Laser scanning is widely used on 3D coordinates measuring systems, this paper focuses on some of the principal sources of uncertainties that exist on the implementation of a Laser Scanner based on dynamic triangulation and mainly on its passive element. By analyzing the processed signal on different environmental conditions and the issues by the instability of driving of a brushed DC motor, it is proposed the closed-loop control scheme to reduce these performance issues and further experimentation to demonstrate the results obtained with the proposed method.