PLC in the numerical control machine tool fault maintenance ideas _PLC - in nc machine tool fault maintenance measures Industrial control -

PLC in the numerical control machine tool fault maintenance ideas

( 1) Fault diagnosis data

in the diagnosis of faults in the process of PLC program content as the key, can be linked with nc machine tool, during the actual detection and diagnosis, according to the characteristics of the structure of nc machine tools and related functions, to prepare action text and alarm text to realize the monitoring work. If the abnormal situation, numerical control machine will alarm, it can be as a maintenance information and basis, ensure the maintenance of nc machine tool structure.

( 2) Action of fault diagnosis analysis

during the nc machine tool fault diagnosis can be carried out according to the action order diagnosis work, the order of the use of automatic switching action complete a task, to look at the actual situation of the mechanical movement, in the normal movement of contrast, clear whether failure problem, find suspicious, clear the cause of the problem, to improve the reliability and effectiveness of maintenance work.

( 3) Object principle analysis measures

for nc machine tool, in the process of using PLC to carry out the maintenance work, should make clear the main principle and control behavior, establish a diversified inspection scheme, comprehensively enhance the level of diagnosis and maintenance work and meet the demand of the current practical application. In order to better diagnosis and management of the implementation of the work, need for object principle of nc machine tool were analyzed, and the working principle of the clear of the errors and problems, ensure that all aspects of work within the rules.

( 4) I/O status analysis measures

in the process of actual diagnosis and maintenance, should be carried out according to the actual situation of the I/O status analysis, use the scientific way to handle it, clear the running state of the interface, the use of scientific way to solve problems, create diversified analysis and management mechanism, improve the maintenance management level, increase the intensity of work, to coordinate the relationship between the various aspects work, create a good environment for data processing.

( 5) Ladder diagram of the diagnostic measures

in the course of using PLC controller to implement diagnosis, can use ladder diagram of the way for the treatment, in order to clear and solve the problem of nc machine tool fault. Way in the use of PLC controller ladder diagram, research should be based on the specific content, working principle and action sequence, to coordinate the relationship between the interlock, and then in view of the system of automatic diagnosis function and closed to programming function analysis, to promote the optimization of the system operating status, to enhance management effectiveness. In diagnosis work, need to clear the specific fault reason, enhance the effect of management.

PLC in the numerical control machine tool fault maintenance measures

( 1) Maintenance checks before the

before the maintenance should be carried out in view of the actual situation of the nc machine tool spindle rotation inspection, found that occasionally make alarm prompt. Can preliminary diagnose the faults of CNC machine tools and the practical operation of the spindle, and carries on the reasonable analysis, in the process of troubleshooting, through testing lubricating pressure switch, clear the specific circumstances. During this period, and the cause of the problem for screening, the PLC as the main way of fault control, internal signal data of the system and so on to carry on the reasonable analysis and understanding, in view of the signal is activated by means of automatic alarm processing, forming alarm response, directly or indirectly, to cut off the coordinates and spindle servo.

( 2) To do a good job of fault diagnosis

during fault diagnosis, the application of PLC control program to complete relevant tasks, comprehensive analysis was carried out on the main program, the rotation of the spindle is in operation, and based on signal process to implement diagnosis work, to improve its management level. During the inspection on torque motor equipment shall specify the motor cooling system is normal. In nc machine tools system check, shall specify the torque motor spindle is normal, and guarantee the standardization of installation. In measurement system analysis work, should be clear incremental detection device characteristics and requirements of application of comprehensive analysis of the specific content, improve the application effect of detection device. During the electrical installation structure of the actual test, need to solve the problem of power line were analyzed, and clear the condition of the ground, and understand the status of connection overheat detection equipment. In addition, the need for measuring cable structure reasonable analysis, clear whether normal, and carries on the reasonable analysis.

( 3) To do a good job of hardware connection

in the hardware connection, testing should be according to actual situation, a clear torque feedback of electric device, in view of the system of strict control, coordinate the relationship between the signal and to carry out the centralized management and control, etc. At the same time, need to do a good job driving and electric device configuration, based on the characteristics of the application of PLC and the strict analysis, create diversified management mechanism, improve service quality.

CNC machine tool enterprises in maintenance work, shall specify the application of PLC controller characteristics and requirements, create diversified management mechanism, clear all aspects of working characteristics and requirements, reasonable analysis and control, to create a diversified and modern management mechanism.

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