1. Mechanical transmission fault because of mechanical component installation, commissioning, operation due to improper;
2. Because the guide rail, spindle and other moving parts, friction interference caused by the fault of the big reasons;
3. The fault caused by the mechanical parts are damaged, coupling bad reasons;
Therefore, numerical control machine tool will need regular maintenance, maintenance, and can control and eradication; three leakage; phenomenon, reduce host fault. CNC machine electrical control system fault is divided into weak and strong fault; fault two kinds big, weak part refers to the control of the electronic components, integrated circuit as a main part of control system. The weak part of NC machine tools including CNC, PLC, MDI/C, RT and servo drive unit, output unit. High voltage part refers to the control circuit or high voltage, high power loop control system in the relay, contactor, switch, fuse, power transformer, motor, an electromagnet, a travel switch and other electrical components and the composition of the. Weak fault and fault faulty hardware and software. Hardware failure is refers to the integrated circuit chip, the discrete electronic components, connectors and the external connection components occur. Software fault refers to appear in the hardware under normal circumstances the action out of germanium, data loss and other fault, there are common. The error processing program, system program and parameters of the lost or changed, computing error etc.. This section of the fault diagnosis and repair, although convenient, but because it is in working condition of high pressure, high current, probability of failure is higher than the weak part. We must pay attention to enough repair personnel.
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