This research carries out the dynamic analysis of light and semi-light automotive convergence diagnostic equipment, with a gross weight of up to three tons. A comparative analysis of the implications and consequences due to positive, negative, and neutral convergences is carried out. Then the different mechanical and electronic design characteristics of the device to determine the convergence in the tires. The design of the equipment has three stages: mechanical, electrical, and electronic. The mechanical stage comprises the structure of the equipment, the electrical stage consisting of the design and construction of a longitudinal motion sensor, The electronic stage formed by a microcontroller which, once the microprocessor has been programmed, performs the measurement process based on the variables: relative displacement and potential difference. The elements designed and built are integrated into the equipment, which through a test protocol was evaluated both in empty and under load.