twice to raise the needle.
   

   (1) Needle position button

   The needle is at the correct height when the mark on the handwheel is at the top, as shown below. Check the handwheel and, if this mark is not at this position, press  (needle position button) until it is.

   (1) Mark on handwheel

8. Turn off the sewing machine.
9. While holding the spool with your right hand, pull the thread with your left hand, and then pass the thread under the thread guide.
   

   (1) Thread guide

10. Pass the thread under the thread guide cover from the back to the front. Hold the thread with your right hand so that there is no slack in the thread that is pulled out, and then pass the thread under the thread guide cover with your left hand.

    (1) Thread guide cover (2) Thread guide spring (3) Thread (4) When the presser foot lever is lowered

    • When passing the thread behind the thread guide cover, be sure to use both hands. If you do not hold the thread with your right hand, the thread will be loose and you will not be able to secure the thread in the thread spring guide. It may cause incorrect thread tension.
    • Make sure that the presser foot lever is raised before passing the thread behind the thread guide cover. If the presser foot lever is lowered, the thread guide spring is shut and you cannot hang the thread on the thread guide spring correctly.
11. Thread the machine by guiding the thread along the path indicated by the number on the machine.
    

12. Make sure that the thread is passed into the thread take-up lever from the right to the left.

    (1) Thread take-up lever

    If the needle is not raised, you cannot pass the thread into the thread take-up lever. Be sure to press the needle position button to raise the needle before passing the thread into the thread take-up lever.
13. Pass the thread behind the needle bar thread guide.
    The thread can easily be passed behind the needle bar thread guide by holding the thread in your left hand, and pulling the thread into the guide from right to left.

     

    (1) Needle bar thread guide

14. Lower the presser foot lever.
    

    (1) Presser foot lever

15. While lowering the needle threader lever, hook the thread onto the guide.
    

    (1) Press straight down the needle threader (2) Thread (3) Guide

16. Catch the thread on the hook as shown below.
    

    (1) Needle thread lever

17. Raise the needle threader lever, and then pull the end of the thread which passed through the eye of the needle.
    

    (1) Loop of the thread

     

    Be careful not to pull on the thread with force or it may bend the needle.

     

     

18. Raise the presser foot lever.
    

    (1) Presser foot lever

19. Pass the end of the thread through the presser foot, and then pull out about 5 cm (2 inches) of thread

    toward the rear of the machine.

    (1) 5 cm (2 inches)