Research on high-speed and high-precision laser processing algorithm based on macro-micro platform

Aiming at the problem that XY motion platform cannot realize high-speed and high-precision machining simultaneously, a high-speed and high-precision laser processing algorithm is proposed based on the macro-micro structure of laser cutter with a laser galvanometer scanner. The velocity planning of macro platform and composite motion is carried out by applying finite impulse response (FIR) filters three times, and velocity planning of micro platform is obtained by vector subtraction method. The motion decomposition of the macro-micro platform is realized accurately. The macro platform is responsible for large-format movement, and the micro platform is responsible for fast-speed turning. Velocity overlap of adjacent segments is employed to improve the machining efficiency. The constraints are established to determine the overlapping time, so that the algorithm can realize high-speed machining without introducing contour error, and ensure that the velocity, acceleration, and jerk of the macro platform can be processed within the limit range. Experiment and simulation analysis show that compared with using only the XY platform, the total machining time of using the macro-micro platform with the algorithm proposed in this paper is reduced by more than 35%.