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Typical fault characteristics of rotating machinery

Answer

The faults of rotating machinery are mainly the faults of its important components, such as rotors, bearings and gears. Typical faults of rotors include unbalance, bending, misalignment, oil film whirling, oil film oscillation, etc. Bearings are fatigued and peeled off and worn, and gears will break, Faults such as wear, fatigue spalling, broken teeth, etc., each type of fault has a certain cause, and the fault symptoms can be reflected by characteristic parameters.

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When the program is running, the workbench suddenly stops running, and the motor does not rotate?

Answer

This phenomenon is generally caused by a mechanical failure, but it can also be caused by a failure of the control system. At this time, the worktable can be returned to the origin first, and the processing program can be restarted. If the worktable always stops running when it runs to a certain position, it should be caused by damage, deformation or being stuck by foreign objects in a certain part of the transmission system. . First power off the control system, and then turn the lead screw by hand. If you feel that the resistance is too strong at a certain part or even can't turn at all, it proves that there is a fault in this position. Check whether the clearance between the screw nut and the screw or whether the slide insert is too tight, whether there are foreign objects in the ball guide groove of the ball screw, whether the screw is bent and deformed, whether the flexible gear in the motor reducer is loose or whether there is foreign matter stuck. Wait. If there is no abnormality in the manual cranking, the control system is faulty and should be checked according to the steps of 1.

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When the motor fails during operation, how to check and maintain it?

Answer

Observe whether there is any abnormality during the operation of the motor, which is mainly manifested in the following situations.
1. You may see smoke from the motor when the stator winding is short-circuited.
2. When the motor is seriously overloaded or running with phase loss, the speed will slow down and there will be a heavy 'humming' sound.
3. The motor runs normally, but when it stops suddenly, sparks will be seen at the loose connection; the fuse is blown or a component is stuck.
4. If the motor vibrates violently, it may be that the transmission device is stuck or the motor is not fixed properly, the foot bolts are loose, etc.

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Motor won't start?

Answer

1. There is a disconnection in the power line.
2. There is an open circuit in the stator winding.
3. The wire-wound rotor and its external circuit have an open circuit.

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What can cause problems with a CNC machine?

Answer

No matter how fast and efficient CNC machines are, they are not infallible. Just like any other type of machine or tool, they create problems and require maintenance. As with any other tool, there are certain things you can do that may inadvertently damage these machines. There are also clear steps you can take to keep them in good working order.
While there are certainly many issues that can cause problems and errors in CNC machining, some are more common than others. These problems are also easily overlooked and easily misdiagnosed.

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