Chain Looper for Overlock Sewing Machine

"chain looper" is often used to refer to the lower looper, which is responsible for creating the chain stitch in the overlock stitch formation. The lower looper carries the lower thread and forms loops that interlock with the upper thread to create the characteristic chain stitch. Here's how the lower looper (or chain looper) functions in an overlock machine:

Thread Path: The lower looper (chain looper) has its own designated thread path that guides the thread from the thread spool to the looper mechanism. The specific threading path may vary depending on the machine model, so it's important to consult your machine's manual for accurate threading instructions.

Tension Adjustment: The lower looper thread (chain thread) has its own tension adjustment mechanism. Proper tension adjustment is essential to ensure that the lower looper thread is neither too loose nor too tight, resulting in well-balanced and secure stitches.

Loop Formation: As the fabric is fed through the overlock machine, the lower looper (chain looper) moves in synchronization with the upper looper and needles. The lower looper carries the lower thread and forms loops that interlock with the upper thread to create the chain stitch.

Stitch Formation: The lower looper (chain looper) thread passes under the fabric, along with the upper thread. The needles penetrate the fabric, creating two parallel rows of stitches, while the lower looper's loops wrap around the fabric's edge, creating the chain stitch. This combination of stitches and loops provides a secure and finished look to the fabric's edge.

Thread Tension: The tension adjustment for the lower looper (chain looper) thread ensures that it is properly tensioned for smooth and even stitch formation. Correct tension is crucial for achieving optimal stitch quality and preventing issues such as loose or puckered stitches.

Maintenance: Regular maintenance, including cleaning and lubrication, is important for the smooth operation of the lower looper (chain looper) and the overall machine. Clean the machine, including the lower looper area, regularly to remove lint, dust, and thread build-up that may affect stitch quality or machine performance.

Proper threading, tension adjustment, and maintenance of the lower looper (chain looper) are essential for achieving high-quality overlock stitches and optimal machine performance. Always refer to your machine's manual for specific instructions on threading and adjusting the lower looper, as different machine models may have slight variations in their threading and tension mechanisms.