Inspection of the use of CNC system

The CNC system is the core of the electrical control system of CNC machine tools.After the CNC system of each machine tool is running for a certain period of time, some damage or failure of certain components will inevitably occur.In order to extend the service life of components as much as possible and prevent various failures, especially the occurrence of vicious accidents, it is necessary to carry out daily maintenance and maintenance of the CNC system.It mainly includes: the use inspection of the CNC system and the daily maintenance of the CNC system.

In order to avoid some unnecessary failures of the CNC system during use, the operators of CNC machine tools should carefully read the relevant operating instructions before operating and using the CNC system. It is necessary to understand the performance of the CNC system used in detail, and to be proficient in the CNC system and the various buttons, buttons and switches on the machine tool operation panel. The role of buttons and switches and precautions for use.Generally speaking, the CNC system must be checked before and after power-on.

1. Inspection of the CNC system before power-on

In order to ensure the normal operation of the CNC system, when the CNC machine tool is installed and debugged for the first time or before the machine tool is powered on for the first time after handling, the CNC system can be checked in the following order:

(1) Confirm whether the specifications of the AC power supply meet the requirements of the CNC device, and mainly check the voltage, frequency and capacity of the AC power supply.

(2) Carefully check whether all the connection cables between the CNC device and the outside world are connected correctly and reliably in accordance with the provisions of the randomly provided connection technical manual.The connection of the CNC system is carried out by the pointer to the CNC device and its supporting feed and spindle servo drive unit, which mainly includes the connection of external cables and the connection of the power supply of the CNC system.Carefully check the CNC system device and MDI/CRT before connecting
Units, position display units, paper tape readers, power supply units, printed circuit boards and servo units, etc., If problems are found, measures should be taken or replaced in time.At the same time, pay attention to check whether the connecting parts and each printed circuit board in the connection are fastened, whether they are inserted in place, whether each plug is loose, and whether the fastening screws are tightened, because failures caused by defects are the most common.

(3) Whether the hardware settings on the various printed circuit boards in the CNC device meet the requirements of the CNC device.

These hardware settings include various short-circuit rod settings and adjustable potentiometers.

(4) Carefully check the protective grounding wire of the CNC machine tool.CNC machine tools must have good ground wires to ensure equipment, personal safety and reduce electrical interference. Protective ground wires must be connected between the servo unit, the servo transformer and the strong current cabinet.

Only after the above inspections are confirmed to be correct can the CNC device be put into power-on operation.

2. Inspection of the CNC system after power-on

The inspection after the CNC system is powered on includes:

(1) First of all, check whether each fan in the CNC device is operating normally, otherwise it will affect the heat dissipation of the CNC device.

(2) Confirm whether the DC power supply on each printed circuit or module is normal and within the allowable fluctuation range.

(3) Various parameters of the CNC device.Including system parameters, PLCC parameters, digital settings of servo devices, etc., these parameters should meet the requirements of the random instructions.

(4) When the CNC device and the machine tool are online and powered on, be prepared to press the emergency stop button while the power is turned on, in case the power is cut off at any time in case of an emergency.

(5) In the manual state, move each axis with a low-speed feed, and pay attention to observe whether the direction of movement of the machine tool and the coordinate value display are correct.

(6) Perform several actions to return to the reference point of the machine tool. This is used to check whether the CNC machine tool has the function of returning to the reference point, and whether the position of the reference point is exactly the same each time.

(7) Functional testing of CNC system.According to the instruction manual of the CNC machine tool CNC system, use manual or CNC programming methods to test the functions that the CNC system should have.For example: fast point positioning, linear interpolation, arc interpolation, tool diameter compensation, tool length compensation, fixed cycle, user macro program and other functions, as well as M, S, T

Only after passing the above inspections and confirming that it is correct can the CNC device be officially operated.

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