Slotted Core optical cable refers to an optical cable with a fiber skeleton as the core. The skeleton is usually a cylindrical body with grooves, which can be V-shaped, U-shaped, rectangular or fan-shaped. The grooves can be distributed along the cylindrical body in a spiral or SZ shape. The optical fibers inside the grooves can be split, strip or micro cluster fibers. Sloted Core optical cables require specialized equipment for manufacturing, and there are three types of cable forming machines: cage stranding, reel stranding, and SZ stranding. This section mainly introduces the common Sloted Core ribbon cable reel stranding machines.