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Precautions for CNC machine tools before they are put into use

 

First, understand the use of CNC machine tools

In order to avoid some unnecessary failures in the use of CNC machine tools, the operators of CNC machine tools should carefully read the relevant operating instructions before using the CNC system, and should understand in detail the performance of the CNC system used, and should be proficient in the role of each key, button and switch on the CNC system and the machine tool operation panel and the precautions for use.

Second, the use environment of CNC machine tools

1. In order to improve the service life of CNC machine tools, it is generally required to avoid direct sunlight or other thermal radiation.

2. Keep away from strong electromagnetic interference sources to make the machine tool work stably.

3. Avoid using it in an environment that is too humid and has a large temperature difference. For high-precision and expensive CNC machines, they should be used in an air-conditioned room.

4. Avoid using it in places with too much dust or corrosive gas. Corrosive gases can easily cause corrosion damage to electronic components, resulting in poor contact or short circuits between components, affecting the normal operation of equipment. 5. Machine tools should be kept away from equipment with large vibration (such as punches, forging equipment, etc.). For high-precision machine tools, anti-vibration measures (such as anti-vibration grooves, etc.) should also be used.

Third, the power supply requirements of CNC machine tools

1. The CNC system has strict requirements for power supply, and the working voltage is generally required to be 220V±10%, and the fluctuation cannot be too large.

2. In order to avoid the impact of large power fluctuations and possible instantaneous interference signals, for qualified enterprises, special line power supply or voltage stabilization devices can be added for CNC machine tools to reduce the impact of poor power supply quality and provide a strong guarantee for the normal operation of CNC machine tools.

3. Before using the machine tool, it is necessary to confirm whether the specifications of the AC power supply meet the requirements, and check the voltage, frequency and capacity of the AC power supply.

Fourth, the inspection of CNC machine tools before power-on

1. Machine tool electrical inspection

Open the electric control box of the machine tool and check whether the relay, contactor, fuse, servo motor speed, control unit socket, spindle motor speed control unit socket, etc. are loose.

If it is loose, it should be restored to normal state, and the connector with a locking mechanism must be locked. The machine tool with the adapter box must check the socket on the adapter box, whether the wiring is loose, and the locking mechanism must be locked.

2. Check the circuit board of the CNC system

Check whether the hardware settings on the various printed circuit boards meet the requirements. Carefully check that all cables connecting the CNC device to the outside world are correctly and reliably connected as specified in the supplied connection technology manual.

Check all kinds of interface sockets, servo motor feedback line sockets, spindle pulse generator sockets, hand pulse generator sockets, etc., if there is looseness, it should be plugged back in, and the locking mechanism must be locked.

Check the setting of the short-circuit terminal on each printed circuit board according to the technical manual or manual, it must conform to the state set by the machine tool manufacturer, and it should be re-set if it is indeed wrong, and there is no need to re-set it under normal circumstances, but the user must make an original record of the setting state of the short-circuit terminal.

3. Line connection quality inspection

Check that the connectors, terminal blocks, and individual printed wiring boards are tight. Check that they are inserted in place, that the terminals are not loose, and that the fastening screws are tightened, as failures due to defects are the most common.

Each terminal should be tightened once with a screwing tool, until it cannot be screwed with a screwing tool, and each motor socket must be tightened.

4. Solenoid valve inspection

All solenoid valves should be pushed several times by hand to prevent poor operation caused by long-term power-on, if abnormalities are found, they should be recorded for repair or replacement after power-on.

5. Check the limit switch

Check whether the flexibility and fixation of all limit switches are firm, and deal with them immediately if they are found to be poor or not firmly fixed.

6. Check the buttons and switches on the operation panel

Check the wiring of all buttons, switches, and indicator lights on the operation panel, and deal with it immediately if there is any error, and check the socket and wiring on the display unit.

7. Ground wire inspection

CNC machine tools should have a good ground wire to ensure equipment, personal safety and reduce electrical interference, and the protective grounding wire should be connected between the servo unit, servo transformer and strong current cabinet.

 

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