Symptom

• The thread becomes tangled on the wrong 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.

Cause

Incorrect upper threading

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 then correct the upper threading.
 

Removing the tangled thread

1. Turn off the sewing machine.
    
2. Remove the tangled thread. If it cannot be removed, cut the thread with scissors.

   For details, refer to “How do I clean the race?”.

3. If the threads remain under the needle plate, remove the needle plate, and then remove the threads.
    
4. Raise the presser foot lever to raise the presser foot.
    
5. Remove the upper thread from the machine.
    
6. If the needle plate and the bobbin case were removed from the machine, correctly install the bobbin case and attach the needle plate.

   For details, refer to “How do I clean the race?”.

7. If the bobbin was removed from the bobbin case, correctly install the bobbin.

   For details, refer to "How do I install the bobbin wound with thread?”.

Threading the upper thread

[1] Preparing for threading

1. Turn off the sewing machine.
    
2. Raise the presser foot lever to raise the presser foot.


3. Raise the needle to its highest position by turning the handwheel toward you (counterclockwise).
   
   (1) Turn toward you so that this mark points up to the highest position.

   Be sure that the presser foot is raise and the needle is correctly raised. If the operation is not performed properly, it may cause troubles during sewing and poor sewing results.

[2] Threading the upper thread

1. Correctly set the spool of thread to the spool pin.
   
   * Make sure that the thread unwinds as shown.
    
2. While holding the thread from the spool with your right hand, pass the thread toward you, in the groove on the thread guide.

   (1) Thread guide (2) Spring

   
   * Make sure that the spring in the groove catches the thread.


3. Feed the upper thread as shown in the following illustration.

   (1) Thread take-up lever

   
   * Make sure you guide the thread through the thread take-up lever from right to left as shown in the following illustration.


4. Slide the thread behind the needle bar thread guide.

   (1) Needle bar thread guide

[3] Threading the needle

1. Lower the presser foot lever.
   


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


3. Push back the needle threader lever until it stops  , and pass the thread in front of the needle. Make sure that the thread is under the hook that has come through the eye of the needle and the hook catches the thread  .
   


4. Return the needle threader lever to the front slowly  , and then release the lever slowly.
   


5. Carefully pull the loop of the thread through the eye of the needle to pull out the end of the thread.
   


6. Raise the presser foot lever.
   


7. Pass the end of the thread through and under the presser foot, and then pull out about 10 cm (approx. 4 inches) of thread toward the rear of the machine.

   (1) 10 cm (4 inches)