Journal
CIRP ANNALS-MANUFACTURING TECHNOLOGY
Volume 72, Issue 1, Pages 317-320Publisher
ELSEVIER
DOI: 10.1016/j.cirp.2023.04.070
Keywords
Computer numerical control (CNC); Feed; Trajectory generation
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This paper presents a real-time trajectory generator that uses a dynamic command scaling approach to generate trajectories in real-time, fully utilizing the stroke, velocity, acceleration, and dynamic limits of the dual-stage drives, enabling coordinated high-speed dual-stage contouring motion to be realized.
Machine tools are designed using dual-stage feed drives with slow and fast stages when speed and accuracy must be delivered over large work-volume. The slow stage provides large-stroke positioning whereas the fast stage executes short-stroke accurate tool-tip placement. This paper presents a real-time trajectory generator (governor) that distributes reference motion commands so that coordinated high-speed dual-stage contouring motion can be realized. A novel dynamic command scaling (DCS) approach is developed to generate trajectories in real-time that fully utilize the stroke (range), velocity, acceleration and dynamic limits of the dual-stages drives. Demonstration in 2D laser patterning shows > 2 times increase in productivity.
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