The laser cutting machine can be divided into four key parts: upper computer software, mechanical control circuit, mechanical transmission part, and laser generator.
(A) PC software: The key to human-machine dialogue is the PC software. The operability of a smart device or an automation device is determined by this. Relatively more flexible with the mechanical part of the software, the cost and time spent more, which is often overlooked.
(B) Mechanical control circuit: In the open-loop control system, the stepper motor is indispensable, the stepper motor has no error accumulation, and the control is simple and inexpensive. The general mechanical control circuit is divided into two parts: First, the PC is the main body, and the PC itself carries out the interpolation operation of the relevant cutting material edge, and then the control timing is given through the PC port, and the control timing is amplified and processed directly through the external circuit. Drive stepper motor work. Second, the microcontroller is the main body, and the PC is the auxiliary. The PC's interface only outputs signals of a certain format, and then performs operations such as checking and compensation in the microcontroller, and finally outputs the amplified and controlled stepping motor. To sum up the above two control systems, the former monopolizes the timing of computer work, so more CPU resources are needed to control the system. The result is that the PC can hardly do other operations during control. The second type of control system is because the computer only outputs a file in one format and then is processed by the microprocessor in the control circuit so that the computer can do other things during the processing.
(C) Mechanical transmission part: The mechanical part is relatively simple in terms of accuracy requirements and processing power is not too large, and the processing costs are relatively low. Laser cutting almost does not need to consider the problem of processing force, and the cutting of leather materials such as leather does not require too high accuracy, so the mechanical part can use common ball screw and linear light rod solutions to reduce the cost of mechanical components . Laser processing Because the processing depth is achieved by controlling the laser power, the Z-axis of the mechanical part can be omitted, and only the X-axis and Y-axis are required to perform plane movement.
(D) Laser generator: For the processing of textiles such as leather, it belongs to non-metal processing. Generally, a CO2 laser generator is used, and the wavelength of 10.6 um can be 40-60 W. Use software awareness to control the size of the power. PWM modulation method (not verified in the field) is currently considered in the control method.
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