In the process of popularization and application of CNC machining centers, many enterprises will cause problems such as the collision of tools and workpiece damage due to errors in operation or programming. While wasting processing costs, it also brings a lot of psychological pressure on operators. Therefore, in addition to being proficient in the operation process, the operator must also have an understanding of how to avoid unexpected problems during the operation of the machining center.

First, when writing homework programming, the decimal point must be accurate

Due to the continuous development of the numerical control system, many input methods no longer need to be marked with decimal points. However, to prevent the deviation of the machining size due to the decimal point, operators and programmers should develop good habits. In the program of the calculator input method, Make the decimal point as precise as possible to avoid errors as much as possible.

Second, program the origin of the workpiece coordinate system, pay attention to setting it outside the workpiece blank

In the actual machining operation, if the command value is zero or close to zero, the tool will directly point to the zero or near zero position, causing the workpiece to penetrate directly to the reference surface. If the moving speed is too fast, it may even cause an accident. Therefore, the setting of the origin must be careful and pay attention to check whether it is set outside the workpiece blank.

Third, when adjusting the workpiece coordinate system, the reference point must be outside the physical length of the tool

Different from the X and Y axes where the datum point is on the axis of the spindle, the datum point of the Z axis can be either on the spindle end or at a point other than the spindle end. If it is set at the spindle end when the command is reset to zero, the end face key of the spindle end will collide with the workpiece, and the workpiece will be seriously damaged when the tool is installed. Therefore, the reference point on the Z axis must be set at the length of the tool, to avoid injury.

Fourth, when adjusting the tool length offset, the negative value must be guaranteed

The coordinate axis direction of the machine tool is generally positive in the direction of the tool moving away from the workpiece, and negative in the direction close to the workpiece. The offset value is adjusted to a negative value, that is, the tool approaches the workpiece. To keep the tool offset value negative, the machine tool reference point must be set outside the tool length, at least on the tool position point of the reference tool.

The CNC system will have its inspection program function, but it cannot rule out the situation of wrong inspection or missed inspection. If you want to perfectly avoid possible problems or failures, it is necessary to collect and analyze various accident cases in normal operations, and summarize lessons learned and improved operating standards that can effectively prevent accidents.

Conclusion

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