Prepare the bobbin and the spool of bobbin thread. Use cotton or spun polyester bobbin thread (from 74 dtex/2 to 100 dtex/2).

1. Align the groove in the bobbin with the spring on the bobbin winder shaft, and set the bobbin on the shaft.

   (1) Groove in the bobbin (2) Spring on the shaft

    

2. Set the thread spool on the spool pin.

   (1) Thread spool (2) Spool pin

   When using a small spool, remove the spool cushion and set the spool directly onto the spool pin. Also use the included spool cap to keep the small spool stable.

    

3. Pass the thread through the hole in the left of the thread guide toward the front of the winder.

   (1) Hole in the thread guide

4. Pass the thread around the tension disc as shown in the illustration. Make sure that the thread is correctly fed into the tension disc.

   (1) Tension disc

5. Pass the thread through the hole in the right of the thread guide toward the back of the machine.

   (1) Hole in the thread guide

6. Wind the thread clockwise around the bobbin 4 or 5 times, as shown in the illustration.
   
   

    

7. Pass the end of the thread through the guide slit in the bobbin winder seat, and pull the thread. The cutter will cut the thread.

   (1) Guide slit (2) Bobbin winder seat

   Be sure to follow the procedure described. If the bobbin is wound without the thread being cut with the cutter, when the bobbin thread runs low, the thread may become tangled around the bobbin and cause the needle to break.

    

8. Slide the bobbin holder, until it clicks into place.

   (1) Bobbin holder

9. Press the main power switch to start winding the bobbin.
   
   
   → Start winding the bobbin.


10. The bobbin will stop rotating automatically when it is done winding, and the bobbin holder will return to its original position.
     

    

11. Remove the bobbin.
    
    

    When removing the bobbin, do not pull on the bobbin winder seat. Doing so could loosen or remove the bobbin winder seat, resulting in damage to the bobbin winder.

     

12. Pull the thread through the guide slit in the bobbin winder seat to cut the thread with the cutter.
    
    
    • Check that the bobbin thread has been wound correctly, otherwise the needle may break or the thread tension will be incorrect.
      
      
       
    • Be sure to clean the bobbin case each time that the bobbin is changed. Thread wax and dust easily collect around the hole in the tension-adjusting spring on the bobbin case, resulting in an incorrect thread tension. For details, refer to "Maintenance (Cleaning the bobbin case)".
       
    • Be sure to check the tension of the bobbin thread each time that the bobbin is changed.
       
    • Depending on the bobbin thread type, the tension of the bobbin thread may differ. Be sure to check the tension of the bobbin thread and adjust the tension if necessary. For a metal bobbin, use both weights, large (L) and small (S). For details, refer to "How do I adjust the tension of the bobbin thread ?".

      (1) Weight (L) (Part Code: XC5974-151) (2) Weight (S) (Part Code: XC6631-051)

If bobbin winding is stopped before it is finished:

The bobbin winder stops automatically if the thread does not feed, for example, if it becomes tangled on the spool pin. If this occurs, correctly thread the bobbin winder, and then wind the bobbin correctly.