The driving of electrical pulse signals in parallel to CNC axis movement using the position unit vector are crucial under CNC movement vector. The combination movement of the machine axis in x and y direction represents by parametric interpolator curve. This study has completed the infrastructure for a working parametric interpolator program. Chord error affects the precision and quality of the machined part and the parallel look-ahead strategy counter sharp corners issues which the precision performance improvement is the main objective of the study. The constraints of motor speed and chord error of the CNC driving motors was considered. The algorithm strategy maintains the chord error tolerance, throughout the traversal of the tool along the parametric path. The parametric curve, plots of the curve and its various features were examined. The gnu plot software application was used to represent various parametric curve variables. This report utilizes 2D, 3D and polar plots for data analyses. The interpolator run results are stored as text files for analyses and correctness checks. The evaluation was iterated for the whole cycle in the loop and are in good agreement of result.