Analysis of the Table Motion of a 3-Axis CNC Milling Machine Tool at Start-up and Braking

The main goal of the paper was to analyze the table motion of a 3-axis CNC milling machine tool. The analysis involved measuring the velocity, acceleration and delay as well as the distance and time associated with the machine motion during idling. The measurements were made with a laser interferometer and an ultrahigh-speed digital camera. A comparative analysis of the motion parameters results obtained by various measuring methods is made. The accuracies of displacement, velocity and acceleration differ depending on the employed measuring system. The stabilization of velocity and acceleration (delay) parameters requires time depending on the defined feed rate. An increase in the set feed rate leads to a decrease in the amplitude of velocity and acceleration (it has a positive effect on the values of the tested parameters). The knowledge of machine tool dynamic characteristics, i.e. acceleration, velocity, vibration, positioning time, resonance and damping, is of vital practical importance in many applications. The experiments are described, and obtained results are discussed and presented in the form of plots and tables.