What letter shape is formed when threading the tension and thread controller assemblies on a sewing machine?

The threading of the tension and thread controller assemblies on a sewing machine is designed to create an "S" shaped path. This shape allows the thread to be guided smoothly through the various components of the sewing machine, ensuring consistent tension and proper feeding of the thread. The "S" shape helps in managing the thread's tension effectively as it travels through different guiding mechanisms, preventing unnecessary strain or slack in the thread. Additionally, this specific threading method is crucial for achieving optimal stitching quality and preventing issues during sewing operations. Understanding this threading shape is essential for anyone working with sewing machines, as it plays a significant role in the performance and reliability of the equipment.