Control mode: the motion control card and the motion controller rely on the emission pulse to control the servo motor, and control the motor speed by changing the pulse frequency, in principle, the two are the same. The difference is that the motion controller mainly transmits commands through its own inherent programs, or receives new commands from the host computer to execute; The motion control card has a huge PC database to use, can execute more commands, and the control method is more flexible.
Connection method: The motion control card is a PC-based upper control unit, which needs to be used with the supporting PC, and the two also need to be connected through PCI protocol or 104 protocol. The motion controller is installed and operated independently, and the installation methods include panel type, instrument type, guide rail type, etc.
Extensibility: Motion controllers are similar to PLCs, mainly relying on their own stored programs to execute commands, if they encounter functional requirements other than stored programs, they need to accept new programs from the host computer before executing. Relying on the PC platform, the motion control card itself can realize the expansion of many functions such as drawing, typesetting, visual recognition, etc., and the expansion is stronger.
Stability: The structure of the motion controller itself is relatively simple, the system operates independently, and the stability will be better. The motion control card is based on the PC platform operation, in the work, need to give priority to ensure the stability of the PC's own system, followed by the stability of the motion control card and the corresponding control software, and all kinds of connection lines will also be affected by electromagnetic interference, relatively speaking, the stability is not as good as the motion controller.
Application scenarios: The application fields of motion control cards include machine tools, industrial robots, semiconductors, packaging, textiles, etc., more common include laser cutting machines and vibrating knife cutting machines, etc., which are widely used in clothing, footwear, advertising, kitchenware, car decoration, sheet metal, electronic 3C, medical equipment and other industries. Motion controllers are more concerned in heavy industries, such as metallurgy, mining, forging, machinery, wind power, etc.