About CNC machine tool common failure and maintenance

For nc machine tool fault maintenance need technical personnel with professional technology, have wide knowledge and experience, for non-professional personnel must not repair, alone for fault need quick and according to the judgment of the fault location, fault repair methods, understanding and mastering the numerical control machine tool of the diagnostic method of the components of each device, reasonable operation, Can improve the maintenance of CNC machine tools, CNC machine tool maintenance ability, and make it normal, stable operation. At the same time, we must prepare the necessary tools, for CNC machine tool maintenance tools, detectors and meters are essential. The following simple introduction of CNC machine tools more common faults and the corresponding maintenance methods, for reference only.

One, about the power failure of CNC machine tools

In order to avoid power failure, in the design of the power supply system of CNC machine tools, we must do the following, first of all, we must have an independent distribution box, not in series with other equipment. The beginning of the power supply must be well grounded. The three-phase power supply into the CNC machine must use three-phase five-wire system, the middle line and the ground line must be separated. The electrical components in the electric cabinet should be laid out reasonably, and the laying of alternating current and direct current must be isolated accordingly.

Two, CNC machine tool system position ring failure

This kind of failure may be caused by component damage, interface signal loss and other reasons. It may also be caused by the coordinate axis moving without instructions, or too much drift, position-loop or velocity loop connected into positive feedback. This may be because related parameters are no longer in the matching state. Therefore, you must adjust them again after troubleshooting.

Three, numerical control machine tool dynamic characteristics deteriorate fault

When the quality of the workpiece in the decline, will cause the CNC machine tool factory vibration. This is usually because the clearance of the mechanical transmission system is too large, or even caused by serious wear. For the electrical control system, it may also be because the relevant parameters are not in a better matching position, and the equipment should be removed after the corresponding adjustment.

Four, nc machine tool coordinates can not find zero fault

When the coordinate of CNC machine tool cannot find zero, it may be that the distance between zero direction and zero direction is far away, or the encoder is damaged, resulting in the shift of the zero mark of the grating.

5. Data machine tools have occasional downtime

When there is incidental outage numerically-controlled machine tool machine tool plant, usually leads to the following two reasons, one is that there is a problem in the design of the software, cause certain operations and function combination fault happened, and then cause downtime, if is such a case, can after power equipment, and then to connect the power and can solve such problems. In addition, there is a kind of circumstance is the reason why environment as a result, such as the disturbance of power grid and peripheral equipment, or excessive temperature condition, etc., in many parts of the machine tools will be near the doors open position, this will lead to electric cabinet door operation will produce some dust and dust, or the situation of the water mist, in order to avoid such problems, Need to improve the peripheral environment of CNC lathe itself.

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