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Vertical machining center is a necessary machine tool with high precision for modern workpiece processing. The existing technical level has become an important symbol of enterprise modernization, replacing the processing machine tools, and has become the current development direction of manufacturing industry. At the same time, it is also an important model of machine tool series, which has a wide range of applications. Vertical machining center plays an important role in aviation manufacturing industry. The data acquisition system consists of the front terminal system and the key components of the machine tool monitoring system. The design effect of data acquisition system determines the effective data performance of vertical machining center monitoring system.

Self diagnosis function can not only display fault alarm information on CRT display, but also provide machine parameters, status information, general data and status check in the form of multi page "diagnosis address" and "diagnosis data": parameter check and interface check. The way.

The interface check refers to the input and output interface signals between the system and the machine tool, including the input and output signals between the vertical machining center system and the PLC, and between the PLC and the machine tool. The input and output interfaces of the diagnosis CNC system can display the status of all switch signals on the CRT display, and use "1" or "0" to indicate the presence or absence of the signal. The status display can be used to check whether the signal of the vertical machining center system has been output to the machine side, and whether the switch value of the machine side has been input to the vertical machining center system, so that the fault can be eliminated. Located on the machine side or in the system.

Parameter inspection machine data is an important parameter obtained after a series of tests and adjustments, which is the guarantee of normal operation of the machine tool. These data include gain, acceleration, profile monitoring tolerance, clearance compensation value, pitch compensation value, etc. When external interference occurs, the data will be lost and confused, and the machine tool will not work normally.