DSP控制卡在高速数控雕铣机中的研究实现

Research and Realization on DSP Based Control Card Applied to High-speed CNC Engraving and Milling Machine

分析了传统数控雕铣机运动控制系统的缺陷,针对基于DSP+FPGA运动控制卡的特点,开发了一种高速度、高精度、高效率和高可靠性的数控雕铣机运动控制系统。同时将伺服驱动脉冲发生模块、码盘反馈信号处理模块、插补命令FIFO缓冲区、辅助命令FIFO缓冲区、状态缓冲区、DSP外部扩展存储区都集成在一块FPGA芯片上,这样大大地减少了外围电路的设计工作量,并增强了系统的可靠性和稳定性。该系统已成功应用于8.5kW四轴数控雕铣机控制系统中,并且应用效果达到了设计目标。

This paper analyzes defects in motion control system that applied to additional CNC Engraving and Milling machine.A kind of high-speed,high-pricision,high-effective and high-reliability motion control system is developed aimed at the characteristics of motion control card based on DSP＋FPGA.At the same time 6 modular function blocks are all integrated in one FPGA.The load of design peripheral circuit is reduced much more,and it makes the system more reliable and steady.The system is successfully used into 4-axis CNC Engraving and Milling machine.It is proved that this card is able to satisfy requires of motion control.