Expandable and cuttable multi-shaft movement control system

Abstract

The invention provides an expandable and cuttable multi-shaft movement control system, which includes a CPU core system board, an FPGA base board, and a fieldbus servo communication board; the CPU core system board and the fieldbus servo communication board are connected with the FPGA base board through a unified bus slot; an FPGA chip on the FPGA base board is connected with an upper computer through a serial bus; the FPGA base board provides multi-shaft pulse type servo drive slots connected with a servo drive system; and the fieldbus servo communication board is connected with a fieldbus, and transmits a movement control order to a bus type servo drive system through the fieldbus. The CPU special processing chip in the invention can select different CPU modules according to actual requirement and function, the fieldbus servo communication board also can be particularly selected according to the actual bus type of the servo drive system, and the multi-shaft movement control order can be transmitted to the servo drive system in the forms of pulse signals and fieldbus protocol signals, so that the expansion and the cut of the number of control shafts can become more convenient.

Description

technical field [0001] The invention relates to the technical field of numerical control, in particular to an expandable and tailorable multi-axis motion control system and method. Background technique [0002] At present, advanced manufacturing equipment such as CNC machine tools, industrial robots, three-coordinate measuring machines and special CNC equipment are developing extremely rapidly, and the intelligent motion control system of these equipment has become a key factor in the realization of their performance and functions. For example, the multi-axis motion control system has been widely used in automation equipment, especially in the field of automatic control of machine tools, light industrial packaging machinery, printing machinery and special CNC processing equipment. [0003] At present, the hardware structure of most motion control systems is relatively fixed. Generally, the CPU, FPGA and servo communication modules are integrated on one circuit board. Modules...

AI Technical Summary

Problems solved by technology

[0005] (a) The main problem of the analog signal transmission form is that it is difficult to eliminate the influence of zero drift and temperature drift on the accuracy, and it is easy to be affected by external interference; the main problem of the pulse signal transmission form is that the motion control system and the servo drive system are connected by a non-coding method If the command pulse signal is directly transmitted, once the pulse is lost or the interference pulse is introduced, it is difficult to check and correct the error, and it is difficult to ensure the high reliability of information transmission; in addition, the pulse-driven servo drive system has a limited maximum frequency of receiving pulses.

Therefore, in traditional motion control, the transmission form of the above-mentioned servo drive signal seriously limits the improvement of system performance and reliability.

[0006] (b) Due to the servo drive with pulse signal or analog signal transmission, each control axis must perform digital / pulse or digital / analog conversion calculations. Therefore, each control axis of the motion control system needs to provide a set of complex interface circuits And programs, after the hardware of the motion control system is fixed, the number of control axes is relatively fixed. Therefore, the use of pulse signals or analog signals to transmit servo signals is not conducive to the expansion and reduction of the number of control axes

From another point of view, because each control axis needs to provide a set of complex interface circuits and programs, the more the number of axes, the more interface circuits for digital / pulse or digital / analog conversion, and the more physical connections. more, the more complex the hardware structure of the control system, the higher the probability of errors, and the greater the program calculation load, which is not conducive to the improvement of system reliability and speed, and is not conducive to the expansion and tailoring of system performance.

[0007] In addition, due to the fact that the current fieldbus standards are not uniform, the interface types, data formats and communication protocols of the fieldbus are numerous, which makes it difficult for the motion control system to support the fieldbus. Most of the existing motion control systems that support the fieldbus only It can support one bus standard, which is not conducive to the expansion and tailoring of system performance

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