Maintenance of Electrical Failures of CNC Machine Tool
CNC machine tools are widely used in production and processing, because of their high degree of automation and high precision. But, like other machines, CNC machine tools are also prone to some electrical faults in production, so it is necessary to carry out maintenance operations according to the requirements to ensure the normal use of the machine. The following is the analysis of the electrical fault of CNC machine tool, and the maintenance of the electrical fault is elaborated.
1. Analysis of electrical faults of CNC machine tools
The electrical faults of the CNC machine tool mainly include the following types:1. Failure of the stepping motor to start; 2. Error in limit signal reception; 3. Short circuit in the tool magazine; 4. Failure of the spindle motor to start; 5. Loss of servo function; 6. Faulty display.
2. Maintenance of CNC machine tool electrical fault
(1) When the stepping motor fails to start, it is necessary to first check whether the wiring of the power line is correct and reliable, and whether the fuse and starter are damaged. If the wiring of the power line is normal, it is necessary to check whether the stepping motor electromagnet is strong enough and whether the stepping motor control circuit has malfunction.
(2) When the limit signal reception is wrong, it needs to check whether the connecting wire of the limit switch is faulty or not, and whether the limit switch is in good condition. If these are normal, it is necessary to check whether the trigger pulse signal is output, and whether it is the same as the program setting of the machine tool control system.
(3) If a short circuit is found in the tool magazine, it needs to find out whether the reason is that the wiring has been improperly connected or the contact is poor. If there is a wiring problem, it needs to be adjusted, and if the contact is poor, it needs to be replaced.
(4) When the spindle motor fails to start, first check whether the wiring of the power line is normal, and whether the fuse and starter are damaged. If the wiring of the power line is normal, check whether the spindle control circuit is faulty.
(5) If the servo fails to work, it needs to check whether the power supply voltage is normal and whether the servo amplifier output is normal. If abnormal, it should be adjusted.
(6) When the display screen is malfunctioning, it needs to check whether the power is connected or not, and whether the display switch or crystal tube is faulty or not. If there is a problem, it needs to be repaired properly.
In conclusion, the electrical failure of the CNC machine tool needs to be carefully checked in order to find out the cause of the failure and adjust or replace it in time so as to ensure the normal use of the machine.
