Design of Focus Control System of Fully Automatic Fiber Laser Cutting Machine
A vital part of the automatic fiber laser cutting machine, it is directly related to the accuracy and stability of the distance between the laser focus and the workpiece, which determines the cutting quality and efficiency of the metal workpiece. To this end, a high-performance DSP, high-precision capacitive sensor, etc. are used to design a metal laser cutting machine focus control system to control the distance between the laser focus and the workpiece in real time and cooperate with the machine tool motion control card to complete the entire metal laser cutting process. First, the structure and working principle of the focus control system of the metal laser cutting machine are introduced, and then the hardware design of the system is emphasized, and part of the core software design process is given.
In the metal laser cutting process, the distance between the laser focus and the workpiece is extremely important. The focus control system is used to continuously correct it in real time to obtain better cutting quality.
The automatic fiber laser cutting machine adopts high-performance DSP, high-precision capacitance sensor, etc. to design the focus control system of the metal laser cutting machine, and uses capacitance sensor detection technology and fuzzy PID control algorithm to control the difference between the laser focus and the workpiece. Real-time control of distance and coordinated with machine tool motion control card to complete the entire metal laser cutting process, improving cutting quality and cutting efficiency.
Automatic fiber laser cutting machine system structure, the system mainly includes two parts: focus position detection module and focus position control module. The focus position detection module is composed of a capacitance signal detection circuit and a signal transmission circuit. The focus position control module is composed of a capacitor signal receiving circuit, a motor control signal output circuit, a command signal receiving circuit, and a data storage circuit. Its function is to receive the measured capacitance value sent by the focus position detection module, and output the motor control in real time through the control algorithm Signal, adjust the motor to achieve the purpose of reducing the distance deviation. The system selects TMS320F28335 model DSP as the main controller, its clock frequency can reach 150MHz, I/O resources are rich, support SPI communication, USB communication and DA output functions, can achieve efficient and fast calculations, so as to achieve the focus position detection module and Fast data exchange and calculation of machine tool motion control card.