What is the proper method for final threading of a bobbin on a sewing machine?

The proper method for final threading of a bobbin on a sewing machine is to pull the thread under the tension spring and into the delivery eye. This technique is essential because it ensures that the thread is correctly tensioned, which is crucial for even stitching and to prevent thread jams or breakage while sewing.

When the thread is pulled under the tension spring, it engages with the tension mechanism of the sewing machine, allowing for precise control over the amount of thread released during operation. This regulation aids in achieving consistent stitches, as proper tension is a key component to sewing effectively. Ensuring that the thread sits securely in the delivery eye also facilitates smooth feeding of the thread as it moves through the sewing machine, leading to better performance and output quality.

Other methods, such as wrapping the thread around the tension spring or inserting it directly into the bobbin without adjustment, do not provide the necessary tension or control. These alternatives could potentially lead to complications during sewing, such as uneven stitching, skipped stitches, or thread breakage, which can detract from the overall quality of the project being worked on.