JA1450NT

FAQs & Troubleshooting

JA1450NT

Date: 17/11/2015 ID: faqh00000580_002

How do I install the bobbin wound with thread? (For models equipped with a quick-set bobbin)

Make sure you turn off the machine while threading. If you accidentally step on the foot controller and the machine starts to sew, you could be injured.

Prepare the bobbin wound properly before threading the lower thread.

Not winding the bobbin properly may cause the thread tension to loosen, and may break the needle.
Turn off the machine.
Raise the presser foot lever.

(1) Presser foot lever
Raise the needle by turning the handwheel toward you (counterclockwise).

(1) Mark on the handwheel
Remove the bobbin cover by sliding it and lift toward you.

(1) Bobbin cover
Put the bobbin in so the thread comes out in the direction shown by the arrow.

Make sure you set the bobbin so the thread unrolls in the right direction. If the thread unrolls in the wrong direction, it may cause the thread tension to be incorrect or break the needle.
Lightly hold down the bobbin with your right hand as shown (A), guide the thread through the slit (B).

(1) Slit

Make sure you set the bobbin so the thread unrolls in the right direction. If the thread unrolls in the wrong direction, it may cause the thread tension to be incorrect or break the needle.
While lightly holding down the bobbin with your right hand (A), guide the thread through the slit (B) and lightly pull it with your left hand (C).
While lightly holding down the bobbin with your right hand (A), continue guiding the thread through the slit with your left hand (B) Then, cut the thread with the cutter (C).

If the thread is not correctly inserted through the tension-adjusting spring of the bobbin case, it may cause incorrect thread tension.

(1) Tension-adjusting spring
Replace the bobbin cover. Put the projection into the bobbin race retainer groove and push closed.

(1) Groove
(2) Projection

Start sewing after threading the lower and upper thread. When sewing gathers or darts, you can draw up the lower thread by hand so that some thread will be left over. Refer to “How do I draw up the lower thread?”.