Research For Multi-axis Coordinated Control Of Reinforcing Cage Seam Welder

Multi-axis coordinated control precision of seam welder directly determines the welding quality of reinforcing cage,so it is significant for seam welder to research multi-axis coordinated control.This paper firstly analyzes the existing control strategies according to the control requirements of the seam welder.Then the basic structure and working principle of seam welder are detailedly analyzed and the causes of motion excitation were found.The model of the servo motors and interference factors are established.According to the control requirements and the actual application situation of the seam welder this paper selected Omron NJ301 as the motion controller and selected Ether CAT as the field bus.Finally,the virtual axis control model was established using Simulink based on the models of the servo motors and the optimization method of the parameters of the virtual axis was analyzed.Compared with the command control and master-slave control,the control effect of the virtual axis control is best and could meet the control requirements of seam welder.