基于CANopen通信协议的数控手轮研究  

CNC hand-wheel based on CANopen communication protocol

作　　者：刘正瑞[1] 洪占勇[1] LIU Zheng-rui;HONG Zhan-yong(Institude of Industry ＆ Equipment Technology,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学工业与装备研究院,安徽合肥230009

出　　处：《机电工程》2018年第9期996-1000,共5页Journal of Mechanical & Electrical Engineering

摘　　要：针对数控系统中手轮驱动问题,对手轮驱动的信号采集、信号处理和信号传输等进行了研究。对手轮脉冲漏记、脉冲错计和信号输出不均匀等问题进行了归纳,提出了一种以STM32 ARM Cortex-M3内核的单片机为核心且采用CAN总线的高层协议CANopen协议,并进行了总线通信的手轮驱动方案设计;通过在信号获取端直接数字化处理,实现了脉冲读取、脉冲计数、进给轴选择、步长倍率的选择、方向判断和输出进给信号等功能。研究结果表明:该方案可以实现控制信号的实时和均匀化输出,通过对连续报文中的数据进行比较计算,上位机可以判断出是否存在漏记、漏记进给信号的数量,并可以此为根据采用相应的方式进行补偿,从而提高手轮驱动的精确度和可靠性。Aiming at hand wheel drive in the numerical control,the problems of signal acquisition,signal processing and signal transmission in hand wheel drive was studied,the problems such as pulse missing register,pulse meter wrong and the signal output is not uniform has carried on the induction. A kind of hand wheel driving scheme that take the STM32 ARM cortex-M3 as the core and use CANopen protocol that is high-level protocol of CAN bus to bus communication was proposed. The functions such as pulse reading,pulse counting,the choice of feed shaft,the choice of the step length ratio,feed direction judgment and output signal was implemented at the signal acquisition end. The results indicate that the scheme can realize real-time control signal output and homogenization,through comparing the calculation of the succession of the packet data,host computer can determine whether there is leakage,record the amount of feed signal leakage,and can be used according to the corresponding way to compensate,so as to improve the accuracy and reliability of the hand wheel drive.

关 键 词：手轮 CANOPEN 数控系统 

分 类 号：TH39[机械工程—机械制造及自动化] TG502.35[金属学及工艺—金属切削加工及机床]