When the CNC plasma cutting machine realizes precision cutting, its primary basis is to ensure the precise positioning of the torch's walking movement. The simple understanding is that the torch can stably and reliably follow the cutting pattern track and lock a cutting during the cutting process. The starting point of the trajectory. Of course, we describe the positioning function of the CNC plasma cutting machine control system too much. In fact, all equipment manufacturers design the machine control system function according to this purpose, but even so we can still find many manufacturers produce The CNC plasma cutting machine has great differences in cutting quality and precision when it comes to industrial production. Below, Wuhan Jiabide Technology will take our company Xunfeng T series precision CNC plasma cutting machine as an example to briefly explain the working principle of its positioning system and the corresponding advantages in the batch processing.
The CNC plasma cutting machine is equipped with a cutting tool that cuts the object. This mechatronic cutting machine is called a CNC cutting machine. Most cutting machine systems can be cut by combining with CAD graphics. In the CNC cutting machine, the relative coordinates and absolute coordinates are also divided. Today, we will analyze the relative and absolute coordinates of the CNC cutting mechanism diagram.
It is worth mentioning that mechanical drawing is very important. It can display various parts in a more comprehensive way. For CNC plasma cutting machine, the mathematical processing of numerical control part drawing is mainly to calculate the size of the part processing track, that is, calculate the part. The base point of the contour and the coordinates of the node, or the base point of the tool center contour and the coordinates of the node, to program the machining program.
When using a digital program to drive a precision CNC plasma cutting machine, the requirements for its positioning control system are as follows:
I. Introduction of the relative coordinate system of precision CNC plasma cutting machine
1. Relative Cartesian coordinates: @dx, dy; coordinate increments to the previous point;
2. Relative polar coordinates: @distance <angle.
Second, the precision CNC plasma cutting machine absolute coordinate system
1. Cartesian coordinates (x, y, z) The x coordinate represents the position in the horizontal direction, and the y coordinate represents the position in the vertical direction. The coordinates of any point in the 2D map can be located in the form of (x, y).
2. Polar coordinates: distance < angle. You can enter the distance of a point from the origin and its angle in the xy plane to determine the point. For example, 10<45 indicates a point at which the distance from the origin is 10 and the angle with respect to the x-axis is 45 degrees.
Third, precision CNC plasma cutting machine base point coordinate algorithm
Generally, CNC plasma cutting machines have only linear and circular interpolation functions. For a plane profile consisting of a straight line and an arc, the main task of numerical calculation during programming is to find the coordinates of each base point.
Here we call the base point, which means that the intersection or tangent point of the different geometric lines that make up the contour of the part is called the base point. The base point can be used directly as the starting point or end point of its motion trajectory.
The coordinate calculation of the precision CNC plasma cutting machine needs to be based on the requirements of filling in the processing program list. The direct calculation of the base point includes: the coordinates of the starting point and the end point of each motion track in the selected coordinate system, and the circular motion track. Center coordinate value.
The method of direct calculation of the base point of the precision CNC plasma cutting machine is relatively simple, and can generally be done manually according to the known conditions given by the part pattern. That is, the values ​​are directly calculated based on the knowledge of algebra, triangle, geometry, or analytic geometry given by the given dimensions on the part pattern. When calculating, be careful to keep enough digits after the decimal point to ensure sufficient accuracy.
Fourth, precision CNC plasma cutting machine node coordinate positioning
For some planar contours, the non-circular equation curve Y=F(X) composition, such as involute, Archimedes spiral, etc., can only be approximated by straight lines and arcs that can be processed. The task of numerical calculation at this time is to calculate the coordinates of the node.
When using a CNC machine tool that does not have non-circular curve interpolation function to machine parts with non-circular curve contours, in the preparation of the machining program, multiple straight line segments or arcs are often used to approximate the non-circular curve. This is called fitting. deal with. The intersection or tangent of a fitted line segment is called a node.
The computational node coordinates of the node coordinates are computationally difficult and the workload is large, so it is often done by computer, and can also be manually calculated if necessary. Commonly used are linear approximation methods (equal spacing method, equal step method, and equal error method). Arc approach method.
Because of the advanced nature, complexity and rapid development of precision CNC plasma cutting machines, as well as the variety of models and grades, and the price is relatively expensive, when using precision CNC plasma cutting machine, it should be Leading and professional technicians conduct in-depth and meticulous research, or entrust a consulting agency composed of experienced CNC experts to consult or represent, so as to correctly select precision CNC plasma cutting machine equipment.
Wuhan Jiabide Technology Co., Ltd. is a professional manufacturer of CNC cutting machine, CNC laser cutting machine, CNC flame cutting machine, CNC plasma cutting machine, CNC flame plasma dual-purpose cutting machine, advertising CNC cutting machine, CNC intersecting wire cutting machine, The company is always a high-tech enterprise integrating CNC products. The company always adheres to the business philosophy of “winning by quality and honesty†and adheres to the guiding principle of “service-oriented and market-orientedâ€. In the principle of customer first, the pursuit of perfect service. 24 hours to provide host display, sales, door-to-door, installation and commissioning, technical maintenance and other services. Maximize service to users.
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