A bobbin is a very important part of a sewing machine and winding it correctly can save you a lot of grief.

Quick video on winding a bobbin

Follow these steps

1

Start with an empty bobbin. Always wind the bobbin before threading the machine.

Follow these steps

2

Pass the thread from the spool through the thread guide and through the bobbin winding tension disk.

Next

3

Pass the thread end, from inside, through the small hole in the rim of the bobbin. Make sure the cut is clean and free of fibers.

Then

4

Secure the thread on the bobbin from unwinding, just wind a few layers of thread by hand covering the thread tail.

Then

5

Place the bobbin on the spool pin and cut the thread tail.

Then

6

Lock the bobbin winder and start the machine.

Even if threading a bobbin is a simple process something can go wrong

Check my detailed tutorial on how to thread a bobbin

If you cut the thread end when it’s not covered by a few layers of the thread it may unwind

Always make sure he thread is not going to unwind. Put a few layers of thread on the bobbin by hand or by sewing machine.

Many more solutions in the link below

You can use a separate bobbin winder to do the job!