Key Stages: Raw Material Input, Leveling, Slitting, Forming, Welding/Joining, Surface Treatment, Quality Control. Several essential components contribute to the efficiency and output of a cable tray production line. They serve as support structures for cables and wires in residential, industrial, and commercial settings. These include: Uncoilers, which handle the initial feeding of steel coils; Leveling. This video will show the complete process of manufacturing cable tray mesh using advanced welding machines. A cable tray making machine, also known as a cable tray roll former, is an automated machine that forms metal coil strips into cable tray sections through a series of progressive dies and bending operations.