The Brother VX-1120 is a relatively basic and unfussy sewing machine. The threading method is simple, although if you just purchased your first sewing machine and are attempting to thread it for the first time, it may not seem that way. After learning the three steps involved in threading the machine -- winding the bobbin, threading the bottom thread and threading the upper thread -- and practicing a few times, you will find that the task becomes a very quick one.
Place a spool of thread over the spool pin, which is a vertical spoke located at the back-right of the top of the sewing machine.
Take the end of the thread from the spool and carry it left along the top of the machine and around the bobbin winding tension disc, which resembles a small button.
Pass the end of the thread through the small hole in the side of an empty bobbin, threading from the inside. Push the bobbin down onto the bobbin winding shaft, which is a small metal spoke at the front-right of the top of the sewing machine.
Click the bobbin over to the right, then manually twist it in a clockwise direction until you hear the spring on the bobbin shaft click into place.
While pinching the end of the thread that is coming out of the hole in the side of the bobbin, slowly press your foot down on the foot controller so that the thread from the spool winds around the bobbin. Let go of the thread end and continue pressing until the machine stops automatically, which means the bobbin is full, or when the bobbin has as much thread as you need for your project.
Cut the thread connecting the bobbin and the spool, and trim the thread end coming out of the hole in the side of the bobbin. Click the bobbin over to the left and remove it from the bobbin shaft.
Turn the balance wheel (the disc at the top of the right side of the sewing machine) toward you to raise the needle to its highest point. Lift the presser foot with the lever located behind the needle shaft. Remove the extension table, if it is attached.
Open the shuttle cover, a small door located on the front of the sewing machine, underneath the needle. Remove the bobbin case, which you see held in the centre of the shuttle race, by pulling the hinged latch on the front of it.
Pull about 4 inches of thread from the bobbin and press the bobbin into the bobbin case so that it will turn clockwise when you pull on the thread end. Slide the thread into the slot on the side of the bobbin case, over the tiny tension spring and into the delivery eye.
Hold the bobbin case by its latch so that the metal finger is pointing upward. Press the bobbin case -- with the bobbin inside -- into the shuttle race. The metal finger should fit into a vertical notch at the top of the shuttle race, and the bobbin case should be held securely in place.
Close the shuttle cover.
Rotate the balance wheel toward you until you see the take-up lever raised to its highest position. The take-up lever has a metal loop at the end of a narrow spoke, and it will emerge from the top of the thread guide, the vertical slit at the front of the machine above the needle.
Take the end of the thread from the spool and take it left along the top of the sewing machine, around the rear thread guide, then toward yourself and around the front thread guide.
Take the thread down the front of the machine and from right to left around the tension control dial, which is the round knob to the right of the needle. Pull the end of the thread so that the part that passes around the tension control dial is taut and flush with the front of the machine. You should feel the thread slip between the two tension discs.
Carry the end of the thread upward from the tension control dial and through the eyelet at the end of the take-up lever. Bring the thread downward and hook it behind the thread guide, which is a small wire loop at the top of the needle. Insert the thread end through the eye of the needle from front to back.
Pull a tail of about 4 inches through the needle and pinch the end of it with your left fingers. Turn the balance wheel toward you with your right hand until you see the needle lower through the needle plate then rise back up again. You should see the lower thread looped around the upper thread. Untangle it and pull both thread ends until they have approximately 6-inch long tails.
If you have lost the original instruction manual that came with your Brother VX-1120 sewing machine, you can download one for free at the Brother website.