Period pants machine system fault maintenance is usually carried out through on-site fault diagnosis and analysis, fault measurement, maintenance and troubleshooting. In addition, after the period pants equipment fails, there is not only no alarm information, but also the information required for maintenance. It is necessary to carefully check the diagnosis and treatment of such faults according to specific conditions, analyze the small phenomenon and find out the real cause. To find out the causes of such faults, first find out the real fault phenomena from various surface phenomena, and then find out the causes from the confirmed fault phenomena.

1.Fault diagnosis of period pants machine

(1) External before internal

The reliability of the period pants machine system is getting higher and higher, the failure rate of the machine system itself is getting lower and lower, and most of the failures are caused by non system itself. As the mechanical equipment is a set of mechanical, hydraulic and electrical equipment, its failure will also be reflected by the three. The maintenance personnel shall check one by one from the outside to the inside. Try to avoid opening and disassembling at will, otherwise it will enlarge the fault, make the equipment lose accuracy and reduce performance. The external faults of the system are mainly caused by the problems of detection switch, hydraulic components, pneumatic components, electrical actuating components, mechanical devices, etc.

(2) Mechanical before electrical

Generally speaking, mechanical faults are easy to find, while mechanical system and electrical faults are difficult to diagnose. Before troubleshooting, first pay attention to the elimination of mechanical faults.

(3) Static before dynamic

Under the static state of equipment power failure, through understanding, observation, testing and analysis, it is confirmed that power on will not cause fault expantsion or accident. In the running state, dynamic observation, inspection and test are conducted to find faults. If a destructive fault occurs after power on, the danger must be eliminated before power on.

(4) Simple before complex

When various faults are intertwined and cannot be started temporarily, the easy problems shall be solved first, and then the difficult problems shall be solved. Usually, after a simple problem is solved, the difficult problem may also become easy.

2.Fault diagnosis technology of period pants machine

Period pants machine is a high-tech intensive product. In order to quickly and correctly find out the cause and determine the fault location, diagnostic technology must be used. With the continuous development of microprocessors, diagnosis technology has also developed from simple diagnosis to multi-functional advanced diagnosis or intelligent diagnosis. Diagnostic ability is also an important index to evaluate the performance of machine system.

(1) Starting diagnosis

Starting diagnosis means that the system internal diagnostic program automatically performs diagnosis each time it is powered on. The diagnosis contents include the most critical hardware and system control software in the CPU, memory, i/o and other systems, as well as mdi/crt unit, paper tape reader, floppy disk unit and other equipment or external equipment. The whole system can only enter the preparation state for normal operation after confirming that all items are correct. Otherwise, the fault information will be indicated on the CRT screen or led through alarm. At this time, the startup diagnosis process cannot be completed and the system cannot be put into operation.

(2) Online diagnosis

Online diagnosis refers to the automatic diagnosis and inspection of servo unit, servo motor, spindle servo unit, spindle motor and external equipment connected to the system itself and equipment through the internal program of the system. As long as the system is not powered off, the on-line diagnosis will not stop.

(3) Offline diagnosis

Offline diagnosis means that the machine system manufacturer or professional maintenance center uses special diagnostic software and test device to stop (or offline) inspection after the machine system fault. Try to locate the fault in the smallest possible range, such as reducing the functional modules, some circuits and even chips or components, so as to make the fault location more accurate.

During the actual use of period pants machine, some faults do not alarm and the phenomenon is not very obvious. Dealing with this situation is not so easy. The diagnosis and treatment of this kind of fault must be carefully checked according to the specific situation, and the tiny phenomenon must be analyzed to find out the real cause.