电脑横机机头位置检测研究

Study of the Position Testing of Carriage of the Computerized Flat Knitting Machine

对电脑横机机械传动系统进行分析,包括机头的运动和摇床的运动这两个电脑横机的主运动。根据横机的同步带的减速比,研究电脑横机输入脉冲与针距之间的关系,同时也研究了针距与编码器输出脉冲的关系。为了保证编码器数据采集的准确性,利用CPLD器件对编码器输出脉冲进行倍频处理,倍频后的脉冲按机头位置进行计数,从而使其脉冲的误差值最小。同时,利用软件对各种信号进行了模拟仿真,其仿真的结果可以满足电脑横机机头位置的实时采集要求,为电脑横机控制系统的设计提供了一种技术手段。

The paper analyses the mechanical drive system of computerized fiat knitting machine including two kinds of main motions-the carriage motion and shogging movement. According to the reduction ratio of synchronous belt, it studies the relationship between the input pulse and the needle gauge of computerized fiat knitting machine, and also presents the relationship between the needle gauge and the output pulse of the encoder. The output pulse of encoder is processed through frequency multiplication processing used the CPLD device to ensure the accuracy of data acquisition of the encoder, and then the counts of the pulse is indicated according to the carriage position, which makes the pulse error minimum. Finally, it points out that the simulation results of all kinds of signals can meet the real-time acquisition requirements of the carriage position of computerized flat knitting machine, which can provide a kind of technical method for design of the controll system.