Abstract
The main purpose of this paper is to develop a new kind of PCI slave device serving as a motion controller for a biaxial motion control system. This kind of controller device is a new realization scheme of PCI devices, which is embedded with a deeply customized PCI interface block instead of traditional PCI interface chips, which will greatly promote the comprehensive performance of the device. Besides, we improved the popular and widely used DDA arc interpolation algorithm, promoting its performance in both accuracy and stability, and integrated it into our device, allowing the ability of the moving parts to move along nonlinear curve paths. Currently, this kind of controller device has been successfully applied on a surface mount machine which is also developed by our lab. As a result, the controller device performs well and is able to satisfy the requirement of accuracy and velocity of the surface mount machine. And its reliability and stability are also remarkable.
Highlights
Biaxial motion control system is a kind of electromechanical system widely used in various areas such as industrial manufacturing and commodity production [1]
The improved Digital differential analyser (DDA) algorithm is rewritten in Verilog HDL, and embedded in an FPGA device on board
The board works under the control of the microcontroller unit (MCU for short) and drives the motors with pulse signals produced by the DDA interpolation block or distributed by the upper system
Summary
Biaxial motion control system is a kind of electromechanical system widely used in various areas such as industrial manufacturing and commodity production [1]. In terms of board level design, traditional scheme usually includes microcontroller, FPGA, and an extra PCI interface device, such as PLX9054 [4, 5] This kind of design is not compact enough. The compact design is easy to be protected from imitation and malicious plagiarism Another important issue which ought to be carefully considered for biaxial motion system is arc motion, that is, how to move the cursor along a curve rather than a line [6], which requires a systematic moving algorithm to arrange the velocities and positions of the two motors of the two axes. The improved DDA algorithm is rewritten in Verilog HDL, and embedded in an FPGA device on board
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