DETERMINATION OF PHYSICAL PARAMETERS OF CNC MACHINES EXECUTION UNITS

V.V. Kombarov, E.A. Aksenov,E.A. Kryzhyvets

At high-speed machining accuracy of determination of motion parameters like position, speed and acceleration, influence errors of motion along contour. Investigations are carried out with aim of determination of accuracy required level for speed and acceleration data. It was revealed that position measurements with discreteness of 0.001 mm do not permit to obtain proper values of speed and acceleration. In order to determine speed it is necessary to provide position measurements with decimal digit position of 1·10^–5 …3·10^–6 mm, and for acceleration – 1·10^–5 …1·10^–6 mm, that is not possible to realize only at the expense of sensors discreteness increase. Development of algorithms for sensors signals recording device and algorithms of data processing for determination of speed and acceleration values with a required accuracy is proposed.

Key words: CNC, speed, acceleration, discreteness, encoder, measuring signal.