Position the spool so that the thread winds clockwise around it. Pass the thread around the bobbin winding tension disc on top of the machine.
The thread should pass through the hole from the inside. The tail of the thread should end up on the outside of the bobbin. Only pass the thread through the upper hole. Do not pass it through the bottom hole.
Use your hands to gently twist the bobbin clockwise. After a slight rotation, you should see the spring on the bobbin winding shaft click into the slit along the side of the bobbin.
Hold the tail end of the thread with one hand as you do this. Take your foot off the controller and stop the machine after the thread is partially wrapped around the bobbin. Do not wait until the bobbin is full before releasing the controller. On some machines, you can wind a bobbin while your sewing to make the most of your time.
The machine should stop on its own once the bobbin is completely full. Do not touch the balance wheel as the bobbin winds. The wheel will turn during this time, and you should not disturb or attempt to stop it.
Push the bobbin winding shaft back to the left and lift the full bobbin off. Note that if the bobbin is wound improperly, the thread tension could loosen as you sew and break the needle. The thread on the finished bobbin should look tight and even. This step completes the bobbin winding portion of the process.
Raise the presser foot lifter to lift the presser foot, as well.
The shuttle cover is located along the front side of the machine, beneath the needle and behind the extension table.
Unwind about 4 inches (10 cm) of thread from the bobbin before attempting to insert it into the case. Hold the bobbin case so that the latch points down and toward you. The thread should be directed toward the top of the bobbin case as you slip the bobbin inside. When viewed from the front, the thread should appear to wind around the bobbin in a clockwise rotation. If the bobbin is loaded in the wrong direction, the thread tension will be incorrect and you may end up breaking the machine needle as you attempt to sew.
The delivery eye is located just beneath the tension spring of the case.
You will need to make sure that your index finger lines up with the top opening of the shuttle race as you push the bobbin case inside. A properly loaded bobbin case should snap into the machine. It will fall out if placed improperly or insecurely.
Only pay attention to the position of this lever; do not worry about the position of the needle. This lever will be positioned above the needle and should have a small notch in it.
Position the spool so that the thread appears to wrap around it in a counterclockwise rotation.
The rear thread guide is directly next to the bobbin tension disc. Simply slip the thread into the gap of the guide. The front thread guide is a small notch directly in front of the rear guide. Slide the thread through that notch. Note that there should be a diagram on the top of the machine to help guide you as you thread the needle.
At the bottom of the right channel, wrap the thread around the upper tension control dial. The thread should pass from right to left, picking up the thread check spring and slipping into the thread tension discs behind the dial. Grab the thread on both sides of the tension dial. Gently tug on both sides to make sure that the thread is firmly in place.
Pull the thread through the eyelet, moving from right to left. After successfully trapping the thread inside the eyelet, draw the thread back down through the left channel again.
Once the thread is successfully inserted through the needle, pull out a tail roughly 2 inches (5 cm) long. Position this tail behind the needle, pointing toward the back of the machine.
To raise the presser foot, simply lift up the presser foot lever/lifter. To raise the needle, turn the balance wheel on the right side of the machine counterclockwise, toward yourself, until the needle sits in its highest position.
Hold the tail of the upper thread as you do this. Keep the thread taut, but do not put pressure on the needle. Note that needle must be threaded and the bobbin must be loaded during this process. During this rotation, the upper thread should catch the lower bobbin thread in a loop.
This extra loop of thread comes from the bobbin. Once you can grab the loop, pull it out into a straight tail. If you cannot grab it with your fingers, use a small screwdriver, pencil, or similar object to draw the loop out.
Make sure that the upper thread passes in between the “toes” of the presser foot. With the completion of this step, the Brother LS 2125i sewing machine is fully threaded and ready to use.
