This paper presents the design, implementation, and testing of an articulated arm system for 3D coordinate measurement, with applications in the field of biomedical engineering. The project was developed based on the idea of creating a simple, efficient, and accessible tool for evaluating the biomechanics of the human spine. Theoretical concepts related to spinal instability and the biomechanical parameters that influence ligament deformation and segmental motion were also addressed, along with the direct geometrical model described by the Denavit-Hartenberg robotic convention.