Real-time smooth trajectory generation for 3-axis blending tool-paths based on FIR filtering

Three-axis machining tool-paths are generated using computer-aided manufacturing (CAM) systems and programmed by a series of G01 codes mixed with long short segments. The computer numerical control (CNC) system needs to analyze path information according the G-codes through smoothing, speed planning, interpolation process; generate smooth trajectory; ensure high-order continuity velocity. This study proposes real-time trajectory generation algorithm simple structure low calculation for 3-axis blending tool-paths. Finite impulse response filters used bounded acceleration in real-time. Due delayed filter, it will inevitably bring contour error. feed rate is adjusted considering influence adjacent segments on error case idea then extended continuous micro-segments. Finally, direct one-step realized pre-discretization certain rules. can effectively but also suitable Consequently, effectiveness proposed algorithms validated simulations experimented 5-axis machine tool.