The key component of fiber laser cutting machine manufacturers is the cutting head
Fiber laser cutting machine manufacturer Fiber laser cutting machine is an important equipment for garment factories to cut clothes in large quantities. It can cut a few centimeters of cloth at a time with high efficiency. The open CNC system controlled by a computer can improve the cutting accuracy. Further improve the utilization rate of cloth u003d In this system, the control mode of the multi-axis motion control board is adopted, and the PMAc motion control board. The standard slot of the eight PC machine is used for real-time control, and the PC machine is used as a human-computer interaction interface and System management. Through the modular design method, a unified and reconfigurable system die platform is established, which greatly enhances the flexibility and adaptability of the CNC system. This control system is built by plugging in the PMAC motion control card and the general I/O card DIO48 on the PC. PMAC is a multi-axis motion control card produced by Delta? TauSystems in the United States. It uses a digital signal processor as its core. It can manipulate 1-8 axes at the same time, and can be extended to 16 blocks # to control 128 axes. IMAc has an open platform, not only can use (: code. but also can be programmed in c or Basic language, and can update the service loop and communicate with PC through serial port and bus. In addition, PMAc can realize real-time multitasking through priority judgment , Improve the operating speed and control accuracy of the control system. The hardware structure and working principle. The PC and the PMAC card mainly use the ISA bus for communication. The upper computer PC mainly realizes the control and management of the system, and the lower computer PMAC completes the real-time control of the name axis. Movement, and real-time feedback of movement status, such as motor position, operating status, etc. The system hardware structure is shown in Figure 1.
The key component is the cutting head, which has three degrees of freedom that need to be controlled, namely the X-axis position, the Y-axis position and the rotation angle C around the Z-axis. For cost considerations, this system is plugged into the PC ISA standard bus. The MINAS-type PMAC card controls the position of the X-axis and the Y-axis, and drives the cutting head to move in the XY plane. The X and Y axes are driven by a 400W AC servo motor through a planetary gear reducer. The trajectory continuously adjusts the rotation angle C, so that the forward direction of the cutter head is consistent with the tangent direction of the curve. At the same time, the position electric sensor collects the force on the cutter surface, and the output is digital signals f0, f1, f2 after being processed by the voltage comparison circuit. The combination state of the individual values u200bu200bcompensates for the deflection angle of the cutter head to balance the force on both sides of the blade, and the cutter surface maintains the vertical movement up and down, so that the cut pieces are consistent in size and shape to ensure cutting accuracy. The universal I/O card is inserted into the slot of the PC through the PCI bus. It controls the stepper motor by outputting control signals CP, CW, EN, and realizes the rotation of the cutter head. J5 port is a general-purpose digital input and support outlet. It provides 8 general-purpose digital inputs and 8 general-purpose digital shooting. These inputs and outputs are usually taken by the software by defining M variables. In the definition of M variable, variables M1 to M8 are used to read output 1~8 respectively, and M11~M18 are used to read input 1~8 respectively. The movement of the cutter head to vibrate up and down to cut the cloth is controlled by the permanent magnet brushless DC motor. Synchronous gear belt transmission, which converts the rotation of the eccentric wheel into the up and down movement of the cutter head.
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