The weight of the energy chain itself and that of the built-in cables determine that the energy chain has a maximum unsupported length limit. Energy chains made of different materials have different maximum supported length limits. Generally, support wheels are added according to the environmental conditions. lf the equipment can have support wheels fixed on it, support wheels without support frames can be directly used, and the Energy Chain runs back and forth on the support wheels. lf the support wheels cannot be fixed on the equipment, support wheels with support frames can be used, with the support wheels fixed on the support frames. For the electromagnetic brake, the Energy Chain runs back and forth on the support wheels. lf the above two types of supports cannot be used due to environmental restrictions, for the safe operation methods of steel Energy Chain, the problem of the Energy Chain sagging can be solved by choosing the form of built-in stiffeners, such as in automatic painting equipment. Guide grooves can also be used. The guide groove consists of five parts: side guide walls of standard length, guide groove connecting angles, steel, installation screws, bottom grooves and sliding devices.