Thread transfers onto a bobbin so stitch colors will match. A stopper prevents over-filling.
To fill an empty bobbin with the color of choice, it must first be wound from a spool of thread. Most machines have a winder on top with two spooling pins, also called spindles. For these models, begin by first disengaging the clutch from the handwheel assembly so the pins will spin without the needle running up and down while the bobbin is winding.
The thread spool is placed on the feeding spindle. Pull the thread tip across and through the side of the empty bobbin with about 1/4 to 1/2 inch of thread fed through the bobbin's hole on top. Use a finger to hold the thread tip against the bobbin's top so it won't pull out as the bobbin is put on the receiving spindle. There will be a stopper next to the bobbin spindle to hold it in place, allowing it to spin until it is full. Slide the stopper over to meet the bobbin. Grasping the tip of the bobbin thread with the thumb and forefinger, gently press the sewing pedal. Both pins will spin and thread will travel from the thread spool to the bobbin.
After several revolutions, release the thread, allowing the machine to continue winding the bobbin. When it is full, slide the stopper over, cut the thread between the bobbin and the spool and remove the bobbin. Snip the thread tip from the top. Re-engage the handwheel clutch.
If the machine does not have automatic winding capabilities, see the owner's manual for instructions.
Bobbin holder inside shuttle.
Drop the bobbin in its holder if the machine has one, or straight into the shuttle, depending on the model. Feed the bobbin thread tip up through the plate and pull out a few inches. Once the machine needle on top has been threaded and proper tension settings are in place, sewing can begin.