Common faults of CNC machine tool spindle
The Role of the Spindle of CNC Machine Tools：
The spindle component of a CNC machine tool is composed of a spindle, support bearings, and transmission parts of the equipment on the spindle. The shaft located in the center of the rotation axis of a CNC machine tool. Sometimes the main shaft refers to the entire rotation element, including not only the shaft itself, but also its bearings and anything connected thereto. The spindle is the executive component of a CNC machine tool during processing. The spindle drives the workpiece to rotate and processes the workpiece of the rotating body. Therefore, its operating accuracy determines the processing accuracy of CNC machine tools.
The form of the spindle of a CNC machine tool determines the speed and cutting force. A variety of configurations and spindle options are available to meet the needs of different industries. Common examples include CNC lathe spindles, milling machine spindles, grinder spindles, electric spindles, low speed spindles, high speed spindles, and so on.
CNC machine tools with automatic tool change function require a higher rotational speed range of the spindle in order to meet the processing requirements of various tools, processes, and materials. The spindle is required to be able to achieve stepless speed regulation automatically in a wide speed range according to the instructions of the CNC system, reducing intermediate transmission links, and simplifying the spindle box.
Common faults of CNC machine tool spindle：
The spindle of a CNC machine tool is one of its important components. The state of the spindle not only affects the normal operation of the CNC machine tool, but also causes quality problems in the processed parts. Therefore, CNC machine tool operators should keep in mind common spindle faults and solutions.
If the spindle of a CNC machine tool stops immediately after starting, it may be that the output pulse time of the CNC system is insufficient and needs to be adjusted by the operator. In addition, there is also a possibility that the control components of the spindle circuit are damaged. We need to check whether the contacts on the component circuit are in good contact, and also check whether the DC relay and AC contactor are damaged, causing the contacts to fail to self-lock. Due to the complexity of the control components, professional personnel are required to repair or replace them.
The spindle of the CNC machine tool has been rotating and cannot be stopped. We need to check whether the AC contactor or DC relay is damaged. "Due to the inability to control due to prolonged closure, it is sufficient to replace the AC contactor or DC relay here.".