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Numerical control lathe electrical maintenance and fault

by:SNK     2020-08-28
CNC lathe electrical maintenance and breakdown of the release date: 2016 - 02 - 16 clicks: 2240 times of CNC lathe electrical failure analysis process is failure of exclusion process, here are a few common give a brief introduction of electrical failure, reference for WeiXiuZhe: 1, the power supply is the maintenance system and even the entire numerical control machine to work normally, the energy source of its failure or fault light person will lose data, causing downtime. The person that weigh will destroy partial or all of the system. Western countries because of the power supply, power quality is high, so the less the power of the electrical system design considerations, this is our country has large fluctuations and higher harmonic power supply network is slightly less than, plus some man-made factors, appears unavoidably caused by power failure. As far as possible in the design of the power supply system of nc machine tool should be done: (1) to provide independent distribution box and other equipment series. (2) the poor quality of power supply in the region should be equipped with three-phase ac voltage stabilizer. (3) the power head has a good grounding. (4) into nc machine tools of three-phase power supply should use three-phase five wire, the center line ( N) With the ground ( PE) Strictly separated. 5. Electrical appliance parts contained in the layout and ac, dc wire laying to isolated. 2, CNC system position loop fault position loop alarm. May be the position measurement circuit broken; Measuring element damage; There is no such as position control of interface signal. (2) axis movement in the absence of instructions. May be excessive drift; Position loop and speed loop connect into a positive feedback; Feedback connection open circuit; The measuring element damage. 3, coordinate nc machine tool can't find the direction of zero may be zero, away from the zero point; Encoder damaged or open circuit wiring; Grating shift of the zero mark. Back to zero speed switch failure. 4, numerical control machine tool dynamic characteristics, the workpiece processing quality to drop, even under a certain speed machine tool vibration. There are very big one possibility is that this gap is too large mechanical transmission system and even badly worn or guide due to insufficient lubrication and wear; For electrical control system may be the speed loop, position loop and related parameter is no longer the best matching state, shall be carried out again after mechanical fault basic optimization adjustment. 5, accidental outage here there are two possible: a case of related software design is as mentioned in the problems in operation and function of the specific operation under the combination of outages, general machine tools energizing will disappear when the power is cut off; Another situation is caused by environmental conditions, such as strong interference ( Grid or peripheral devices) , high temperature, humidity, etc. The environmental factors is usually ignored by people, such as southern region put machine in normal plant even near the door, electric cabinet run to open the door for a long time, there is a lot of near the dust, metal dust or water mist device and so on. These factors not only can cause failure, serious still can damage the system and nc machine tools, be sure to pay attention to improve.
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