External fault case analysis of CNC machine tool machining center
External fault case analysis of CNC machine tool machining center
As the reliability of modern NUMERICAL control system is higher and higher, the failure rate is lower and lower, and rarely occurs. Most failures are non-system failures and are caused by external causes.
Modern CNC equipment are electromechanical integration products, more complex structure, perfect protection measures, a very high degree of automation. Some faults are not caused by hardware damage, but by improper operation, adjustment, or handling. This type of fault occurs frequently in the early use of the device, when operators and maintenance personnel are not familiar with the device.
Machining center external fault case one
A CNC milling machine, when just put into use, the rotary table often does not rotate the problem, after the machine tool working principle and processing process analysis, found that the problem is related to the indexing device, only the indexing device in the starting position, the table can rotate.
Machining center external fault case two
A CNC milling machine hit the knife accident, after pressing the emergency stop button, change the new knife, but the table does not rotate, through the PLC ladder diagram analysis, found that the tool change process is not correct, the computer thinks that the tool change process is not over, can not carry out other operations, according to the correct program to change the tool, the machine tool returned to normal.
Machining center external fault case three
There are several CNC machine tools, when just put into use, sometimes there is an accident, the operator press the emergency stop button, the system power restart, then the machine tool does not return to the reference point, must be adjusted, sometimes have to manually disk to the non-interference zone. Later, after learning lessons, press the emergency stop button, the operation mode will be manual, release the emergency stop button, the machine tool to return to the normal position, then operate or power, there will be no problem.
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