ABB PHCBRC10000000R HARMONY BRIDGE CONTROLLER NSMP

Working principle and application of motion controller

We will explain in detail the application and working principle of motion controllers in CNC systems.

Traditional CNC machine tool control methods mainly include relay control, microcontroller control, and PLC control. Currently, CNC systems are increasingly trending towards openness, and relays, PLCs, and microcontrollers have relatively poor expandability and portability, failing to meet the development requirements of CNC systems. In recent years, motion controllers have been widely used due to their advantages such as good openness, portability, high reliability, powerful control functions, small size, and high cost-effectiveness. After development, motion controllers are now used in almost all industrial enterprises. Motion controllers can be applied to the CNC retrofitting of traditional machine tools as well as the design of new CNC machine tools, reducing costs, saving energy, and improving efficiency. This paper takes the control system of a robotic arm as an example to introduce the design of a CNC system based on a motion controller.

1. Overall Scheme of CNC System

As shown in Figure 1, the entire CNC system consists of two parts: hardware and software. The hardware part is further divided into control system hardware and electrical control cabinet. The control system hardware includes motion controllers, I/O (input/output) interfaces , drive modules, and execution modules; this part is the core of the CNC system hardware. The electrical control cabinet consists of power circuits, control circuits , and signal indication circuits. Since existing motion controllers are small in size and highly integrated, they can be directly placed in the electrical control cabinet. The software programming of the CNC system is related to the hardware. Generally, motion controllers and touch screens provide programming tools and languages, allowing users to design the software according to their specific needs.