As the core part of the CNC woodworking engraving machine, the main shaft is the most frequently used, and of course it is also one of the most prone to problems. Due to long-term high-frequency operation and improper use, the spindle is prone to some noise. So, in actual operation, how should we deal with some noise from the spindle?
1. The sound of drizzling:
It is caused by the vibration and collision between the cage and the rolling elements. It may occur regardless of the type of grease, and it is more likely to occur when the moment, load, or radial clearance is large. Solution: Improve the accuracy of the retainer, choose a bearing with small clearance or apply a preload to the bearing, reduce the moment load, reduce the installation error, and choose a good grease.
2. Buzzing sound:
The motor makes a beeping sound when it is running without load, and the motor vibrates abnormally in the axial direction, and there is a buzzing sound when it is turned on or off. Solution: It often occurs when the lubrication state is not good, and the motor with ball bearings at both ends in winter is mainly an unstable vibration generated under the influence of axial vibration when the shaft alignment performance is not good.
3. Impurities:
Caused by bearings or high-quality cleanliness, an irregular abnormal sound is emitted. The sound sometimes disappears, sometimes loud and sometimes small, and occurs frequently on high-speed motors Solution: choose good grease, improve the cleanliness before grease injection, strengthen the sealing performance of the bearing, and improve the cleanliness of the installation environment.
4. The sound of da da:
The sound frequency changes with the bearing speed, and the waviness of the surface of the part is the main cause of the noise Solution: Improve the surface processing quality of the bearing raceway, reduce the waviness amplitude, reduce the bruise, correct the clearance preload and fit, check the operation of the free end bearing, and improve the precision installation method of the shaft and the bearing seat.
