NC system fine interpolator and control method thereof based on SOPC

Abstract

The invention relates to a NC system fine interpolator and a control method thereof based on SOPC; the fine interpolator is based on the FPGA structure, a processor is connected with a fine interpolation module, a tri-state bridge, a dual-port RAM, a DMA module, a timer module and a chip-interior ROM; wherein, the fine interpolation module is used for receiving the control signal of the processor and is controlled by the processor to output a fine interpolation pulse signal according to the thick interpolation command transmitted by the dual-port RAM; the processor is connected with a FLASH and SRAM on the exterior of the FPGA through the tri-state bridge; the dual-port RAM is connected with the microprocessor of an upper computer through a PCI interface module; the timer module outputs base frequency to the fine interpolation module for generating pulse signals; the DMA module copies the fine interpolation control program stored in the FLASH to the internal memory of the processor' and the internal switching bus module provides internal connection bus for each module. The invention adopts the FPGA-based on-chip system design to improve the confidentiality and integration of the fine interpolator, the processing stability and speed of the fine interpolator, and reduce the data throughput of the upper computer.

Description

technical field [0001] The invention relates to a computer numerical control system interpolation control device, in particular to a numerical control system fine interpolator based on an on-chip programmable system and a control method thereof. Background technique [0002] The interpolation module is one of the most important functional modules in the entire CNC system, and its operation speed directly affects the speed, precision and processing capability of the system. The interpolation algorithm in the NC closed-loop control system adopts the data sampling interpolation algorithm, that is, the entire interpolation process is divided into two stages: rough interpolation and fine interpolation, and the communication rate between rough interpolation and fine interpolation and The speed of fine interpolation calculation affects the speed and processing capacity of the entire CNC system. [0003] At present, a large number of high-speed fine interpolators in the industry ar...

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Problems solved by technology

[0005] Aiming at the problems that the fine interpolators in the prior art mostly use microprocessors or microcontrollers, software and hardware resources cannot be allocated reasonably, and the interface rate has bottlenecks, etc., the technical problem to be solved by the present invention is to provide a NC system fine interpolator based on on-chip programmable system and its control method for rationally allocating software and hardware resources and solving bottleneck problems

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