http://roboticproject.net/Article_ControlSystemLaser1.html

The analysis of the Laser Drill system studied demonstrated the specific range for which the system is stable and functional. While specifically studying the system response to ramp and step functions inputs, it became clear through the analysis of Nyquist, Root-Locus, and Bode plots that the system only became stable with the ramp input at K ranging from 0 to 13.333. All other inputs above K=13.333 for ramp, and all step function inputs, set the system to an unstable status. The calculations obtained throughout the analysis, such as the graphs and values, were gathered by utilizing a mathematical computer tool called Matlab