The article deals with the ongoing development of the universal rotary module URM 02. The high weight of the components from which the modules are assembled proved to be a significant problem. As well as the weight of the connecting parts that are needed to assemble the manipulator or robotic arm. Design changes have resulted in a reduction in weight compared to older generations of modules, but in order for the manipulator to function properly, further weight reduction is required. The article describes the procedure for lightening components by changing the material and the design changes that result from it. The original aluminium alloy was replaced by a continuous carbon fibres composite produced using CFR (Continuous Fiber Reinforcement) additive technology. Here you should describe the paper idea in short.